Last updated: September 24, 2026
What affects the price
Building an ADU involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.
About this service
The expense of building an ADU varies based on site preparation, whether you need to run new sewer or electrical lines, and the level of interior customization you choose. Larger custom builds naturally require more materials and labor than simpler conversions. We provide exact pricing confirmed free on the call.
Frequently asked in San Francisco
What are the disadvantages of ADUs in San Francisco?
Disadvantages can include high construction costs in San Francisco, potential challenges with parking, and the complex permitting process. You'll also need to consider how an ADU might affect your property's light, air, and privacy. However, the significant demand for housing often makes the investment worthwhile for many homeowners.
How much does an ADU cost in California?
The cost to build an ADU in California, particularly in a high-cost area like San Francisco, varies greatly. Factors include the size, design, materials, and site preparation needed. Smaller, simpler units might cost less, while more elaborate or multi-story ADUs will naturally be more expensive. A personalized quote is essential for accurate pricing.
What are the rules for ADUs in California?
California has state laws designed to encourage ADUs, often simplifying the approval process. These laws usually address minimum lot sizes, setbacks, and impact fees. San Francisco has its own detailed planning code that complements state regulations, covering aspects like height limits and design review. Consulting with local experts is key.
Is ADU allowed in Maryland?
This page is about San Francisco, California. ADU regulations are specific to each state and local jurisdiction. To determine if an ADU is permitted in Maryland, you must research the laws and ordinances of the specific city or county you are interested in. Local planning departments are the best resource.
What are the rules for ADU in California?
California has state laws designed to encourage ADUs, often simplifying the approval process. These laws usually address minimum lot sizes, setbacks, and impact fees. San Francisco has its own detailed planning code that complements state regulations, covering aspects like height limits and design review. Consulting with local experts is key.
Eligibility and availability can change, so it's important to research current state and local initiatives. A quick call can help you explore potential financial avenues.
Also serving nearby: Daly City · Richmond · San Mateo · Berkeley · Oakland
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of San Francisco — population 808,988; about 17,323 residents per square mile across 46.7 sq mi. ZIP codes covered include 94102, 94103, 94104, 94105, 94107, 94108, 94109, 94110.
Neighborhoods served in San Francisco: Richmond District, Sunset District, Mission District, North Beach, Nob Hill, Haight-Ashbury — and every surrounding area.
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