Find licensed deck builders and contractors across Wisconsin. Browse 10 cities with license data and local permit requirements.
10
Cities Covered
$18-$45
Cost per Sq Ft
$75-$500
Permit Fees
Wisconsin deck builders work under the Wisconsin Uniform Dwelling Code (SPS 320-325) for residential (based on IRC with WI amendments); Commercial Building Code (SPS 361-366) based on 2021 IBC. Wisconsin requires building permits for all one- and two-family dwellings under the statewide Uniform Dwelling Code (UDC), enforced in all municipalities since 1980. No person may obtain a residential building permit without holding a Dwelling Contractor certification or employing a Dwelling Contractor Qualifier (DCQ). Licensing is handled by the Wisconsin Department of Safety and Professional Services (DSPS) — Dwelling Contractor Certification, and homeowners can cross-check a contractor before hiring. On the exemption side: minor repairs and maintenance that do not affect structural integrity. A Wisconsin-specific rule most homeowners miss: wisconsin has a mandatory statewide Uniform Dwelling Code (UDC) for one- and two-family dwellings, enforced since June 1, 1980. The Milwaukee and Madison permit portals handle the bulk of Wisconsin deck permit submissions — if your project is in one of those cities, start there.
Milwaukee
Pop. 577,222
Madison
Pop. 269,840
Green Bay
Pop. 107,395
Kenosha
Pop. 99,877
Racine
Pop. 78,199
Appleton
Pop. 75,644
Waukesha
Pop. 72,489
Eau Claire
Pop. 69,421
Oshkosh
Pop. 66,816
Janesville
Pop. 65,615
Average costs for a typical 300 sq ft deck with railing in Wisconsin.
| Material | Low | Average | High |
|---|---|---|---|
| Pressure-Treated Wood | $5,616 | $7,200 | $9,504 |
| Cedar | $7,800 | $10,000 | $13,200 |
| Composite (Trex, TimberTech) | $10,920 | $14,000 | $18,480 |
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