Accessory dwelling unit homes — Billings, MT
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 fully functional homes designed to fit on residential lots, offering a kitchen, bathroom, and living area. They are ideal for creating a permanent living arrangement for relatives or for generating rental income. You need this service when you have the space and desire to add a self-contained unit to your property. We help you balance your personal needs with site-specific building requirements. Exact pricing confirmed free on the call.
Frequently asked in Billings
What is a backyard accessory dwelling unit?
What are the benefits of accessory dwelling unit builders in Billings?
Are ADU services available in New Hampshire through your service?
What ADU services do you offer in Billings?
What is a detached accessory dwelling unit?
Is 24-hour ADU service available in Billings?
What makes an accessory dwelling unit affordable 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 Hills, The Heights, North Park, West Billings, Rimrock — and every surrounding area.
Areas we serve
Browse by state, then city.