A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted Garage Conversion Contractor for San Francisco Homeowners
When your garage stops holding cars and starts holding clutter, a garage conversion changes what your property can do. Our team at Lodgewick ADU San Francisco handles full garage conversions across the city, from the Richmond District to Visitacion Valley, turning underused square footage into rental units, in-law suites, home offices, and extra bedrooms. As your Garage Conversion Contractor - San Francisco, we bring local expertise to every project. We’ve been doing this since 2010 as part of the Kingswell family of home-service companies, and we put every commitment in writing before the first tool comes off the truck. That means a written price, a defined arrival window, and The Kingswell Guarantee backing the whole job. If you’re weighing whether a garage conversion makes sense for your San Francisco lot, call (707) 760-0502 and we’ll walk you through the numbers.
Garage Conversion Permit
A garage conversion permit is the city’s written approval to change your garage from a vehicle storage space into habitable living area, and it’s required for nearly every conversion in San Francisco. Without it, you risk fines, a stop-work order, and serious trouble when you try to sell the house. Lodgewick ADU San Francisco pulls the permits for you as part of the project, handles the plan checks with the Department of Building Inspection, and schedules the required inspections at framing, electrical, plumbing, and final stages. Permit fees in San Francisco typically run $2,000 to $6,000 depending on project scope, parcel size, and whether your job triggers school district or transportation impact fees. We include the permit line item in your written estimate, so the price you approve is the price you pay.
Setback and Code Requirements
San Francisco has specific rules about how close a converted structure can sit to property lines, and older garages often sit tighter to the lot edge than current code allows. We review your parcel’s zoning before we design anything, so you don’t pay for plans the city will reject. If your garage is non-conforming, there are often workarounds through the ADU ordinance, and we’ll show you which path applies.
What We Handle for You
We prepare the architectural drawings, submit the permit application, respond to city comments, and post the approved permit on site. You’ll get a copy of every document. When the inspector signs off, we hand you the final permit card and close-out paperwork for your files.
Garage Conversion to Living Space
A garage conversion to living space means transforming the raw shell of your garage, concrete slab and all, into heated, insulated, code-approved square footage that counts as part of your home. This works well when you need a family room, a home gym, a dedicated office, or a media room without adding a new foundation. Lodgewick ADU San Francisco handles everything from subfloor installation over the slab to insulation, drywall, windows, electrical, plumbing, and finish work. Depending on finish level and whether you’re adding a bathroom or kitchenette, a straight garage conversion to living space in San Francisco typically runs $80,000 to $150,000, with higher-end finishes pushing toward $200,000.
Floor, Insulation, and Weatherproofing
Garage slabs sit at or below grade, which means moisture and cold come up through the concrete. We install a vapor barrier and rigid foam or framed subfloor system before any finish flooring goes down. San Francisco’s fog belt, especially out toward the Sunset and Richmond, makes proper wall and ceiling insulation non-negotiable, and we size it to current Title 24 energy standards.
Heating and Cooling Considerations
Most garages were never hooked into the home’s HVAC system, so a true living space conversion usually means extending ductwork or adding a ductless mini-split. We’ll calculate the heating and cooling load for the new room and show you the most practical option, including electric baseboard or radiant floor alternatives for smaller spaces.
Garage to Bedroom Conversion
A garage to bedroom conversion turns your garage into a legal, comfortable sleeping room, and it’s one of the most common requests we get from San Francisco families who’ve outgrown their floor plan. The city requires specific things for any room used as a bedroom: a minimum window size for emergency egress, a closet, proper ceiling height, and a hard-wired smoke detector. A basic garage to bedroom conversion in San Francisco starts around $60,000 to $100,000 depending on whether we’re adding an en-suite bath, upgrading the electrical panel, or cutting new window openings. We’ll tell you exactly what your house needs before we write the contract.
