Before you get quotes
In Madison, deck height drives the paperwork. A deck under three feet can extend to the lot line in most cases, while a taller one has to meet setbacks and needs a site plan. Building Inspection says it will help you pick a footing type, and the footings themselves must reach at least 48 inches.
- Deck height: under or over three feet
- Distance to each lot line
- Post and beam layout
- Door, stairs and grill spots
Sources: Wisconsin Uniform Dwelling Code, SPS 325 Appendix B · City of Madison Development Services Center, Decks. Checked November 9, 2026. Confirm current requirements with your building inspector.
Near Madison
Price check
See the Madison deck cost guide for 2026 published price ranges and permit fees from Madison and Verona.
Related
Questions about new deck building
Are you the deck builder?
An independent builder you hire directly. This is a Madison-area referral site, so we pass your request along; we do not build, price or guarantee anything.
Can Madison issue a deck permit the same day?
The city says it can review plans and issue a deck permit on the spot if the design meets code. Appointments are needed at the permit counter.
What drawings does Madison want?
Construction drawings showing deck size, post locations, beam sizes and joist size and spacing, plus a site plan if the deck is over three feet high.
Is a permit needed?
In Madison, yes: the city says you need a permit to build a deck. Fitchburg requires one for decks 24 inches or more above grade, Sun Prairie wants a drawing and site plan, and Verona lists a $300 deck permit. Each Dane County community sets its own rules.