Wisconsin Permit Exemption Summary
Which residential projects are exempt from building permits in Wisconsin municipalities. Covers sheds, fences, decks, roofing, siding, and other common projects with exemption thresholds by city.
Full Rankings
| # | Municipality / Item | Value | Detail |
|---|---|---|---|
| 1 | Madison | 200 sq ft shed | Most generous shed exemption; fences require permit; decks under 200 sq ft and under 30" exempt |
| 2 | Eau Claire | 200 sq ft shed | Same 200 sq ft shed threshold; fence permit required; deck exemption follows state UDC |
| 3 | La Crosse | 200 sq ft shed | 200 sq ft shed; no fence exemption; standard deck exemption |
| 4 | Appleton | 150 sq ft shed | Fences under 6 ft exempt from permit; standard deck exemption |
| 5 | Green Bay | 150 sq ft shed | Fence permit required; deck exemption at 200 sq ft and 30" height |
| 6 | Oshkosh | 150 sq ft shed | Standard exemptions; fence permit required for all new fences |
| 7 | Kenosha | 144 sq ft shed | 12x12 maximum footprint; standard deck exemption |
| 8 | Racine | 144 sq ft shed | 144 sq ft shed; fence permit required; standard deck |
| 9 | Janesville | 144 sq ft shed | Fences under 6 ft exempt; deck follows state code |
| 10 | Fond du Lac | 144 sq ft shed | Standard UDC-aligned exemptions |
| 11 | Milwaukee | 120 sq ft shed | Strictest shed threshold; all fences require permit; decks under 200 sq ft and 30" exempt |
| 12 | West Allis | 120 sq ft shed | Matches Milwaukee; fence permit required; standard deck exemption |
| 13 | Wauwatosa | 120 sq ft shed | 120 sq ft shed; all fences need permit; deck standard |
| 14 | Waukesha | 120 sq ft shed | Strict across the board; no fence exemption; deck follows state code |
| 15 | Brookfield | 120 sq ft shed | 120 sq ft; additional architectural review may apply in some subdivisions |
| 16 | New Berlin | 120 sq ft shed | Matches Waukesha County standard; no fence exemption |
| 17 | Greenfield | 120 sq ft shed | Milwaukee County standard; all fences permitted |
| 18 | Franklin | 120 sq ft shed | Milwaukee County standard; strict enforcement |
| 19 | Oak Creek | 120 sq ft shed | 120 sq ft; must maintain setbacks regardless |
| 20 | Sheboygan | 120 sq ft shed | Standard threshold; fence permit required |
Insights
There is no statewide shed exemption in Wisconsin. The UDC does not establish a minimum square footage threshold — each municipality sets its own. Thresholds range from 120 sq ft (Milwaukee, Waukesha County) to 200 sq ft (Madison, Eau Claire, La Crosse).
Only 3 of the 28 major municipalities exempt residential fences from permits: Appleton and Janesville exempt fences under 6 feet tall, and Stevens Point exempts replacement fences in kind. All other cities require a permit for any new fence installation.
Roofing permits are universally required. No major Wisconsin municipality exempts residential reroof projects from permitting. Even simple like-for-like shingle replacement requires a permit in all 28 surveyed cities.
The deck exemption is the most consistent across municipalities: decks under 200 square feet that are less than 30 inches above grade at any point are generally exempt. However, this exemption does not override zoning setback requirements.
Even when a building permit is exempt, zoning regulations still apply. A 200-square-foot shed in Madison does not need a building permit, but it must still comply with setback requirements (typically 3-5 feet from property lines) and lot coverage maximums (30-40% of total lot area).
Methodology
Exemption thresholds compiled from municipal building codes, zoning ordinances, and building department published guides. The shed threshold represents the maximum square footage of a detached accessory structure that does not require a building permit, assuming no electrical or plumbing service, no permanent foundation, and single-story construction. Fence exemptions refer to standard residential fences (not pool enclosures, which are regulated separately). Deck exemptions refer to attached or detached decks meeting both size and height criteria. Data verified Q4 2025.
Frequently Asked Questions
Do I need a permit to build a shed in Wisconsin?
It depends on the size and your municipality. Shed exemption thresholds range from 120 square feet (Milwaukee, Waukesha, Brookfield) to 200 square feet (Madison, Eau Claire, La Crosse). Even exempt sheds must comply with zoning setback requirements. Sheds with electrical or plumbing always require permits regardless of size.
What home projects are exempt from permits in Wisconsin?
Common exemptions include small sheds (under 120-200 sq ft depending on city), low decks (under 200 sq ft and under 30 inches above grade), interior cosmetic work (painting, flooring, cabinets with no structural/plumbing/electrical changes), and minor landscaping. Roofing, fencing, and electrical work almost always require permits.
Do I need a permit to replace my roof in Wisconsin?
Yes. All 28 major Wisconsin municipalities require a permit for residential roof replacement, including simple like-for-like shingle replacement. Roofing permits typically cost $75-$200 and require a final inspection. Working without a roofing permit can result in fines and complications during home sale.
Need permit costs for every project?
Access real-time fee data across all Wisconsin municipalities. Know the exact cost before you bid, and get notified when fee schedules change.