A basement finishing permit is usually needed once you build walls or turn storage space into living space, but each city words it differently. The table covers the three cities whose own pages we've checked line by line. The state rules below apply everywhere.
What three cities say
| City | What the city's own page says | Who to call |
|---|---|---|
| Milwaukee | Basement alterations or conversions: "Probably." All electrical work: yes, and the contractor must be licensed. Plumbing in a single-family, owner-occupied home: yes [1] | Plan Exam & Permits, 414-286-8210 [1] |
| Wauwatosa | New walls or any new habitable space need a building permit, painting alone doesn't, and a bedroom down there means adding another way out [2]. Finishing previously unfinished basements is on the permit list [3] | Building & Safety, (414) 479-8913 [2] |
| Brookfield | Rec Rooms: building yes, electrical yes, plumbing may be required. Kitchen Remodel: yes for all three [4] | Building Inspections, 262-796-6646 [4] |
For 21 other communities, our service areas page links to town notes taken from each municipality's own permit page.
Permit fees in Milwaukee and Wauwatosa
The city's Plan Review and Permit Fee Schedules list alterations, remodeling, and repairs at 1.6% of the cost of construction, with a minimum fee of $150 [5]. Plan exam for alterations and repairs is $0.25 per square foot of the total affected area, with a minimum fee of $125 [5]. A 1.6% training and technology surcharge applies to each permit fee, plus a $20 processing fee [5]. Where construction is started, or when a premises is occupied, without first obtaining a permit, the fees specified in this section may be quadrupled [5]. The one- and two-family section of that schedule has no printed effective date, so confirm the current fee with the city before you apply [5].
Wauwatosa may charge a double permit fee if work starts on site before the permit is issued [3].
State rules that apply everywhere
- Exits. Every basement needs one exit. A basement used for sleeping needs two, and an egress window in each bedroom can be the second [6]. Details are on egress windows.
- Ceiling height. 7 feet in habitable rooms, with exceptions for partial low areas, beams up to 8 inches and bathroom fixtures [7].
- Older homes. The Uniform Dwelling Code took effect June 1, 1980. It doesn't apply to homes started earlier, or to their alterations, unless the municipality adopts it for that work [8]. Ask your building department which rules cover your house.
- Who can pull the permit. A contractor pulling the permit for a house or duplex needs DSPS's DC and DCQ credentials. An owner who lives there and applies for their own permit doesn't [9].
Permit FAQs
Can I pull the permit myself?
In Wisconsin, an owner who lives in the home can get a building permit for work on it without the contractor credentials [9]. Towns add their own conditions. Waukesha and Oak Creek require homeowners to live at the address [10, 11], and Waukesha issues plumbing and electrical permits only to licensed contractors [10].
Does painting or new carpet need a permit?
Wauwatosa says painting basement walls without building new walls or rooms doesn't need one [2]. For other towns, check the town's list or call.
What if the basement was finished without a permit?
Ask the building department how to make it right. West Allis code says the owner may have to open wall, floor or ceiling finishes so the work can be inspected [12].
Request a quote and ask the contractor who will handle the permits.
We're a referral service, not a contractor, and independent contractors may pay us for referrals.
Sources
- City of Milwaukee DNS, Does It Need a Permit? (fetched Nov 11, 2026) https://city.milwaukee.gov/DNS/permits/PermitChecklist
- City of Wauwatosa, Building & Safety, FAQ (fetched Nov 11, 2026) https://www.wauwatosa.net/government/departments/building-safety
- City of Wauwatosa, Building Permit Basics (PDF, updated 11/2025) https://wauwatosa.gov/wp-content/uploads/2026/08/Building-Permit-Basics-UDC.pdf
- City of Brookfield, Items Requiring Permits (fetched Nov 11, 2026) https://www.ci.brookfield.wi.us/744/Items-Requiring-Permits
- City of Milwaukee DNS, Plan Review and Permit Fee Schedules (no effective date printed on the one- and two-family section; fetched Nov 11, 2026) https://city.milwaukee.gov/ImageLibrary/Groups/dnsAuthors/permits/Documents/DevCenterFeeCombo.pdf
- Wis. Admin. Code SPS 321.03, Exits (Register November 2024 No. 827; fetched Nov 11, 2026) https://docs.legis.wisconsin.gov/code/admin_code/sps/safety_and_buildings_and_environment/320_325/321/ii/03
- Wis. Admin. Code SPS 321.06, Ceiling height (fetched Nov 11, 2026) https://docs.legis.wisconsin.gov/code/admin_code/sps/safety_and_buildings_and_environment/320_325/321/ii/06
- Wis. Admin. Code SPS 320.05, Exemptions, and SPS 320.03, Effective date (same page; fetched Nov 11, 2026) https://docs.legis.wisconsin.gov/code/admin_code/sps/safety_and_buildings_and_environment/320_325/320/i/05
- Wisconsin DSPS, Dwelling Contractor Qualifier (DCQ), Building Permit Requirements (fetched Nov 11, 2026) https://dsps.wi.gov/a-z-professions-list/dwelling-contractor-qualifier-dcq/
- City of Waukesha, Residential Basement Remodel (fetched Nov 11, 2026) https://www.waukesha-wi.gov/government/departments/residential-basement-remodel.php
- City of Oak Creek, Residential Alteration (fetched Nov 11, 2026) https://www.oakcreekwi.gov/725/Residential-Alteration
- City of West Allis Code 13.05, Permits. https://westallis.municipalcodeonline.com/book/print?name=13.05_Permits&type=ordinances