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 contractor oversees the physical build, managing the subcontractors, materials, and daily construction progress. They are responsible for making sure the structure is built according to the approved plans and local safety standards. You need a contractor when you have your designs finalized and are ready for the actual building phase to begin. They act as the primary point of contact for all site activity.
Frequently asked in Denver
What are the benefits of a prefabricated ADU in Denver?
Prefabricated ADUs can offer several advantages for Denver homeowners. They often have faster construction times because many components are built off-site in a controlled environment. This can lead to more predictable timelines and potentially cost savings. They also tend to have consistent quality. We can help you explore if a prefab option is right for your Denver property. It's a modern approach to ADU building.
What does 'accessory dwelling unit' mean in Denver?
In Denver, an accessory dwelling unit (ADU) refers to a secondary, independent living space on a single-family lot. This could be a basement apartment, an addition, or a separate backyard cottage. The key is that it's a complete, habitable unit with its own kitchen and bathroom. It offers flexibility for homeowners. It's a practical way to increase housing density within existing neighborhoods.
How much does it cost to build an ADU in Denver?
Are ADUs allowed in all parts of Denver?
Denver has specific zoning regulations that govern where and how accessory dwelling units can be built. Generally, they are permitted in most single-family residential zones, but there are rules regarding size, setbacks, and parking. It's essential to check the specific requirements for your neighborhood. We can help you navigate Denver's ADU ordinances. Let's ensure your project is compliant.
What are the steps for ADU building in Denver?
Can I get 24-hour ADU services in Denver?
While 24-hour service isn't typically applicable for the entire ADU construction process, prompt responses are crucial. For emergency situations or urgent questions that arise during construction, having a reliable contact is key. We aim to provide timely communication and support throughout your project. Our focus is on efficient project management and addressing your needs promptly. Let's get your project started right.
What kind of homes are considered 'homes with in-law suites'?
Homes with in-law suites are essentially homes that have a self-contained living space separate from the main living area. This is very similar to what an accessory dwelling unit offers. These suites typically include a bedroom, bathroom, and sometimes a kitchenette or full kitchen. They provide independent living quarters for family members or guests. They add significant flexibility to a property in Denver.
Also serving nearby: Aurora · Thornton · Centennial · Westminster · Lakewood
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
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: LoDo, RiNo (River North Art District), Capitol Hill, Cherry Creek, Highlands — and every surrounding area.
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