Boulder Designs
Billings, MT
5.0(0)
ADU ConstructionCustom Home BuildingGeneral Contracting
Boulder Designs. General contractor. 1315 Bitterroot Dr, Billings, MT 59105, United States
Looking for the best in-law suite builders in Billings, Montana? Our directory features 69 vetted in-law suite builders serving the Billings area. Whether you're planning a new ADU construction, garage conversion, or backyard cottage, find the right builder for your project.
Boulder Designs. General contractor. 1315 Bitterroot Dr, Billings, MT 59105, United States
DT Construction LLC. Contractor
Larch - Architecture. Architect. 2007 Elm St, Billings, MT 59101, United States
CB Built, LLC. Custom home builder. 6612 Western Wy Unit 3, Billings, MT 59106, United States
Advanced Custom Builders Inc. Carpenter
BRS Construction. Custom home builder
ODE Contracting & Construction LLC. Construction company. 300 Aristocrat Dr, Billings, MT 59105, United States
Home Builders Association of Billings. Association / Organization. 1645 Avenue D # F, Billings, MT 59102, United States
A&S Remodeling and Construction LLC. Remodeler
Advanced Construction. Construction company. 5229 King Avenue West, Unit E2, Billings, MT 59106, United States
Ban Construction. Construction company. 1340 Fisher Is Pl, Billings, MT 59106
Montana Made Projects. General contractor
ABConstruction. Construction company. 218 Peekaboo Trail, Hamilton, MT 59840
Americas Best Contractors, Inc.. Siding contractor. 3940 1st Ave S, Billings, MT 59101, United States
ABS Construction MT. Custom home builder
Upper Works Construction. Custom home builder. 224 Rumsey St, Anaconda, MT 59711
Duffy Construction LLC. Custom home builder
Alpine Architecture and Construction. Contractor
Dustin Davison Construction LLC. Custom home builder. 5526 King Eider Dr, Billings, MT 59106
Billings is one of the top markets for accessory dwelling units in Montana. With growing demand for affordable housing, ADU construction in Billings offers homeowners an excellent opportunity to add living space, generate rental income, or house family members. Our curated list of in-law suite builders in Billings helps you find experienced professionals who understand local building codes, zoning regulations, and permit requirements.
ADU construction costs in Billings 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 in-law suite builders to compare prices.
Yes, ADU construction in Billings requires building permits. Montana 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 Billings 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.