Wisconsin Permit & Licensing Glossary

A secondary residential unit on a single-family lot, such as a garage apartment, basement suite, or detached cottage. Wisconsin municipalities set their own ADU zoning rules, including size limits, parking requirements, and owner-occupancy conditions.

Adherence to the Americans with Disabilities Act standards for accessible design in commercial and public buildings. Wisconsin enforces ADA alongside state accessibility requirements in SPS 362, covering door widths, ramps, restrooms, and signage.

An American Land Title Association survey is a detailed boundary and title survey meeting national standards. It shows property lines, easements, encroachments, improvements, and utilities. Often required by lenders and title companies for commercial real estate transactions in Wisconsin.

A yearly inspection of a building, system, or equipment required to maintain operating permits or certificates. Wisconsin requires annual inspections for boilers, commercial kitchens, assembly venues, and certain fire protection systems.

A person enrolled in a state-registered apprenticeship program learning a licensed trade such as plumbing, electrical, or HVAC. In Wisconsin, apprentices work under the direct supervision of a journeyman or master tradesperson and must log required hours before testing for a journeyman credential through DSPS.

A municipal body that reviews building exterior designs in designated districts to ensure aesthetic compatibility. Common in Wisconsin historic districts and planned developments, the board evaluates materials, colors, massing, and architectural style before issuing design approval.

Revised construction drawings that reflect the building as actually constructed, including any field changes from the original plans. Wisconsin municipalities may require as-built drawings before issuing a certificate of occupancy, particularly for commercial projects and utility connections.

The controlled removal, encapsulation, or enclosure of asbestos-containing materials in a building. Wisconsin requires licensed asbestos abatement contractors for projects involving more than 3 linear feet or 3 square feet of asbestos material, with notification to the DNR at least 10 working days before work begins.

A building occupancy classification for structures used for gatherings of 50 or more people, such as churches, theaters, restaurants, and event venues. Wisconsin applies specific fire code, egress, and structural requirements to assembly occupancies under SPS 361–366.

A mechanical device installed on water supply lines to prevent contaminated water from flowing backward into the public water system. Wisconsin requires annual testing of backflow prevention assemblies by certified testers, and municipalities maintain registries of installed devices.

The computed elevation to which floodwater is anticipated to rise during a 1% annual chance (100-year) flood event. Wisconsin requires that the lowest floor of new construction in FEMA-designated flood zones be built at or above the BFE, and some municipalities require additional freeboard.

A diagnostic test that measures a building’s air tightness by depressurizing the structure with a calibrated fan mounted in an exterior door frame. Wisconsin’s energy code requires blower door testing for new residential construction to verify that air leakage does not exceed code maximums, typically 3–5 ACH50.

A safety inspection of pressure vessels and boilers required by Wisconsin law. DSPS regulates boiler inspections through SPS 341, requiring annual internal and external inspections by state-commissioned inspectors or authorized insurance company inspectors.

A survey performed by a licensed professional land surveyor to establish the exact property lines of a parcel. Required in Wisconsin before many construction projects, fence installations, and property line disputes. The survey identifies corners, monuments, and any encroachments.

A set of regulations governing the design, construction, alteration, and maintenance of buildings. Wisconsin uses the Uniform Dwelling Code (UDC) for one- and two-family homes, and the International Building Code (IBC) as adopted through SPS 361–366 for commercial structures.

The three-dimensional space within which a building is permitted to be constructed on a lot, defined by setback lines, height limits, and lot coverage maximums. In Wisconsin, the building envelope is determined by the applicable zoning district and any overlay districts.

The area of ground occupied by a building’s foundation, measured at grade level. Wisconsin zoning codes use the building footprint to calculate lot coverage ratios and determine compliance with impervious surface limits.

The municipal officer responsible for administering and enforcing building codes within a jurisdiction. In Wisconsin, building officials (also called building inspectors) must hold UDC certification from DSPS. They review permit applications, conduct inspections, and issue certificates of occupancy.

A device that detects the presence of carbon monoxide gas. Wisconsin law requires CO detectors on every level of a residential dwelling that has a fuel-burning appliance, attached garage, or fireplace. Detectors must be installed within 15 feet of sleeping areas.