Egress and Natural Light
Every legal bedroom in San Francisco needs at least one window large enough to climb through in an emergency, and that often means cutting a new opening in your garage wall. We handle the structural header, the window installation, and the waterproofing so the opening looks like it was always there. Homes on narrow lots or shared walls may need creative placement, and we’ll work through those constraints with you.
Closet and Storage Solutions
A bedroom isn’t a bedroom without a place to put clothes, and garage walls don’t always cooperate. We build out closets, wardrobe alcoves, and sometimes a small linen storage area depending on your layout. If we’re adding a bathroom, we’ll position the plumbing to keep everything on one wall to reduce cost and demo.
Garage Conversion ADU
A garage conversion ADU is a garage turned into a fully independent accessory dwelling unit, with its own entrance, kitchen, bathroom, and address, and it’s the highest-value conversion option for most San Francisco homeowners. An ADU rents out or houses family separately, which means the city’s rules are stricter: separate electrical metering or submetering, fire-rated separation between the unit and the main house, and a dedicated water heater. A garage conversion ADU in San Francisco typically runs $120,000 to $250,000, with the spread driven by kitchen finish level, bathroom count, and whether you’re working with a prefab shell or full site-built construction. We’ve done dozens of these and know where the inspectors push back.
Kitchen and Bath Design
The kitchen is where ADU budgets go up or down fastest. We’ll show you three kitchen tiers, from an efficient single-wall galley kitchen to a full L-shaped kitchen with an island, and price each one in writing before you commit. Bathrooms in ADUs usually mean a shower, toilet, and vanity on one wet wall, which keeps plumbing costs controlled on San Francisco hillside lots where drainage runs are longer.
Rental Income and Payback
A one-bedroom ADU in San Francisco rents for $2,000 to $3,000 per month depending on neighborhood and finish, which means many homeowners recover their construction cost in five to eight years. We’re not financial advisors, but we can show you what similar converted garages in your district are listing for right now, and we’ll build to the finish level that makes sense for your rental goals.
Garage Apartment Conversion
A garage apartment conversion takes a detached garage, the kind common in San Francisco’s west-side neighborhoods like the Sunset, Parkside, and the Richmond, and turns it into a standalone apartment with full living amenities. For homeowners just across the Golden Gate, a Garage Conversion Contractor - Sausalito handles similar detached structures with comparable foundation challenges. Because detached garages sit away from the main house, they often make cleaner conversions, less fire-rated separation needed, fewer noise concerns, and more design freedom. A detached garage apartment conversion in San Francisco typically runs $150,000 to $300,000 depending on size, foundation condition, and whether we’re building up or out. Lodgewick ADU San Francisco has converted detached garages from the avenues to Portola, and each one starts with an honest look at what the existing structure can support.
Foundation and Structural Work
Old detached garages in San Francisco often sit on unreinforced slabs or even brick footings, and adding a second story or a bathroom means the foundation has to carry more. We bring in a structural engineer when the slab is questionable, and we’ll show you the repair scope in plain language before any concrete gets poured. Some garages need piering or a thickened edge; some are fine as-is, and we’ll tell you which one you have.
Detached vs. Attached Trade-offs
Detached garages give you more privacy but cost more to run utilities to, especially sewer lines on San Francisco lots with long setbacks. Attached garages share walls and meters, which is cheaper but limits your layout. We’ll run both scenarios for your specific parcel and show you the dollar difference before you pick a direction.
Brands We Service
We work regularly with prefab ADU manufacturers and material suppliers, including Plant Prefab and Boxabl, because San Francisco’s tight lots and strict timelines often favor factory-built components. In the East Bay, an Emeryville Garage Conversion Contractor faces similar density constraints and often specifies the same systems. With Plant Prefab units, we handle the site work, foundation, utility connections, and the finish trades, and we know their panel systems well enough to coordinate the crane and the interior build-out without losing weeks to scheduling confusion. Boxabl units are still rare in San Francisco, but we’ve studied their systems and can manage the site preparation and assembly coordination when a homeowner wants that route.
