Accessory dwelling unit contractor — Denver, CO

Looking for accessory dwelling unit contractor in Denver, CO? Call AccessoryDwellingUnit Pros for a contact a provider — no obligation. Licensed adu builders serve Denver and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.

About this service

A contractor manages the trades, materials, and timeline required to complete your backyard home. You need a contractor when you have design plans ready or need a lead to coordinate electricians, plumbers, and carpenters to get the structure move-in ready. They act as your project manager, ensuring that the work is finished on schedule and adheres to the building plans filed with your local municipality. Their role is essential for keeping the construction phase organized and safe.

Frequently asked in Denver

What are the disadvantages of ADUs?

While ADUs offer great benefits, potential disadvantages include increased utility usage for the main home and potential impacts on parking availability. Financing can sometimes be more complex than for a primary residence. Local regulations might also impose specific design or size restrictions. Discuss these factors with the pros when you call.

How much does an ADU cost in Colorado?

What are the rules for ADUs in Denver?

Can I build an ADU in my Denver backyard?

Yes, Denver generally permits ADUs in backyards, provided they meet zoning requirements for setbacks, lot coverage, and access. The type of ADU, whether detached or attached, will have different rules. A licensed, insured pro can confirm feasibility for your specific property.

What permits are needed for an ADU in Denver?

You'll need building permits from the City of Denver, which typically include architectural plans, structural engineering, and site plans. The pros who come out are familiar with the Denver permitting process and can guide you. This ensures your ADU meets all safety and code requirements.

What are some ADU design ideas for Denver?

Also serving nearby: Aurora · Thornton · Centennial · Westminster · Lakewood

All cities in Colorado →

More on this: HUD ADU resources — ADU policy and financing research.

Service area details

716,577residents

4,681per sq mile

8ZIP codes served

Serving all of Denver — population 716,577; about 4,681 residents per square mile across 153.1 sq mi. ZIP codes covered include 80201, 80202, 80203, 80204, 80205, 80206, 80207, 80208.

Neighborhoods served in Denver: Capitol Hill, LoDo, Cherry Creek, Uptown, The Highlands, Congress Park — and every surrounding area.