Accessory dwelling unit cost — Concord, CA
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
Total costs are influenced by the complexity of your site, the square footage of the unit, and the specific utility upgrades needed to support a new home. Choosing between a prefab unit and a custom build also changes your bottom line. We provide exact pricing confirmed free on the call.
Frequently asked in Concord
How can I get an accessory dwelling unit rental in Concord?
What are the options for a detached accessory dwelling unit?
Can I get a prefabricated accessory dwelling unit in Concord?
Yes, prefabricated accessory dwelling units are an option in Concord. These units are built off-site and then transported and assembled on your property. This can sometimes speed up the construction timeline. Pros will ensure the prefab unit meets local building standards and is properly installed. We can help you find these solutions.
How do I get an ADU quote in Concord?
Are there accessory dwelling unit regulations in New Hampshire that apply here?
What is an accessory dwelling unit near me?
An accessory dwelling unit (ADU) near you is a secondary housing unit on your property. It's a smaller, independent living space with its own kitchen, bathroom, and bedroom. ADUs can be attached to your main home or be a separate structure in your backyard. They are a great way to add living space or rental income. We help you find local pros.
What are 'homes with mother in law suites'?
'Homes with mother-in-law suites' are essentially homes that already have an ADU built in. This suite is a self-contained living space, often with its own entrance, kitchen, and bathroom, designed for extended family members or as a rental unit. It offers privacy and independence for its occupants. We can help you build one.
Also serving nearby: Antioch · Vallejo · Berkeley · Oakland · Richmond
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Concord — population 122,315; about 4,001 residents per square mile across 30.6 sq mi. ZIP codes covered include 94518, 94519, 94520, 94521, 94522, 94524, 94527, 94529.
Neighborhoods served in Concord: Downtown Concord, North Concord, East Concord, Willow Pass — and every surrounding area.
Areas we serve
Browse by state, then city.