For cladding and exterior finishes that stand up to fog, salt air, and wet winters, we specify James Hardie siding on most of our San Francisco conversions. It’s fiber cement, which means it won’t rot or warp the way wood does within a few blocks of Ocean Beach, and it carries a finish warranty that matches the life of the building. Whether your garage is framed for Hardie, Plant Prefab, Boxabl, or a full custom build, we can handle the project from permits to final paint.
Signs You Need a Pro Right Now
- The garage floor is cracked and settling. If the slab has cracks wider than a quarter inch or one corner has dropped, the structure is moving. Adding walls, plumbing, and a kitchen onto a failing slab means expensive fixes later. We’ll assess the slab before we write any plans, and if it needs repair, that goes in the estimate up front.
- You can see daylight through the garage door gaps. A garage that doesn’t seal means moisture, rodents, and cold air are getting in, and any of those will wreck a finished living space. We’ll replace or remove the garage door entirely and frame in a proper insulated wall, but the seal problem has to be fixed before finish work starts or you’ll be chasing mold for years.
- The electric panel is original to the house. Most San Francisco homes built before 1980 have panels that can’t handle a kitchen, bathroom, and heating load. If your panel is old, unlabeled, or already maxed out, the conversion will need an upgrade or a subpanel. We’ll check it during the estimate and line-item the cost so there’s no surprise.
- There’s water staining on the garage walls or ceiling. Water intrusion kills conversions. Whether it’s a roof leak, a plumbing leak from the house, or groundwater wicking through the slab, the source has to be found and fixed before insulation and drywall go up. Ignoring it means mold inside your walls within a year.
- The garage has no permit history from previous work. If someone finished part of the garage years ago without permits, the city may require you to bring the whole space up to code before approving new work. We deal with this all the time and can often fold the correction work into your conversion scope without a separate demolition phase.
Our Process, Step by Step
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Free on-site walkthrough. We come to your San Francisco property, look at the garage, the lot, the panel, the foundation, and the access. We ask what you want the space to become and we listen. You’ll have a clear sense of feasibility before we leave.
- 2
Written estimate and scope. Within a few days, you get a line-item written price covering permits, plans, site work, construction, and finishes. No “allowances” that balloon later. The number you approve is the number on the contract, and The Kingswell Guarantee covers it.
- 3
Permit and plan approval. We prepare the drawings, submit to the city, and handle every round of comments from the Department of Building Inspection. You don’t chase the permit desk, and you don’t wonder what’s happening. We’ll tell you the status each week.
- 4
Construction with a clean job site. The crew shows up in the window we gave you, in uniform, with background checks on file. We protect the path from the street to the garage, keep debris contained, and leave the property cleaner than we found it at the end of every day.
- 5
Final inspection and handover. When the inspector signs off, we do a walkthrough with you, deliver the written 365-Day Done Right Promise, and explain what’s covered for the full year. If anything isn’t right in that year, we come back and fix it. Free.
How Much Does Garage Conversion Contractor Cost in San Francisco?
A typical garage conversion in San Francisco runs between $80,000 and $250,000 depending on whether you’re doing a simple living space, a bedroom, or a full ADU with kitchen and bath. At the low end, a basic garage to living space conversion with minimal plumbing and one new window starts around $80,000. A full garage conversion ADU with a kitchen, bathroom, separate entrance, and premium finishes lands between $150,000 and $250,000. Detached garage apartments, because of foundation and utility runs, start higher and can reach $300,000.
What moves the number: whether you’re adding a kitchen or bathroom, the condition of your foundation and electrical panel, whether the garage is attached or detached, and the finish level you choose for flooring, cabinets, and fixtures. San Francisco’s labor costs and permit fees add roughly 15 to 20 percent compared to surrounding cities like Daly City or San Leandro, though a Daly City Garage Conversion Contractor may face different zoning trade-offs. To avoid overpaying, get a written line-item estimate, not a lump-sum number, and ask what’s excluded. Our free estimates include permits, plans, and every material line so you can compare apples to apples. Call (707) 760-0502 to schedule yours.
