Modular accessory dwelling unit — 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
A modular ADU is built in a climate-controlled factory and then transported to your property for assembly. You would choose this route if you want a faster build time and less construction mess in your yard compared to traditional on-site building. Prices fluctuate based on customization options, transportation distance, and site preparation needs. These units are efficient, but the foundation must be ready before delivery. Exact pricing confirmed free on the call.
Frequently asked in Boulder
What's the best ADU for my Boulder property?
Are there ADU services in Boulder, Colorado?
When should I consider an emergency ADU in Boulder?
What are accessory dwelling unit services?
What is an accessory dwelling unit (ADU)?
What is the accessory dwelling unit construction cost in Boulder?
Can I get accessory dwelling unit homes 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: Newlands, Table Mesa, Whittier, Mapleton Hill, Chautauqua — and every surrounding area.
Areas we serve
Browse by state, then city.