2 Best ADU Builders in Milwaukee, Wisconsin
Verified ADU contractors and builders in Milwaukee, WI
Showing 1–2 of 2 listings
JD Griffiths Company, Inc
Specializing in garage-to-living-space conversions throughout Milwaukee, this experienced contractor transforms underutilized garages into functional rooms that add value and livability to your home. From design consultation through final installation, they handle every aspect of your garage conversion project with professional expertise.
TERRA ADU BUILDERS
Modern Backyard ADUs — Fixed Pricing. Local Expertise. Studio to 2‑bed accessory dwelling units purpose‑designed for Milwaukee lots. We handle feasibility, permits, utilities, and construction so you get a predictable, move‑in ready space.
Frequently Asked Questions — ADU Builders in Milwaukee
How much does it cost to hire an ADU builder in Milwaukee?
ADU construction costs in Milwaukee, Wisconsin vary widely depending on size, type, and site conditions. Detached ADUs typically range from $150,000–$400,000+, while garage conversions and attached ADUs can be more affordable. Contact multiple builders in Milwaukee to get accurate quotes for your specific project.
How long does it take to build an ADU in Milwaukee?
In Milwaukee, the ADU construction timeline typically ranges from 6 to 18 months from permit application to move-in. Permitting alone can take 2–6 months depending on Wisconsin local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in Milwaukee?
Yes, a building permit is required for ADU construction in Milwaukee, Wisconsin. Your ADU builder will typically handle the permit application as part of their service. Wisconsin has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in Milwaukee?
Common ADU types in Milwaukee include detached ADUs (backyard cottages), attached ADUs, garage conversions, basement conversions, and prefab/modular ADUs. The best type for your property depends on lot size, zoning, and budget. A local Milwaukee ADU builder can advise on what's allowed on your specific parcel.