Our Service Area Near San Francisco
Lodgewick ADU San Francisco serves the city proper along with nearby communities including Daly City, San Bruno, Millbrae, San Carlos, and San Rafael. We’ve also completed garage conversion projects in Oakland, Hayward, Richmond, and Martinez, and we know the different permit offices and planning rules in each jurisdiction. If you’re in the East Bay, our Hayward garage conversion team handles projects on that side of the Bay. For most San Francisco properties, we can be on site within a week of your call. To see how your project fits, start at our home page or call (707) 760-0502 directly.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Garage Conversion Contractor in San Francisco
A garage conversion contractor is a licensed builder who handles every part of turning your garage into living space, from permits and plans to framing, electrical, plumbing, insulation, drywall, and finish work. We act as the single point of contact so you’re not coordinating five different trades yourself. Lodgewick ADU San Francisco has been doing garage conversions since 2010, and every project runs under The Kingswell Guarantee. Call (707) 760-0502 for a free estimate and a written price.
A typical garage conversion in San Francisco takes 12 to 20 weeks from permit submission to final inspection, depending on scope and city review times. Simple living space conversions run on the shorter end, while full ADU conversions with kitchens and baths take longer. We’ll give you a written timeline with the estimate, and we’ll update you weekly as the job progresses. If you need a better sense for your specific project, call (707) 760-0502.
Garage conversions in San Francisco range from $80,000 for a simple living space to $250,000 or more for a full detached ADU with premium finishes. The biggest cost drivers are plumbing, foundation condition, and whether you’re adding a kitchen. We provide a written line-item estimate before any work starts, and the price doesn’t change at the door. Call (707) 760-0502 to get your number in writing.
Yes, we work with Tuff Shed structures and other prefab systems when a homeowner wants a faster build or a specific manufacturer’s design. We handle the site preparation, foundation, utility connections, and all finish work so the prefab shell becomes a code-approved living space. We also work with Plant Prefab, Boxabl, and James Hardie materials. Call (707) 760-0502 and tell us what you’re considering; we’ll tell you if it works for your lot.
If you have a garage with water intrusion, a failing foundation, or electrical problems that are getting worse, we can prioritize your project and get a crew out quickly. Structural and water issues shouldn’t wait, especially in San Francisco’s wet winters. Our live answer line is available 24/7, so call (707) 760-0502 any time and a real person will help you figure out next steps.
Every Lodgewick ADU San Francisco project comes with the 365-Day Done Right Promise in writing. If anything isn’t done right within a year of project completion, we come back and make it right at no charge. That’s the Kingswell Guarantee, and it’s delivered in writing before work begins. You’ll have the document in hand at final walkthrough. For questions about what’s covered, call (707) 760-0502.
Clear a path to the garage, move any vehicles out so we can see the full slab, and gather any old permits or plans you have for the house. You don’t need to clean out every box, but we need to see the walls, the ceiling, the panel, and the floor. We’ll handle the rest during the walkthrough. Call (707) 760-0502 to schedule your free on-site estimate.
Schedule Your Garage Conversion Contractor Service in San Francisco Today
You have a garage. You have a need for space. The next step is a written price, a clear timeline, and a builder who answers the phone. Call (707) 760-0502 to schedule your free estimate with Lodgewick ADU San Francisco. We’ll come out, walk the property with you, and hand you a line-item written price before you commit to anything. No pressure, no vague numbers, and no change orders at the door. That’s The Kingswell Guarantee. If you’re still in the research phase, compare what we offer against any garage conversion contractor in San Francisco and call us when you want the straight story.
Written by Russ Delmar, Owner at Lodgewick ADU San Francisco, serving San Francisco homeowners since 2010.