A document issued by a municipality or state agency confirming that a building, system, or installation meets all applicable code requirements. In Wisconsin, certificates of compliance are commonly issued for POWTS (septic systems), elevator installations, and fire protection systems.

A document issued after an official inspection verifies that a building component or system meets code requirements. In Wisconsin, certificates of inspection are issued for boilers, elevators, electrical systems, and commercial buildings on periodic schedules set by DSPS.

A document issued by the local building department certifying that a building complies with all applicable codes and is safe for the intended use. In Wisconsin, a CO is required before any new commercial building or substantially renovated structure can be occupied.

A written agreement between the property owner and contractor to modify the original scope of work, including changes to materials, design, schedule, or cost. Significant change orders in Wisconsin may require an amended permit application if the changes affect structural, electrical, or plumbing systems.

The municipal function of ensuring compliance with building, zoning, and property maintenance codes. Wisconsin code enforcement officers can issue citations, stop-work orders, and fines for violations. Enforcement actions are typically triggered by complaints, inspections, or permit audits.

A permit required to operate a commercial food preparation facility. In Wisconsin, commercial kitchens must comply with the Wisconsin Food Code (ATCP 75) and obtain a food establishment license from the local health department. Plan review covers ventilation, grease traps, handwashing stations, and equipment placement.

A building occupancy classification for structures used for business, mercantile, or industrial purposes. Wisconsin regulates commercial occupancies under SPS 361–366, with requirements varying by occupancy type for fire protection, structural capacity, accessibility, and egress.

A zoning approval that allows a specific land use not otherwise permitted in a zoning district, subject to conditions set by the local plan commission or zoning board. In Wisconsin, conditional use permits are governed by Wis. Stat. §59.69 (counties) and §62.23 (cities and villages).

A stabilized pad of aggregate or geotextile fabric placed at the point where construction vehicles enter and exit a job site. Required under Wisconsin’s erosion control standards (NR 151) to prevent mud and sediment from being tracked onto public roads during construction.

The estimated total cost of a construction project, typically used by municipalities to calculate permit fees. Wisconsin municipalities may use the International Code Council’s building valuation data or require the applicant to provide a contractor’s estimate. Also called project valuation.

Mandatory ongoing training required to maintain a professional license or credential. Wisconsin’s DSPS sets CE requirements for each licensed trade, typically 12–24 hours per renewal cycle. Topics must be approved by the relevant examining board.

The process of registering with a municipality to perform construction work within its jurisdiction. Many Wisconsin cities require contractor registration in addition to state licensing, often including proof of insurance, bonding, and a valid DCQ or trade credential.

The periodic process of renewing a professional license or certification. Wisconsin credentials issued by DSPS typically renew on a 2-year or 4-year cycle, with requirements including continuing education hours, renewal fees, and documentation of active practice.

A program to prevent contamination of the public water supply through physical connections between potable and non-potable water sources. Wisconsin’s NR 810 and NR 811 require municipalities to maintain cross-connection control programs, including inspection and installation of backflow prevention devices.

An opening in a street curb to allow vehicle access from the road to a driveway or parking area. Wisconsin municipalities require a curb cut permit (or driveway permit) before modifying any public curb, and the work must meet municipal specifications for width, angle, and drainage.

A permit required to partially or fully demolish a building or structure. Wisconsin municipalities require demolition permits and typically mandate an asbestos inspection before issuance, notification of adjacent property owners, disconnection of all utilities, and erosion control measures.

The Wisconsin state agency responsible for regulating professions, trades, and buildings. DSPS administers the Uniform Dwelling Code, the commercial building code, and credentials for over 200 professions including electricians, plumbers, and contractors.

A regulatory process in which a municipal board evaluates proposed building exteriors for compliance with design standards. Wisconsin communities with design review ordinances typically apply them in downtown districts, historic areas, and planned developments.

A permit required to construct, widen, or relocate a driveway that connects to a public road. In Wisconsin, both municipal and county/state highway departments may require separate driveway permits depending on which road is accessed.

The system of metal or flexible ducts that distributes conditioned air from HVAC equipment throughout a building. Wisconsin’s mechanical code (SPS 323 for residential, SPS 363 for commercial) sets requirements for duct material, sizing, insulation, sealing, and fire dampers at rated walls.

