Adu permit — Boulder, CO
Last updated: September 24, 2026
What affects the price
Building an ADU involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.
About this service
Obtaining an ADU permit is the formal process of getting local government approval to build your secondary unit legally. You need this step before any construction begins to ensure your project complies with zoning, safety, and building codes. Fees for permits are influenced by the size of the structure and the specific requirements of your city or county jurisdiction. Exact pricing confirmed free on the call.
Frequently asked in Boulder
What are the best ADUs for my property in Boulder?
Where can I find ADU builders near me in Boulder?
What ADU services are available in Boulder?
What is the ADU cost in Boulder?
What does accessory dwelling unit mean?
An accessory dwelling unit (ADU) is a secondary, independent living space on a single-family lot. It has its own kitchen, bathroom, and entrance. ADUs are versatile, serving as rental units, guest houses, or homes for family. They are a smart way to add value and utility to your property in Boulder.
Are there ADU financing options in Boulder?
What is ADU construction in Boulder?
Also serving nearby: Longmont · Westminster · Arvada · Thornton · Lakewood
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Boulder — population 105,898; about 3,937 residents per square mile across 26.9 sq mi. ZIP codes covered include 80301, 80302, 80303, 80304, 80305, 80306, 80307, 80308.
Neighborhoods served in Boulder: Pearl Street, Gunbarrel, Newlands, Whittier, Mapleton Hill — and every surrounding area.
Areas we serve
Browse by state, then city.