Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.
About this service
A prefab ADU is built in a factory and then transported to your property for final assembly. You might choose this if you want a faster construction timeline and less mess in your backyard compared to a traditional build. Because the structure is made off-site, it often helps with site control and weather-related delays. Exact pricing confirmed free on the call.
Frequently asked in Greeley
What's the best accessory dwelling unit for my Greeley property?
How can I find an ADU near me in Greeley?
Are there affordable ADU options in Greeley?
How do I get an ADU quote in Greeley?
What are the options for ADU housing in Greeley?
What is a prefab ADU?
What is an accessory dwelling unit for rent?
Also serving nearby: Fort Collins · Longmont · Thornton · Boulder · Westminster
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Greeley — population 112,609; about 2,277 residents per square mile across 49.4 sq mi. ZIP codes covered include 80631, 80632, 80633, 80634, 80638, 80639.
Neighborhoods served in Greeley: Timnath, Windsor, Evans, Johnstown, Loveland — and every surrounding area.
Areas we serve
Browse by state, then city.
