3 Best ADU Builders in Kalispell, Montana
Verified ADU contractors and builders in Kalispell, MT
Showing 1–3 of 3 listings
Big Mountain Cabin Builders LLC
We design, assist with permitting, and build custom cabins and accessory dwelling units. Whether your project is delivered ready to set or constructed on-site - we handle feasibility, help with code compliance, and design so that you get a beautiful, durable build that fits your property, budget and timeline
Custom Tiny Homes of Montana
Specializing in accessory dwelling units throughout Montana, this Kalispell-based builder transforms properties with custom-built ADUs that maximize space and value. Whether you're looking to create rental income, housing for family members, or expand your living space, they deliver thoughtfully designed tiny homes tailored to your land and lifestyle.
Montana Log Homes
Montana Log Homes handcrafts one-of-a-kind log homes using large diameter logs milled to a specific profile in a dovetail style.
Frequently Asked Questions — ADU Builders in Kalispell
How much does it cost to hire an ADU builder in Kalispell?
ADU construction costs in Kalispell, 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 Kalispell to get accurate quotes for your specific project.
How long does it take to build an ADU in Kalispell?
In Kalispell, 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 Kalispell?
Yes, a building permit is required for ADU construction in Kalispell, 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 Kalispell?
Common ADU types in Kalispell 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 Kalispell ADU builder can advise on what's allowed on your specific parcel.