A Wisconsin-specific credential issued by DSPS that qualifies a person to perform construction, remodeling, or repair work on one- and two-family dwellings under the Uniform Dwelling Code. The DCQ requires passing an exam covering the UDC, Wisconsin building practices, and business management.

A legal right to use another person’s property for a specific purpose, such as utility access, drainage, or a shared driveway. Wisconsin easements are recorded on the property deed and can restrict where buildings may be placed. They are shown on ALTA surveys and plat maps.

A path of exit from a building or room to the exterior. Wisconsin building codes require adequate egress from every habitable space, including minimum window sizes for bedrooms (5.7 sq ft), corridor widths, and the number of exits based on occupancy and floor area.

Regulations governing the installation and maintenance of electrical wiring, devices, and equipment. Wisconsin adopts the National Electrical Code (NEC) through DSPS administrative rules in SPS 316, with state-specific amendments. Only licensed electricians may perform permitted electrical work.

A periodic safety inspection of elevator, escalator, and lift equipment required by Wisconsin law. DSPS oversees elevator inspections statewide, requiring annual or semi-annual inspections depending on the type of conveyance. New installations require acceptance testing before use.

A condition where a building, structure, or improvement extends beyond the property line or into an easement, setback, or right-of-way. Wisconsin municipalities may require removal of encroachments or grant encroachment permits for minor intrusions into the public right-of-way.

Regulations setting minimum energy efficiency requirements for new buildings and major renovations. Wisconsin’s residential energy code is part of the UDC (SPS 322) and references the International Energy Conservation Code (IECC). Requirements cover insulation R-values, window U-factors, air sealing, and mechanical efficiency.

A site-specific plan detailing measures to prevent soil erosion and sedimentation during and after construction. Wisconsin requires erosion control plans for any land-disturbing activity exceeding 4,000 square feet under NR 151 and NR 216. Plans must address silt fencing, construction entrances, and stormwater management.

The federal agency that maps flood hazard areas and administers the National Flood Insurance Program (NFIP). FEMA’s Flood Insurance Rate Maps (FIRMs) determine flood zones in Wisconsin, which affect building permit requirements, insurance mandates, and construction standards.

A published list of permit fees charged by a municipality. Wisconsin municipalities set their own fee schedules for building, electrical, plumbing, and zoning permits. Fees are typically based on construction value, project square footage, or a flat rate depending on the permit type.

The last inspection conducted by a building official before a certificate of occupancy is issued. In Wisconsin, the final inspection verifies that all work matches the approved plans, all required inspections have been passed, and the building is safe for occupancy.

An integrated system of devices that detects fire, smoke, or carbon monoxide and alerts building occupants and the fire department. Wisconsin requires fire alarm systems in commercial buildings based on occupancy type and size under SPS 361–366, with design standards following NFPA 72.

A fire-resistance-rated wall assembly that restricts the spread of fire within a building. Wisconsin’s commercial building code requires fire barriers between different occupancy types, between dwelling units in multi-family buildings, and around stairways and elevator shafts.

Regulations governing fire prevention, fire protection systems, and means of egress in buildings. Wisconsin adopts a modified version of the International Fire Code through DSPS rules. Municipalities may adopt stricter local fire codes, and local fire departments conduct fire inspections.

A wall assembly with a fire-resistance rating used to separate dwelling units, sleeping rooms, or tenant spaces within a building. Fire partitions in Wisconsin must extend from floor to floor or from floor to the rated roof/floor assembly above, per SPS 361–366.

The minimum distance or fire-rated construction required between buildings or between different occupancies within a building. Wisconsin codes specify fire separation distances based on wall fire-resistance rating, percentage of openings, and proximity to property lines.

An active fire protection system that extinguishes or controls fires, most commonly an automatic sprinkler system. Wisconsin requires fire suppression systems in new commercial buildings exceeding certain size and occupancy thresholds per SPS 361–366, and in all new multi-family buildings with more than 20 units.

A fire-resistance-rated wall with structural stability under fire conditions that creates separate buildings for fire code purposes. In Wisconsin, fire walls allow what is physically one structure to be treated as two separate buildings for purposes of area, height, and construction type limitations.

The duration in hours that a building assembly (wall, floor, roof) can withstand fire exposure under standardized test conditions. Wisconsin building codes specify required fire-resistance ratings based on building type, height, occupancy, and proximity to property lines.

