Last updated: September 24, 2026
What affects the price
Building an ADU is a custom project, so costs vary based on your specific choices. Site conditions are the biggest factor; if your land requires significant grading, utility extensions, or foundation work, those expenses add up quickly. Choosing high-end finishes, custom cabinetry, or complex roof lines will also push the budget higher compared to a standard design. Prefabricated units often offer predictable costs, while custom site-built structures allow for more flexibility but can be harder to estimate upfront. Exact pricing confirmed free on the call.
About this service
A San Diego-based contractor understands the specific seismic requirements, coastal commission rules, and local ordinances that govern backyard units in the region. You need a local specialist when your property is located within San Diego city or county limits to ensure your project complies with specific regional density mandates. These contractors are experts in navigating the unique permit process required by local authorities to get your project approved and completed correctly. Exact pricing confirmed free on the call.
Frequently asked in Los Angeles
What are the disadvantages of ADUs in Los Angeles?
Potential disadvantages in LA can include navigating complex permitting processes and ensuring adequate parking. Some homeowners worry about increased property taxes or the impact on their current yard space. A free call can help you weigh these factors for your situation.
How much does an ADU cost in Los Angeles?
What are the rules for ADUs in Los Angeles?
Is ADU allowed in Los Angeles?
What are the rules for ADU in Los Angeles?
Rules generally permit ADUs on most single-family residential lots, with specific guidelines on maximum square footage and lot coverage. You'll also need to consider fire safety and utility connections. A quick call to a pro will clarify your property's specific requirements.
Also serving nearby: Santa Monica · Inglewood · South Gate · Compton · Torrance
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Los Angeles — population 3,820,914; about 8,120 residents per square mile across 470.5 sq mi. ZIP codes covered include 90001, 90002, 90003, 90004, 90005, 90006, 90007, 90008.
Neighborhoods served in Los Angeles: Santa Monica, Hollywood, Pasadena, Silver Lake, Downtown LA, San Fernando Valley — and every surrounding area.
Areas we serve
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