Adu housing — 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
ADU housing refers to the creation of secondary living spaces on a property you already own. These units are fully functional homes that include a kitchen, bathroom, and living area. People choose this path to provide housing for aging parents, adult children, or to generate extra rental income. It is a practical way to add value to your existing lot while solving a long-term housing need. Exact pricing confirmed free on the call.
Frequently asked in Boulder
What is the ADU cost in Boulder?
Are there affordable ADU options?
How do I get an ADU estimate?
What is a prefab ADU?
What is an accessory dwelling unit for rent?
An accessory dwelling unit for rent is a secondary living space on your property that you lease to tenants. This can provide a consistent source of income. You'll need to comply with local landlord-tenant laws and building codes for rental units. We can help you find builders to create a rental-ready ADU.
What is the accessory dwelling unit permit?
Are there accessory dwelling unit grants available?
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: Downtown Boulder, University Hill, Newlands, Gunbarrel, Table Mesa — and every surrounding area.
Areas we serve
Browse by state, then city.