2 Best ADU Builders in Great Falls, Montana
Verified ADU contractors and builders in Great Falls, MT
Showing 1–2 of 2 listings
Dynamite Builders LLC
Specializing in accessory dwelling unit construction throughout Great Falls, MT, this contractor delivers quality ADUs that maximize your property's potential and value. From design consultation through completion, they handle all aspects of building new living spaces on residential lots.
Montana Shed Center
For over 10 years, we’ve been proudly serving homeowners, landowners, and families across Montana and Wyoming with high-quality prefab cabins and ADUs, as well as sheds, barns, and more. We believe that every customer deserves a building that fits their lifestyle, budget, and property—and we work hard to make that happen with honest communication, skilled craftsmanship, and reliable service.
Frequently Asked Questions — ADU Builders in Great Falls
How much does it cost to hire an ADU builder in Great Falls?
ADU construction costs in Great Falls, Montana 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 Great Falls to get accurate quotes for your specific project.
How long does it take to build an ADU in Great Falls?
In Great Falls, 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 Montana local regulations. Prefab and modular ADUs often have faster timelines than site-built units.
Do I need a permit to build an ADU in Great Falls?
Yes, a building permit is required for ADU construction in Great Falls, Montana. Your ADU builder will typically handle the permit application as part of their service. Montana has adopted streamlined ADU permitting laws in recent years, which may reduce wait times.
What types of ADUs can be built in Great Falls?
Common ADU types in Great Falls 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 Great Falls ADU builder can advise on what's allowed on your specific parcel.