What does accessory dwelling unit mean — 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
An accessory dwelling unit is a secondary, self-contained living space located on the same lot as a primary single-family home. It includes its own kitchen, bathroom, and sleeping area. You might ask this if you are exploring ways to increase your property value or provide housing for relatives. These units can be attached, detached, or converted from existing interior spaces like garages or attics. Exact pricing confirmed free on the call.
Frequently asked in Boulder
What is the cost of an ADU in Boulder?
What are ADU rules in New Hampshire?
Can I get an ADU quote in Boulder?
Are prefabricated ADUs a good option in Boulder?
What is the best ADU to build?
What are local ADU services in Boulder?
Local ADU services in Boulder mean working with pros who know the area well. They understand Boulder's specific zoning laws and building requirements. This ensures a smoother, more compliant process from start to finish. They offer personalized service for your ADU project. Call us for local expertise.
What are accessory dwelling unit homes?
Accessory dwelling unit homes are properties that include a primary residence and a secondary, smaller living unit (the ADU). This could be a detached cottage in the backyard or an attached suite. They offer flexibility for multi-generational living or rental income. Call us to learn more.
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, Downtown Boulder, Mapleton Hill, Chautauqua Park, Newlands — and every surrounding area.
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