ADU Contractor Orange County

Most ADU projects in Orange County range from $150,000 to $350,000 depending on size, type, and finish level. A garage conversion typically starts around $120,000–$180,000. A detached ADU of 600–800 sq ft usually runs $200,000–$280,000. We provide a fixed-price proposal after a site visit so you know exactly what you're committing to.

From our first site visit to handing you keys, plan on 8–14 months total. Permit approval alone takes 3–6 months depending on the city and complexity. Once permits are issued, active construction runs 4–6 months. We track permit status for you and keep you updated throughout — no chasing required.

Yes — completely. We prepare and submit all permit documents, coordinate with your city's building department, respond to plan check corrections, and schedule all inspections. You never have to step inside a permit office. This is included in every ADU project we take on.

In most Orange County cities, yes. Garage conversions are typically the most cost-effective ADU option since the structure already exists. We assess the foundation, existing electrical and plumbing, and structural walls to determine what's needed. Most garage conversions qualify as a JADU (Junior ADU) up to 500 sq ft or a standard ADU depending on the space.

We build ADUs throughout Orange County including Garden Grove, Anaheim, Santa Ana, Huntington Beach, Irvine, Fullerton, Orange, Westminster, Fountain Valley, Costa Mesa, and surrounding cities. Each city has slightly different requirements — we know them all.

An ADU (Accessory Dwelling Unit) is a fully independent unit with its own kitchen, bathroom, and entrance, up to 1,200 sq ft. A JADU (Junior ADU) is converted from existing space like a garage and is limited to 500 sq ft. An SB9 unit is created by splitting your lot or adding a second primary dwelling on an eligible single-family lot. We handle all three.

Yes, but only the value of the new ADU is reassessed — not your entire property. Your existing home's assessed value stays the same. The added tax is typically far less than the rental income the ADU generates.

Yes. Once we obtain your Certificate of Occupancy, the unit is legal to rent. Many of our clients cover their entire mortgage payment with ADU rental income.

Not necessarily. For standard ADU packages, we coordinate design and structural engineering in-house. If your project requires a fully custom design, we can refer you to architects we have worked with or work from plans you already have.

Everything from site assessment and design coordination to permit submittal, full construction, city inspections, and final Certificate of Occupancy. Included: foundation, framing, roofing, electrical, plumbing, HVAC rough-in, insulation, drywall, flooring, cabinetry, fixtures, and exterior finish.