Accessory dwelling unit construction cost — Green Bay, WI
Last updated: September 24, 2026
Many Green Bay residents, with a population around 105,000, are curious about adding secondary housing units to their properties. This is a growing trend for accommodating family or increasing rental income. They have a solid understanding of the local landscape, from the historic areas to newer developments. Whether you're considering a detached backyard unit or an addition to your current home, these pros handle all aspects of the project. They ensure your ADU is compliant, functional, and built to last. Get clear, expert advice and a precise quote. Don't delay; call us today to explore your options.
What affects the price
Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.
About this service
The cost of building an ADU depends on your choice of materials, the square footage, and whether you are doing a garage conversion or a new detached build. Site access and utility upgrades also play a big role in the final bill. Exact pricing confirmed free on the call.
Frequently asked in Green Bay
Where can I find local ADU services in Green Bay?
Are modular accessory dwelling units a good option in Green Bay?
Who are the best ADU companies in Green Bay?
What about a backyard accessory dwelling unit in Green Bay?
What is the ADU cost in Green Bay?
What is the permit cost for an accessory dwelling unit in Green Bay?
Can I build a detached accessory dwelling unit in Green Bay?
Also serving nearby: Milwaukee · Madison · Kenosha · Waukegan · Grand Rapids
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Green Bay — population 105,744; about 2,325 residents per square mile across 45.5 sq mi. ZIP codes covered include 54301, 54302, 54303, 54304, 54305, 54306, 54307, 54308.
Neighborhoods served in Green Bay: Downtown Green Bay, Ashwaubenon, De Pere, Howard, Suamico — and every surrounding area.
Areas we serve
Browse by state, then city.
California (4)
All of California · Rialto · San Buenaventura (Ventura) · San Mateo · Vacaville