Everything you need to know about getting a deck permit in Madison: fees, requirements, exemptions, and direct links to the Madison Building Inspection.
Permit Fees
Most decks under 250 sq ft: $75 flat fee. Decks over 250 sq ft: fee calculated after plan approval. Zoning review fee: $0.03/sq ft (min $25).
Processing Time
Same-day permit possible if plans meet code. Incomplete site plans may add weeks.
Apply Online
Yes — via Madison Development Services Center
Building Code
Wisconsin Uniform Dwelling Code (UDC, updated June 1, 2022) / SPS 321.225 / DCA6 accepted
Contact: (608) 266-4551
Deck board replacement under $500 does not require a permit. New deck construction always requires a permit.
If your deck does NOT meet all exemption criteria, you must obtain a permit before construction. Building without a required permit can result in fines, stop-work orders, and required demolition.
Review the exemption criteria above. If your deck exceeds any threshold, a permit is required.
You'll need a site plan, deck dimensions, framing details, and footing specifications. Check Madison's specific documentation requirements.
Apply through Madison Development Services Center . Pay the permit fee at submission.
Once approved, post your permit visibly and schedule required inspections (typically footing, framing, and final).
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Sources
Data verified April 2026. Fees, processing times, and requirements are subject to change. Always confirm current information with Madison's Madison Building Inspection.