A geographic area identified by FEMA as having a specific level of flood risk. Wisconsin flood zones are shown on Flood Insurance Rate Maps (FIRMs) and determine building restrictions, insurance requirements, and construction standards. Zone AE requires structures to be elevated to or above the base flood elevation.

An area of land adjacent to a waterway that is subject to periodic flooding. Wisconsin’s floodplain zoning rules under NR 116 regulate construction in mapped floodplains. Building permits in floodplain areas require elevation certificates, flood-proofing plans, and compliance with both state and local ordinances.

A license required to operate a restaurant, catering business, food truck, or other establishment serving food to the public. In Wisconsin, the local health department (city or county) issues food service licenses after reviewing plans and inspecting the facility for compliance with ATCP 75.

A construction drawing showing the layout, dimensions, and specifications of a building’s foundation system. Wisconsin plan reviewers evaluate foundation plans for compliance with soil bearing capacity, frost depth requirements (48 inches minimum), waterproofing, and drainage.

A structural drawing showing the layout of a building’s load-bearing and non-load-bearing framing members, including joists, rafters, headers, and beams. Wisconsin plan reviewers use framing plans to verify structural adequacy under UDC or commercial code requirements.

The maximum depth to which ground freezes in winter. Wisconsin’s frost line is 48 inches statewide, and all exterior footings must be placed below this depth to prevent frost heave. This affects foundation, deck post, and fence post construction requirements.

An engineering assessment of subsurface soil and groundwater conditions at a construction site. Wisconsin municipalities may require geotechnical reports for commercial projects, hillside construction, or sites with suspected fill, high water tables, or poor soil conditions.

A site drawing showing existing and proposed ground elevations, drainage patterns, and earthwork quantities. Wisconsin municipalities require grading plans for most construction projects to verify proper drainage away from buildings and compliance with stormwater management ordinances.

A legally existing building or use that does not conform to current zoning or building code requirements but is permitted to continue because it predates the current regulations. Wisconsin calls these “legal non-conforming” structures. Significant expansion or damage beyond 50% of assessed value may trigger compliance with current codes.

The practice of protecting historically significant buildings, districts, and landmarks through regulation and incentives. In Wisconsin, local historic preservation commissions review changes to designated landmarks and districts, and the Wisconsin Historical Society administers the state and national registers.

Heating, ventilation, and air conditioning equipment and ductwork that controls a building’s temperature and air quality. Wisconsin requires permits for HVAC installation and replacement in commercial buildings, and for systems in UDC-regulated dwellings when installed by a contractor. Work must comply with the mechanical code (SPS 323).

A one-time fee charged by a municipality to fund public infrastructure improvements necessitated by new development. Wisconsin Stat. §66.0617 authorizes cities and villages to impose impact fees for parks, roads, water, sewer, and stormwater facilities.

Any surface that prevents water from infiltrating the ground, including buildings, pavement, concrete, and compacted gravel. Wisconsin zoning codes set maximum impervious surface ratios per lot to manage stormwater runoff, typically ranging from 25% to 80% depending on the zoning district.

A model building code published by the International Code Council (ICC) used for commercial and multi-family construction. Wisconsin adopts the IBC through DSPS administrative rules (SPS 361–366) with state-specific amendments. It covers structural design, fire protection, accessibility, and means of egress.

A model building code published by the International Code Council (ICC) for one- and two-family dwellings. Wisconsin does not directly adopt the IRC; instead, it uses the Uniform Dwelling Code (UDC), which references portions of the IRC while including Wisconsin-specific provisions through SPS 320–325.

A skilled tradesperson who has completed an apprenticeship and passed a state examination. In Wisconsin, journeyman credentials are issued by DSPS for trades including electrical, plumbing, and HVAC. Journeymen may work independently on permitted jobs but cannot supervise apprentices in some trades without a master credential.

Official recognition of a building or site as historically, architecturally, or culturally significant by a local, state, or national authority. In Wisconsin, locally designated landmarks are subject to review by the local historic preservation commission before any exterior alterations, additions, or demolition.

Paint containing lead, commonly found in buildings constructed before 1978. Wisconsin requires certified lead abatement contractors for removal work and certified inspectors for testing. Renovation of pre-1978 housing must follow EPA’s Renovation, Repair, and Painting (RRP) rule, and Wisconsin adds state notification requirements under DHS 163.

