Prefabricated accessory dwelling unit — Nampa, ID
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
A prefab ADU is built in a factory and then transported to your property for final assembly. These units are often faster to build than traditional construction because the work happens in a controlled environment. If you want to minimize noise and debris on your property or need a quicker turnaround for your backyard space, this is a great option.
Frequently asked in Nampa
What are the local ADU rules in Nampa?
Where can I find ADU services near me in Nampa?
What's considered an affordable accessory dwelling unit in Nampa?
How much does an accessory dwelling unit cost in Nampa?
What ADU services are available in Nampa?
Can I build an accessory dwelling unit for rental in Nampa?
What are the requirements for a backyard accessory dwelling unit in Nampa?
Also serving nearby: Meridian · Boise City · Bend · Spokane Valley · Spokane
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Nampa — population 114,268; about 3,286 residents per square mile across 34.8 sq mi. ZIP codes covered include 83651, 83652, 83653, 83686, 83687.
Neighborhoods served in Nampa: Downtown Nampa, Greenhurst, Lake Shore, Park Ridge, Skyline — and every surrounding area.
Areas we serve
Browse by state, then city.