The Step-By-Step Guide to Building Your First ADU

As housing costs rise and space becomes scarce, particularly in Northern California, auxiliary dwelling units (ADUs) have gained popularity as a creative solution to the affordable housing dilemma.

ADUs, sometimes known as granny flats, backyard cottages, or in-law suites, allow homeowners to add living space to their property. Whether you're looking to accommodate aging parents, generate rental income, or simply expand your living area, building an ADU is a smart investment.

Step 1: Research local regulations. Every city has different rules regarding ADU size, height, setbacks, and parking requirements. Start by checking your city's planning department website.

Step 2: Set your budget. ADU costs in the Bay Area range from $150,000 to $400,000+. Factor in design, permits, construction, landscaping, and utility connections.

Step 3: Choose your design. ADORE Homes offers a range of pre-designed models that can be customized to your needs, saving time and money compared to custom architectural plans.

Step 4: Obtain permits. ADORE Homes manages the entire permitting process, from initial application to final approval, typically completing this phase in 4–8 weeks.

Step 5: Construction and installation. Our modular approach means your ADU is built in a controlled factory environment while site preparation happens simultaneously.

Step 6: Final inspections and move-in. Once installed, final inspections ensure everything meets code. Then it's time to enjoy your new space!