A FEMA-issued document that officially revises a Flood Insurance Rate Map to reflect changed flood risk, typically after a community completes a flood mitigation project or a surveyor demonstrates that a property was incorrectly mapped. In Wisconsin, LOMRs can remove properties from mandatory flood insurance requirements.

A legal document in which a contractor, subcontractor, or material supplier waives their right to file a mechanic’s lien against a property in exchange for payment. Wisconsin’s construction lien law (Wis. Stat. §779) governs lien rights, and lien waivers are commonly exchanged at payment milestones.

A license required to sell alcoholic beverages in Wisconsin. Municipal governing bodies issue liquor licenses under Wis. Stat. Ch. 125, with limits on the number of licenses based on population. License types include Class A (retail sales), Class B (tavern/restaurant), and operator’s licenses for bartenders.

A wall that carries structural loads from the roof or upper floors down to the foundation. In Wisconsin, removal or modification of a load-bearing wall requires a building permit, structural engineering analysis, and inspection to ensure adequate temporary and permanent support.

The percentage of a lot area covered by buildings and other roofed structures. Wisconsin zoning codes set maximum lot coverage by zoning district, typically ranging from 25% in residential districts to 80–90% in commercial and industrial districts.

The legal boundary of a parcel of land as defined by the recorded plat or deed. In Wisconsin, lot lines determine setback requirements, easement locations, and building envelope limits. A boundary survey is the definitive way to establish lot line locations.

The highest level of electrician credential in Wisconsin, issued by DSPS. A master electrician may pull electrical permits, supervise journeymen and apprentices, and take responsibility for all electrical work on a project. Requires passing the master electrician exam and meeting experience requirements.

The highest level of plumber credential in Wisconsin, issued by DSPS. A master plumber may pull plumbing permits, supervise journeymen and apprentices, and plan plumbing systems. Requires at least 5 years of experience and passing the master plumber exam.

The continuous and unobstructed path of travel from any point in a building to the public way. Wisconsin building codes require means of egress to include three components: the exit access (corridor or aisle), the exit (door or stairway), and the exit discharge (path to the street).

Regulations governing HVAC, ductwork, exhaust, and ventilation systems in buildings. Wisconsin adopts the International Mechanical Code through SPS 363 (commercial) and SPS 323 (residential) with state-specific amendments.

A building that combines two or more occupancy types, such as ground-floor retail with upper-floor apartments. Wisconsin applies the IBC’s mixed-occupancy provisions through SPS 361–366, requiring fire separations between different occupancy types and compliance with the most restrictive code for shared building elements.

A federal permit program under the Clean Water Act that regulates point-source discharges of pollutants to waters of the United States. In Wisconsin, the DNR administers NPDES permits through the Wisconsin Pollutant Discharge Elimination System (WPDES). Construction sites disturbing one or more acres must obtain coverage.

A land use that was legally established but no longer conforms to the current zoning ordinance due to a change in regulations. Wisconsin Stat. §62.23(7)(hb) protects legal non-conforming uses and limits municipal ability to force discontinuation unless the use is discontinued for 12 or more consecutive months.

Wisconsin Administrative Code chapter NR 151, which establishes performance standards for controlling erosion and managing stormwater runoff from construction sites and developed areas. Applies to any land-disturbing activity over 4,000 square feet.

Wisconsin Administrative Code chapter NR 812, which regulates the construction, maintenance, and abandonment of private water supply wells. All well drilling and pump installation in Wisconsin must comply with NR 812 and be performed by licensed well drillers and pump installers.

The categorization of a building based on its intended use, which determines the applicable building code requirements. Wisconsin uses IBC occupancy classifications (Assembly, Business, Educational, Factory, etc.) for commercial buildings and the UDC for residential dwellings.

A permit authorizing the use and occupancy of a building or space. In Wisconsin, this is functionally equivalent to a certificate of occupancy for new construction, or a change-of-occupancy permit when an existing building is converted to a new use.

A zoning district that applies additional requirements on top of the underlying base zoning. Common Wisconsin overlay districts include historic preservation overlays, flood hazard overlays, corridor overlays, and wellhead protection overlays.

A fee or land dedication required of developers to provide public park space for new residential subdivisions. Wisconsin Stat. §236.29 authorizes municipalities to require parkland dedication or a fee in lieu of land as a condition of subdivision plat approval.

