Backyard accessory dwelling unit — Westminster, CO
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total budget. The biggest factor is whether you choose a prefabricated unit or a custom build on-site. Site preparation is also significant; if your land requires extensive grading, utility trenching, or foundation work, costs will climb. Your choice of finishes—like kitchen cabinetry, flooring, and siding materials—also shifts the bottom line. We help you navigate these variables to find a setup that fits your property. Exact pricing confirmed free on the call.
Frequently asked in Westminster
What are the rules for accessory dwelling units in Westminster?
How much does an accessory dwelling unit typically cost in Westminster?
Can I get a quick estimate for a detached accessory dwelling unit?
What is involved in building a backyard accessory dwelling unit?
Are there specific ADU requirements for homes in Westminster?
How do I find affordable accessory dwelling unit options?
What are the advantages of adding an in-law suite?
Also serving nearby: Arvada · Thornton · Denver · Lakewood · Boulder
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Westminster — population 114,875; about 3,633 residents per square mile across 31.6 sq mi. ZIP codes covered include 80030, 80031, 80035, 80036.
Neighborhoods served in Westminster: Downtown Westminster, Westminster West, Westminster East, Sheridan — and every surrounding area.
Areas we serve
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