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.
Frequently asked in Nampa
What's involved in accessory dwelling unit construction in Nampa?
How do I find accessory dwelling unit builders in Nampa?
Are prefab ADUs a good option in Nampa?
What kind of accessory dwelling unit homes can be built?
What is a prefabricated accessory dwelling unit?
Can I get financing for an accessory dwelling unit?
Are accessory dwelling units for rent common 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: Lakeview, Cherry Lane, South Nampa, Vista Village, Franklin — and every surrounding area.
Areas we serve
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