A recurring inspection required at set intervals to verify ongoing code compliance of building systems. Wisconsin requires periodic inspections for boilers, elevators, fire alarm systems, and commercial buildings on schedules established by DSPS.

A professional who navigates the permit application process on behalf of builders, developers, or property owners. In Wisconsin, permit expeditors handle plan submissions, coordinate reviews across departments, track application status, and resolve issues to accelerate permit issuance.

The process by which a municipality reviews construction plans for compliance with building, fire, zoning, and accessibility codes before issuing a permit. Wisconsin plan reviews for commercial buildings are conducted by certified plan reviewers under DSPS oversight.

A fee charged by a municipality for reviewing construction plans as part of a permit application. In Wisconsin, plan review fees are typically calculated as a percentage (50–65%) of the building permit fee or as a flat fee based on project size. Fees are usually non-refundable.

A zoning designation that allows flexible site design and a mix of housing types, densities, and land uses within a defined area. In Wisconsin, PUDs are approved through a specific zoning petition process and allow deviations from standard zoning requirements in exchange for a comprehensive development plan.

A scaled drawing showing the property boundaries, existing and proposed structures, setbacks, and basic site features. A plot plan is a simpler version of a site plan and is typically required for residential building permit applications in Wisconsin.

Regulations governing the installation and maintenance of plumbing systems, including water supply, drainage, venting, and fixtures. Wisconsin’s plumbing code is administered by DSPS through SPS 381–387 and requires all plumbing work to be performed by licensed plumbers.

A private sewage system (septic system) for properties not connected to a municipal sewer. Wisconsin regulates POWTS under SPS 383 and requires a permit from the county or designated agent for installation, replacement, or modification. Soil testing and a state-certified designer are required.

The estimated total cost of construction used to calculate permit fees. Also called construction value. Wisconsin municipalities may accept the applicant’s estimate, use ICC building valuation tables, or apply a per-square-foot cost based on construction type.

The legally defined boundary of a parcel of land. In Wisconsin, property lines are established by recorded plats, certified surveys, or deeds and determine setback requirements, easement locations, and the buildable area of a lot.

A list of remaining construction tasks, corrections, and deficiencies that must be completed before final payment and occupancy. In Wisconsin, the building inspector may issue a temporary certificate of occupancy with a punch list of items to be resolved before the final CO is granted.

A measure of thermal resistance used to rate insulation effectiveness. Higher R-values indicate greater insulating power. Wisconsin’s energy code (SPS 322) specifies minimum R-values for walls, ceilings, and floors by climate zone — the state falls in IECC Climate Zones 6 and 7, requiring R-49 ceiling and R-20 wall insulation in most areas.

Techniques used to reduce radon gas levels in buildings, typically through sub-slab depressurization systems. Wisconsin has elevated radon levels in many counties, and the UDC requires radon-resistant new construction features in all new one- and two-family dwellings. Mitigation contractors must be certified by the National Radon Proficiency Program (NRPP) or equivalent.

An agreement between states to recognize each other’s professional licenses or credentials. Wisconsin has reciprocity agreements for certain trades and professions, allowing credential holders from neighboring states to practice in Wisconsin with reduced or waived examination requirements.

EPA Section 608 certification required to purchase and handle refrigerants used in air conditioning and refrigeration systems. While this is a federal certification, Wisconsin HVAC contractors must hold it to perform work involving refrigerants, and contractors must follow EPA’s refrigerant management requirements.

A building occupancy classification for structures providing sleeping accommodations, including single-family homes, duplexes, apartments, hotels, and dormitories. Wisconsin regulates one- and two-family residential occupancies under the UDC, and larger residential buildings under SPS 361–366.

A strip of land reserved for public infrastructure such as roads, sidewalks, and utilities. In Wisconsin, work within the public right-of-way — including utility connections, driveway installations, and landscaping — requires a right-of-way permit from the municipality.

A permit required before performing any work within the public right-of-way, including utility installations, driveway construction, sidewalk repair, and tree planting. Wisconsin municipalities issue right-of-way permits with conditions for traffic control, restoration, and bonding.

An inspection of concealed building systems (framing, wiring, plumbing, HVAC ductwork) conducted before walls and ceilings are closed up with drywall or other finishes. In Wisconsin, rough-in inspections are a required milestone in the permit process for both residential and commercial projects.

