Homes with mother in law suites — 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
Adding a mother-in-law suite is a popular way to provide comfortable, accessible housing for family members on your own property. These suites usually include a kitchenette and private bathroom. You need this if you want to provide independent living for loved ones while keeping them close by.
Frequently asked in Billings
What is the ADU permit process in Billings?
What ADU services are offered in Billings?
ADU services in Billings encompass the entire project lifecycle, from initial design to final construction. This includes site evaluation, architectural design, obtaining necessary permits, and the physical build of the accessory dwelling unit. Whether you envision a detached backyard cottage or an attached in-law suite, the pros can manage the project. They ensure a high-quality, code-compliant ADU.
Are there ADU builders in Billings?
What does 'homes with in-law suites' mean in Billings?
'Homes with in-law suites' in Billings refers to properties that have a secondary, independent living unit attached or adjacent to the main residence. These suites are designed to provide comfortable and private accommodation for elderly parents, adult children, or guests. They typically include their own bedroom, bathroom, and often a small kitchen or kitchenette. They offer a practical solution for multi-generational living.
Where can I find ADU near me in Billings?
What is ADU financing in Billings?
What does accessory dwelling unit mean?
An accessory dwelling unit (ADU) means a secondary, independent living unit located on a single-family residential lot. It is separate from the primary dwelling but on the same property. ADUs typically have their own kitchen, bathroom, and sleeping area. They offer flexibility for homeowners, whether for family members, renters, or guests. They are also known as in-law suites or backyard cottages.
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: North Park, South Park, Central Billings, West Billings, The Heights — and every surrounding area.
Areas we serve
Browse by state, then city.