A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Fairview
ADU construction in Fairview typically costs $180,000 – $420,000 for a detached unit and $120,000 – $280,000 for a garage conversion, with most projects completing in 4 – 9 months depending on your lot and the condition of what’s already there. The single biggest cost driver in Fairview is what your existing structure reveals once walls come open: outdated wiring, slab moisture problems, or zero-lot-line construction that triggers fire code upgrades. We’re Lodgewick ADU San Francisco, and we serve Fairview homeowners with written pricing before any work starts. Call (707) 760-0502 to talk through your lot.
Why Lodgewick ADU San Francisco Is Fairview’s Preferred ADU Builders Company
Fairview homeowners keep calling us for one reason above all: we put every commitment in writing before the first nail goes in. Russ Delmar leads our crew, and he’s walked more Fairview ranch homes than most local contractors. The 1950s-70s stock here has a pattern. Piecemeal additions. Original slab foundations. Detached garages that were never meant to become living space. When we quote a Fairview job, we build allowances into the contract for the things we know we’ll find, because we’ve found them on Hillcrest, on the streets off Fairview Avenue, and throughout the Transit Center corridor.
Every Fairview project runs under The Kingswell Guarantee. That means a written price before work begins, a defined arrival window, a clean job site, and a written guarantee on every build. If the work isn’t right within 365 days, we come back and make it right. No phone tag, no chasing. A live person answers our phones 24/7. That’s the ADU Builders standard we hold ourselves to.
Backyard ADU in Fairview
A Backyard ADU in Fairview is a detached accessory dwelling unit built on your existing lot, and under Ord. 2021-08 you can build up to 1,000 square feet on lots as small as 4,000 square feet. That’s a real advantage here, where the typical lot runs 5,000 – 7,500 square feet and many homeowners assumed they’d never have room. A detached ADU in Fairview typically runs $180,000 – $420,000 depending on size, foundation work, and utility runs. The ordinance also gives you attached ADU options up to 1,200 square feet, which changes the math for a lot of families.
What we see in Fairview backyards matters for your budget. The mild Mediterranean climate sounds forgiving, but wet winters and foggy summers mean a poorly insulated ADU will sweat. Slab foundations on older lots need moisture barriers. We plan for that from day one, not as a change order later. The Kingswell Way means saying the price before the work, showing up in the window given, and leaving the yard cleaner than we found it.
Detached ADU Construction
Detached ADUs give you the most flexibility for layout and rental potential. On Fairview lots with a rear yard and alley access, a detached unit lets you keep the existing home untouched while adding a full one-bedroom or two-bedroom living space.
Garage Conversion ADUs
Converting a detached Fairview garage to an ADU is often faster than building new under the local ordinance. The catch is what’s behind those garage walls. More on that below, because it’s the part most quotes miss.
ADU Construction in Fairview
ADU Construction in Fairview means converting an existing structure or building new on a lot that was never platted for a second unit. Under Fairview’s Local Accessory Dwelling Unit Ordinance, permits are streamlined for ADUs within a half-mile of the Fairview Transit Center, which covers a large share of the city’s older neighborhoods. A full custom ADU in Fairview runs $150,000 – $420,000 depending on whether you’re converting, adding on, or building from scratch. The range is wide because the condition of what you’re starting with is the real variable.
Here’s what actually changes a Fairview ADU quote. A 1960s ranch with original wiring will fail today’s electrical code the moment the inspector sees those walls open. A slab-on-grade garage that’s been damp for decades needs a moisture barrier before it can pass ventilation requirements. These aren’t surprises to us. They’re line items we write into the contract as allowances, priced and approved in writing before we touch anything. Russ Delmar and our crew have been inside enough Fairview garages to know what’s coming.
Prefab and Modular ADUs
For Fairview homeowners who want a faster, more predictable build, we work with established prefab manufacturers like Boxabl and Plant Prefab. These units arrive substantially complete, and our crew handles foundations, utility connections, and finishing work. A prefab ADU in Fairview can shave months off the timeline compared to stick-built.
Studio and Junior ADUs
A studio ADU or Junior ADU (JADU, a smaller unit within or attached to your existing home) fits lots where a full detached unit won’t work. On Fairview’s smaller 4,000-square-foot lots, a JADU inside the existing footprint is often the most economical way to add rental income or space for family.