A detailed description of the construction activities, materials, and deliverables included in a project or contract. In Wisconsin, the scope of work described on a permit application must match the actual work performed; changes may require an amended permit.

A permit required for the installation, replacement, or modification of a private onsite wastewater treatment system (POWTS). In Wisconsin, the county issues septic permits after review of soil tests, system design by a certified designer, and site evaluation.

The minimum required distance between a building and a property line, street, or other feature. Wisconsin zoning codes establish front, side, and rear setbacks for each zoning district. Setbacks vary by municipality and zoning classification, typically ranging from 5 feet (side) to 25 feet (front).

The underground pipe connecting a building’s plumbing system to the municipal sanitary sewer main. In Wisconsin, property owners are responsible for the sewer lateral from the building to the sewer main, and permits are required for new connections, repairs, and replacements.

A permit required for construction, repair, or removal of sidewalks within the public right-of-way. Wisconsin municipalities issue sidewalk permits with specifications for materials, thickness, slope, and ADA compliance. Some cities require permits even for private sidewalk replacement if it connects to the public walkway.

A permit required to install, alter, or relocate a sign. Wisconsin municipalities regulate signs through zoning ordinances covering size, height, illumination, placement, and type (freestanding, wall-mounted, projecting, temporary). Some municipalities require separate electrical permits for illuminated signs.

A temporary erosion control barrier made of geotextile fabric supported by posts, installed downslope of disturbed soil to filter sediment from runoff. Wisconsin’s NR 151 requires silt fencing or equivalent sediment barriers on construction sites to prevent sediment from leaving the site.

A scaled drawing showing a property’s boundaries, existing and proposed structures, parking, landscaping, utilities, grading, and stormwater management. Wisconsin municipalities require site plans for most commercial, multi-family, and subdivision permit applications.

A device that detects smoke and sounds an alarm. Wisconsin requires smoke detectors on every level of a dwelling, inside each sleeping room, and outside sleeping areas. Detectors in new construction must be hardwired with battery backup and interconnected so all alarms sound simultaneously.

An analysis of soil conditions at a building site, including soil type, bearing capacity, percolation rate, and groundwater depth. Wisconsin requires soils reports for POWTS (septic) permits and may require them for commercial foundations, hillside construction, or sites with problematic soil conditions.

A permit authorizing a specific land use in a zoning district where that use is allowed only with special approval and conditions. In Wisconsin, the term is often used interchangeably with conditional use permit, though some municipalities distinguish between the two in their ordinances.

An automatic fire suppression system that uses a network of pipes and sprinkler heads to release water when activated by heat. Wisconsin requires sprinkler systems in new commercial buildings exceeding certain size thresholds and in multi-family residential buildings with more than 20 units, per SPS 361–366 and NFPA 13.

The Wisconsin Administrative Code chapters that contain the Uniform Dwelling Code (UDC) for one- and two-family dwellings. SPS 320 covers administration, SPS 321 covers construction standards, SPS 322 covers energy conservation, SPS 323 covers HVAC, SPS 324 covers electrical, and SPS 325 covers plumbing.

The Wisconsin Administrative Code chapters that contain the commercial building code, adopting the IBC and related International Codes with Wisconsin-specific amendments. SPS 361 covers administration, SPS 362 covers building and accessibility, SPS 363 covers mechanical, SPS 364 covers energy, SPS 365 covers fire, and SPS 366 covers existing buildings.

The Wisconsin Administrative Code chapter governing mechanical systems (HVAC, exhaust, ventilation, ductwork) in commercial buildings. SPS 363 adopts the International Mechanical Code with Wisconsin-specific amendments administered by DSPS.

An official order issued by a building official or code enforcement officer requiring all construction activity to cease immediately. In Wisconsin, stop-work orders are issued for work without permits, work that deviates from approved plans, unsafe conditions, or code violations discovered during inspection.

A stormwater management strategy that temporarily holds runoff and releases it slowly to reduce peak flow rates. Wisconsin municipalities require detention facilities (ponds, underground vaults, or surface basins) for developments that increase impervious surface area above local thresholds.

The planning, design, and implementation of systems to control the quantity and quality of runoff from developed land. Wisconsin’s stormwater rules under NR 151 and NR 216 require post-construction stormwater management for developments that disturb one or more acres.

