Best accessory dwelling unit — San Diego, 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
Frequently asked in San Diego
What are the disadvantages of ADUs in San Diego?
Potential disadvantages include the initial investment and ensuring the ADU complements your existing home and lot. You'll also need to consider any increased utility costs. However, the benefits often outweigh these for San Diego homeowners.
How much does an ADU cost in California?
What are the rules for ADUs in San Diego?
San Diego has specific regulations for ADUs, including size limits, setback requirements, and parking rules. It's crucial to work with professionals familiar with these city ordinances. We can help you navigate the process.
Is an ADU allowed in California?
How do I find the best accessory dwelling unit service in San Diego?
Also serving nearby: El Cajon · Chula Vista · San Marcos · Escondido · Carlsbad
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of San Diego — population 1,388,320; about 4,257 residents per square mile across 326.1 sq mi. ZIP codes covered include 92101, 92102, 92103, 92104, 92105, 92106, 92107, 92108.
Neighborhoods served in San Diego: North Park, Hillcrest, La Jolla, Coronado, Point Loma — and every surrounding area.
Areas we serve
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