Trusted Brands We Service in Fairview
We work hands-on with the ADU brands Fairview homeowners ask about most. Plant Prefab and Boxabl for prefab builds, Tuff Shed for structure-in-place conversions, and James Hardie siding for exteriors that hold up to Fairview’s fog and wet winters. Because we work with these manufacturers regularly, we know their tolerances, their lead times, and what inspections they’ll trigger in Fairview. That means fewer surprises on your timeline and a cleaner permit process. We keep relationships with local suppliers tight so materials aren’t the thing that stalls your Fairview build.
Common ADU Builders Problems We See in Fairview Homes
Fairview’s housing stock was built in a specific era, and that era left a signature. Here’s what we find when we open walls in this city:
- Zero-lot-line garage construction: In Hillcrest and other 1960s tract neighborhoods, detached garages often share a wall with the neighbor’s garage. Converting one to an ADU triggers Fairview fire code requiring a one-hour firewall, and often means setting the ADU back an additional 3 feet from the property line. If your original quote didn’t include this, the permit process will.
- Slab-on-grade groundwater wicking: Fairview’s wet winters mean moisture moves up through unsealed concrete slabs. A garage conversion that skips the moisture barrier will fail ventilation code and grow mold inside a season. We install the barrier as standard practice, not as an upcharge.
- Original 1960s electrical: Most Fairview ranch homes still carry the wiring they were built with. Fairview’s permit process requires a full electrical upgrade once walls are open for an ADU. A quote that assumes the old panel and circuits will pass is a quote that will change.
- Irregular floor plans from piecemeal additions: Decades of additions leave Fairview homes with odd junctions and load paths. Integrating an attached ADU means understanding how that original framing actually carries weight. We do structural review before we quote, so the plan holds together.
Pricing for ADU Builders in Fairview, CA
For Fairview specifically, here are the ranges we quote most often. A garage conversion ADU runs $120,000 – $280,000. A detached backyard ADU runs $180,000 – $420,000. A JADU or studio conversion inside or attached to your existing home runs $90,000 – $180,000. The spread comes down to three things: how much of the original structure can be reused, what the walls reveal once opened, and how far utilities need to run from the street. We give you a written, line-item price before work starts, with allowances for the known unknowns like electrical upgrades and moisture barriers. Call (707) 760-0502 to schedule a free estimate and get a real number for your lot.
We Also Serve Cities Near Fairview
Our crews work across the East Bay and beyond. If you’re in San Francisco, Oakland, Hayward, or Richmond, we bring the same written pricing and the same Kingswell Guarantee to your project. You can learn more about our ADU Builders in Fairview service area and how we cover the wider Bay Area.
Serving Fairview, CA - Our Local Coverage Area
We’re based in the Fairview area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About ADU Builders in Fairview
Fairview’s ordinance allows a detached ADU up to 1,000 square feet and an attached ADU up to 1,200 square feet on lots as small as 4,000 square feet. That’s unusually flexible for the Bay Area, and it means many Fairview homeowners who assumed their lot was too small actually qualify for a full one-bedroom or two-bedroom unit. Call (707) 760-0502 and we’ll check your lot against the ordinance for free.
No, not all of them. The one-hour firewall requirement applies when your detached garage shares a wall with a neighbor’s structure, which is common in Hillcrest and other zero-lot-line construction from the 1960s. A freestanding garage with clearance on all sides typically doesn’t trigger that requirement. Call (707) 760-0502 and we’ll tell you what applies to your specific structure.
We install a moisture barrier between the existing slab and the new flooring assembly, and we seal the slab perimeter before framing begins. Fairview’s wet winters make this non-negotiable on older garages. It’s a line item we write into every garage conversion quote, not an afterthought discovered after the flooring goes down. Call (707) 760-0502 for a conversion estimate that includes this work.
Fairview’s building department requires that any structure being converted to living space meet current electrical code, which means the original 1960s panel and wiring have to go. Once walls are open, the inspector will check. We build the upgrade into our allowance from the start, so it doesn’t hit you as a surprise. Call (707) 760-0502 to get a written price that includes what your walls will actually require.
Yes. Fairview’s ordinance streamlines permits for ADUs within a half-mile of the Transit Center, which covers a significant portion of the city’s residential neighborhoods. If your home is in that zone, your permit can move noticeably faster than projects elsewhere in the Bay Area. Call (707) 760-0502 and we’ll check whether your address falls in the streamlined zone.
Ready to talk about your Fairview ADU? Call (707) 760-0502 and you’ll get a live person, a straight answer, and a free estimate for your project. The Kingswell Guarantee means the price we put in writing is the price you pay, and if it’s not done right within 365 days, we come back.
Written by Russ Delmar, Owner at Lodgewick ADU San Francisco, serving Fairview, CA.