A site-specific plan identifying potential sources of stormwater pollution during construction and describing the best management practices (BMPs) to control them. Wisconsin requires a SWPPP for any construction site disturbing one or more acres, filed with the DNR as part of the WPDES general permit.

A stormwater management strategy that captures and holds runoff permanently, allowing it to infiltrate into the ground or evaporate rather than being discharged. Wisconsin promotes retention through practices like rain gardens, permeable pavement, and infiltration basins.

A permit required to cut into, excavate, or otherwise disturb a public street surface. Wisconsin municipalities issue street opening permits for utility installations, sewer connections, and other subsurface work, with requirements for traffic control, trench compaction, and surface restoration.

A licensed professional engineer specializing in the structural integrity of buildings and other structures. In Wisconsin, a structural engineer’s stamp is required for commercial building plans and for residential projects involving unusual loads, spans, or foundation conditions.

A financial guarantee from a bonding company that a contractor will fulfill their contractual obligations. Wisconsin municipalities may require surety bonds for public works contracts, right-of-way work, and as a condition of contractor registration. Bond amounts vary by project type and municipality.

A designated area where property tax revenue from increased property values is used to finance public improvements and incentivize private development. Wisconsin municipalities create TIF districts under Wis. Stat. §66.1105 to fund infrastructure, environmental cleanup, and economic development within the district.

A document that permits limited occupancy of a building before all final inspections and corrections are completed. Wisconsin building officials issue TCOs with a specific expiration date and a list of remaining items (punch list) that must be resolved before a permanent CO is granted.

Construction work done to customize a leased commercial space for a tenant’s specific use. Wisconsin requires building permits for tenant improvements that involve structural, electrical, plumbing, or mechanical changes. A change in occupancy classification also triggers code compliance review.

A survey that maps the elevation contours, slopes, and natural and man-made features of a property. Wisconsin municipalities require topographic surveys for commercial developments, subdivision plats, and projects in areas with significant grade changes for grading and stormwater design.

A permit required before removing trees from private or public property. Many Wisconsin municipalities have tree preservation ordinances that protect trees above a certain diameter (often 6–12 inches DBH), requiring a permit, replacement planting, or a fee before removal is allowed.

Wisconsin’s statewide building code for one- and two-family dwellings, established under Wis. Stat. §101.65 and codified in SPS 320–325. The UDC is enforced by DSPS and administered locally by certified municipal or county building inspectors. It covers structural design, energy efficiency, electrical, plumbing, and HVAC requirements.

A fee charged by a municipality to connect a new building to the public water, sewer, or stormwater system. Wisconsin utility connection fees cover the cost of extending service to the property and may include a capacity charge for the infrastructure investment. Fees vary significantly by municipality.

A deviation from the dimensional or use requirements of a zoning ordinance, granted by a zoning board of adjustment or appeals. In Wisconsin, a variance requires the applicant to demonstrate unnecessary hardship under Wis. Stat. §62.23(7)(e)(7) that is unique to the property and not self-created.

The underground pipe connecting a building’s plumbing system to the municipal water main. In Wisconsin, water service installations require a permit from the municipality and must be performed by a licensed plumber. The property owner is responsible for the service line from the main to the building.

A permit required for drilling, reconstructing, or abandoning a private water supply well in Wisconsin. Well permits are issued by the DNR under NR 812 and require the work to be performed by a licensed well driller. All wells must meet setback distances from septic systems, property lines, and potential contamination sources.

A scientific field study that identifies the boundaries of wetlands on a property using vegetation, soil, and hydrology indicators. Wisconsin requires wetland delineation before construction in or near potential wetland areas, as regulated by the Army Corps of Engineers (federal) and the DNR (state) under NR 103.

A defined area within a municipality where specific land use regulations apply, including permitted uses, building heights, setbacks, lot coverage, and density. Wisconsin municipalities adopt zoning ordinances under Wis. Stat. §62.23 (cities and villages) or §59.69 (counties).

An authorized deviation from the strict application of a zoning regulation. Wisconsin recognizes two types: use variances (allowing a prohibited use) and area variances (allowing deviation from dimensional requirements like setbacks or height). Area variances are more commonly granted and require a lesser standard of hardship.