
Ware Design Build
Ware Design Build. Custom home builder. 17500 W Liberty Ln, New Berlin, WI 53146, United States
Looking for the best custom ADU builders in New Berlin, Wisconsin? Our directory features 2 vetted custom adu builders serving the New Berlin area. Whether you're planning a new ADU construction, garage conversion, or backyard cottage, find the right builder for your project.

Ware Design Build. Custom home builder. 17500 W Liberty Ln, New Berlin, WI 53146, United States

Always Building Custom Homes, LLC. Custom home builder. 18500 W Lawnsdale Rd, New Berlin, WI 53146, United States
New Berlin is one of the top markets for accessory dwelling units in Wisconsin. With growing demand for affordable housing, ADU construction in New Berlin offers homeowners an excellent opportunity to add living space, generate rental income, or house family members. Our curated list of custom adu builders in New Berlin helps you find experienced professionals who understand local building codes, zoning regulations, and permit requirements.
ADU construction costs in New Berlin typically range from $150,000 to $350,000 depending on size, design, and finishes. Garage conversions are generally less expensive ($80,000–$150,000), while custom-built detached ADUs can cost more. Get free quotes from our listed custom adu builders to compare prices.
Yes, ADU construction in New Berlin requires building permits. Wisconsin has specific ADU regulations, and local zoning laws may have additional requirements. Our listed builders can help you navigate the permitting process.
ADU construction timelines in New Berlin typically range from 4–12 months, depending on the project type. Prefab ADUs can be installed in 2–4 months, while custom builds may take 8–12 months including design and permitting.