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Cost of accessory dwelling unit — Denver, CO

Looking for cost of accessory dwelling unit in Denver, CO? Call AccessoryDwellingUnit Experts 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 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

Building an ADU involves several variables that influence the total investment, including your local site conditions, utility hookups, and the finishes you select for the interior. We focus on transparency throughout your project planning to keep you on budget. Exact pricing confirmed free on the call.

Frequently asked in Denver

What are the disadvantages of ADUs in Denver?

Potential disadvantages include upfront construction costs and the time it takes to navigate Denver's permitting process. You'll also need to consider ongoing maintenance and potential impacts on your existing yard space. It's important to weigh these against the benefits before proceeding with your ADU project.

How much does an ADU cost in Colorado?

The cost of an ADU in Colorado varies significantly based on size, materials, and site preparation needs in Denver. Complex foundations or challenging terrain can increase expenses. Get a personalized quote to understand the specific investment for your property.

What are the rules for ADUs in Denver?

Denver has specific zoning ordinances for ADUs, covering things like lot coverage, height restrictions, and where they can be located on your property. Understanding these rules ensures your project meets all legal requirements. Pros can explain these in detail for your specific address.

Is an ADU allowed in Colorado?

Yes, ADUs are generally allowed in Colorado, with specific regulations varying by municipality like Denver. Local ordinances dictate size, placement, and other crucial aspects. It's essential to check your city's specific rules.

What is the grant for ADUs in Colorado?
What factors influence ADU costs in Denver?

Key cost drivers for an ADU in Denver include the size and complexity of the design, the quality of materials chosen, and any necessary site work like utility connections or foundation preparation. The specific location within Denver can also impact labor and permit fees.

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, Highlands, Uptown — and every surrounding area.

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