Low-Voltage Electrical Permit

Required in some Wisconsin municipalities for low-voltage wiring installations including structured cabling, security systems, fire alarm wiring, audio/video systems, and network cabling. Requirements vary — some municipalities include low-voltage work under the standard electrical permit, while others require a separate permit or exempt it entirely.

Verified 2026-02-01
Typical Fee Range
$25–$300
flat
Typical Timeline
1–3 business days
From application to approval
Inspection Required
No
No inspection typically required
Jurisdiction Level
Municipal
Issuing authority level

When Is a Low-Voltage Electrical Permit Required?

  • Security and alarm system wiring
  • Structured network cabling (Cat5e/Cat6)
  • Intercom and audio/video system wiring
  • Landscape lighting with transformers

When Is a Low-Voltage Electrical Permit NOT Required?

  • Plug-in devices that don't require permanent wiring
  • Wireless security systems with no hardwired components

Related Permits You May Also Need

Electrical Permit
Required for all electrical installations, alterations, and repairs in Wisconsin. The state adopts the National Electrical Code (NEC) with Wisconsin-specific amendments under SPS 316. All electrical work on residential dwellings must be performed by a licensed master or journeyman electrician, or by a homeowner on their own single-family residence.
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Fire Alarm System Permit
Required for installing, modifying, or replacing fire alarm systems in commercial and multi-family residential buildings in Wisconsin. Fire alarm systems must comply with NFPA 72 and Wisconsin's fire prevention code. Systems must be designed by qualified professionals, installed by certified technicians, and inspected by the local fire department or state-certified inspector before activation.
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Low-Voltage Electrical Permit Fees by Municipality

Fee and processing time data for low-voltage electrical permit permits across Wisconsin municipalities. Click any jurisdiction for complete details including application links and requirements.

JurisdictionFeeProcessing TimeStatus
City of Milwaukee$403-5 daysCurrent
City of Madison$353-5 daysCurrent
City of Green Bay$303-5 daysCurrent

Data note: Fees are sourced from official municipal fee schedules and verified periodically. Actual fees may vary based on project valuation and scope. Click any jurisdiction for the most current data and direct application links.

Frequently Asked Questions — Low-Voltage Electrical Permit

Do I need a permit for low-voltage wiring in Wisconsin?

It depends on your municipality. Some Wisconsin cities require a separate low-voltage permit, others include it under the standard electrical permit, and some exempt low-voltage work entirely. Fire alarm wiring typically requires a permit regardless. Check with your local building department.

Is a license required for low-voltage electrical work in Wisconsin?

Wisconsin does not require a statewide license for low-voltage electrical work (under 50 volts). However, fire alarm system installation requires certification through the Department of Commerce. Some municipalities may have additional local licensing requirements.

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