Accessory Dwelling Unit Companies in Denver, CO | AccessoryDwellingUnit Experts

Looking for accessory dwelling unit companies 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

These companies provide end-to-end management for property owners looking to add a secondary unit. They typically offer a mix of design, permitting, and construction management services to streamline the project. You need to hire a company when you want a structured, professional approach to the entire build process rather than managing individual subcontractors yourself. They help ensure your unit is built to code, on time, and aligned with your budget goals.

Frequently asked in Denver

How much does an ADU cost in Denver?

What are the rules for ADUs in Denver?

Denver has specific zoning ordinances and building codes that govern ADU construction. These rules often address lot coverage, setbacks, parking requirements, and occupancy. Understanding these regulations is vital for a smooth permitting process. A local ADU expert can guide you through the specific requirements for your Denver location.

Can I build an ADU in my Denver neighborhood?

Generally, most Denver neighborhoods allow for ADUs, but there can be specific restrictions based on zoning. For example, lot size, existing structures, and street access can all play a role. It's always best to confirm the specific rules for your address by speaking with a local specialist.

What is the grant for ADUs in California?

While there isn't a direct state grant program for ADUs in Denver, exploring financing options with local lenders is a common approach. Discussing your project's budget with a professional can help identify potential cost savings.

How long does ADU permitting take in Denver?

The permitting timeline for an ADU in Denver can vary depending on the complexity of your project and the current workload at the city's planning department. Thorough preparation of your plans and understanding of local regulations can help expedite the process. Discussing your project with an experienced ADU professional can provide a more accurate estimate.

What are the advantages of adding an ADU in Denver?

Adding an ADU in Denver can provide rental income, increase your property value, and offer flexible living space for family members. It's a smart way to maximize your existing lot. The long-term financial benefits and increased utility of your property are significant advantages to consider.

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: Highlands, Congress Park, Cherry Creek, Sunnyside, Uptown — and every surrounding area.