Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
About this service
These are financial programs offered by local or state governments to help homeowners cover the upfront costs of building a secondary unit. You might look into these if you want to create housing but need assistance with the initial investment. Grant availability changes frequently based on regional housing goals and funding cycles. To see if you qualify for current programs that could offset your project expenses, we can discuss the requirements during your consultation. Exact pricing confirmed free on the call.
Frequently asked in Billings
What services are included in a '24 hour ADU' in Billings?
Where can I find an Accessory Dwelling Unit for rent in Billings?
What makes a good backyard Accessory Dwelling Unit in Billings?
Who is a qualified ADU builder in Billings?
What is the cost to build an Accessory Dwelling Unit in Billings?
How do I get an ADU estimate in Billings?
What ADU financing options are available in Billings?
Also serving nearby: Salt Lake City · West Valley City · Sandy · West Jordan · Fort Collins
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Billings — population 120,864; about 2,652 residents per square mile across 45.6 sq mi. ZIP codes covered include 59101, 59102, 59103, 59104, 59105, 59106, 59107, 59108.
Neighborhoods served in Billings: South Billings, West Billings, Heights, North Park, Central Billings — and every surrounding area.
Areas we serve
Browse by state, then city.
