Detached accessory dwelling unit — Centennial, 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.
About this service
A detached ADU is a standalone building separate from the main house, such as a backyard cottage or a converted carriage house. Homeowners prefer this style because it provides the most privacy for occupants and keeps the main residence quiet. Since it is a completely separate structure, it often requires independent utility connections and foundation work. Exact pricing confirmed free on the call.
Frequently asked in Centennial
How do I get an ADU estimate in Centennial?
Are ADU services available near me in Centennial?
What are the permit requirements for an ADU?
Can I build a backyard accessory dwelling unit?
Yes, you can build a backyard accessory dwelling unit. These are a popular choice for maximizing property use. They offer a private, detached living space. The pros are experienced in designing and constructing backyard ADUs. They ensure it integrates well with your existing landscape. Let's discuss your backyard ADU vision.
What accessory dwelling unit financing options exist?
What are the benefits of accessory dwelling unit rental?
What accessory dwelling unit builders are recommended?
Also serving nearby: Aurora · Denver · Lakewood · Westminster · Arvada
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Centennial — population 106,883; about 3,544 residents per square mile across 30.2 sq mi.
Neighborhoods served in Centennial: Cherry Creek, Southglenn, Littleton, Aurora, DTC (Denver Tech Center) — and every surrounding area.
Areas we serve
Browse by state, then city.
California (4)
All of California · Rialto · San Buenaventura (Ventura) · San Mateo · Vacaville