Accessory dwelling unit grants — Costa Mesa, CA
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.
About this service
These are financial programs offered by local or state governments to help homeowners cover some costs of building a secondary unit. You might need one if you want to create housing but need help with the initial investment. Availability varies by region and specific eligibility requirements. We can help you identify if you qualify for local assistance during our consultation. Costs depend on your site size and design choices; exact pricing confirmed free on the call.
Frequently asked in Costa Mesa
Where can I find an accessory dwelling unit contractor in San Diego?
Are prefab ADUs a good option for Costa Mesa?
What is ADU construction in Costa Mesa?
What makes an ADU the 'best' for my property?
What is ADU housing in Costa Mesa?
ADU housing in Costa Mesa refers to secondary, independent living units built on a single-family lot. These units are designed to provide complete living quarters, including a kitchen, bathroom, and sleeping area. They can be attached to the main house or be detached structures like backyard cottages or garage conversions. ADUs offer flexibility for guests, family, or rental income. Call us to explore ADU housing options for your property.
What does 'accessory dwelling unit' mean in Costa Mesa?
In Costa Mesa, an 'accessory dwelling unit' (ADU) means a secondary, independent living space on a single-family home lot. It's essentially a smaller, separate dwelling that can be attached to or detached from the main house. ADUs are designed to offer full living amenities. They are a popular way to add rental income or accommodate family members. Call us to learn more about ADUs in Costa Mesa.
Is accessory dwelling unit New Hampshire relevant to Costa Mesa?
Also serving nearby: Santa Ana · Huntington Beach · Westminster · Irvine · Garden Grove
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Costa Mesa — population 108,354; about 6,855 residents per square mile across 15.8 sq mi. ZIP codes covered include 92626, 92627, 92628.
Neighborhoods served in Costa Mesa: Mesa Verde, South Coast Metro, College Park, Westside Costa Mesa, Eastside Costa Mesa — and every surrounding area.
Areas we serve
Browse by state, then city.
California (3)
All of California · Costa Mesa · Jurupa Valley · Santa Maria