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 Oakland
Adding an ADU to your Oakland lot is the single smartest way to create flexible space for family, rental income, or a home office. But the process here comes with a catch: most of Oakland’s housing stock was built before 1940, and opening up walls or digging foundations tends to trigger seismic and electrical upgrades nobody mentioned in the first conversation. That’s the gap we close. We quote ADU projects in Oakland every week, scope the permit-triggered work before pricing, and put every dollar in writing before we start. Call (707) 760-0502 and we’ll walk your specific street and house age before giving you a real number.
Why Lodgewick ADU San Francisco Is Oakland’s Preferred ADU Builders Company
Oakland homeowners keep calling us for the same reason: our written price does not move when the inspector finds something unexpected. Older homes in Rockridge, Temescal, and the flatlands hide things. Knob-and-tube wiring. Unreinforced brick foundations. Framing that supported a 1925 roof but won’t carry a second-story ADU. We scope for those before quoting, write allowances into the contract, and if a surprise does surface, it’s priced and approved in writing before we touch it. That’s the Kingswell Way, and it’s why our ADU Builders team has a strong return-caller rate from Oakland.
The 365-Day Done Right Promise matters here. Every project gets a written guarantee, including a free return visit if the work fails within the year. Not a verbal promise. Paper. And every Oakland job is led by Russ Delmar, who has been building under The Kingswell Guarantee since Lodgewick was founded in 2010.
You’ll also talk to a live person when you call, day or night. No voicemail loop while you’re standing in a house with open walls wondering what the inspector just flagged.
ADU Contractor in Oakland
An ADU Contractor in Oakland handles the full scope from foundation to finish: site prep, seismic bolting, framing, electrical, plumbing, insulation, drywall, and finish work, coordinated with the city’s permit office from day one. Oakland homeowners typically need us when their existing garage has stopped being useful as storage and started looking like a studio apartment, or when the backyard has room for a detached unit but the lot shape is irregular and the house is pre-war. A garage conversion in Oakland generally runs $180,000 to $280,000 depending on seismic work and electrical scope. Detached units run $250,000 to $420,000.
Seismic and Foundation Scope
In Oakland, a contractor who quotes framing without inspecting the foundation is guessing. Most flatlands lots sit on compacted bay fill or older concrete. When we expose a foundation, we check for bolting, shear capacity, and concrete soundness. If shear walls or bolting are required, that line item was already in your allowance.
Panel and Electrical Upgrades
Oakland inspectors routinely require 200-amp service for a new ADU. If the main house still runs on a 100-amp panel or, worse, knob-and-tube, that work gets scoped during our first inspection. We price it in the initial quote, not after framing starts.
ADU Design in Oakland
ADU Design in Oakland has to solve for three things at once: the city’s pre-1940s housing stock, lot shapes that were never meant for a second structure, and the Hayward Fault’s seismic requirements. We design units that fit long, narrow flatlands lots, hillside setbacks in Montclair, and small backyards in North Oakland, then match the structure to the right system. A designed-and-permitted studio ADU in Oakland typically runs $220,000 to $340,000 complete. Design work itself before a permit is filed runs $8,000 to $18,000 depending on the unit type and site complexity.
Designing Around Oakland’s Fog and Sun
Oakland’s cool, foggy summers mean heavy AC is rarely the right call. We design for natural ventilation, operable windows on opposing walls, and passive solar gain for the mornings when the marine layer burns off by noon. Less HVAC, more window placement.
Lot Shape and Setback Compliance
Long narrow lots in Fruitvale and East Oakland often have forgotten side yards that fit a 400-square-foot detached unit if the setbacks are right. We measure first, design second, then file. If the city rejects a setback interpretation, we adjust and refile without a change order to you.
Trusted Brands We Service in Oakland
We install and finish units from manufacturers we’ve worked with hands-on: Abodu, Plant Prefab, and Tuff Shed frames with James Hardie siding. For Oakland lots where a factory-built unit doesn’t fit the setback or soil conditions, we custom-build. What matters is that the brand matches your lot and budget, and that the finish work, foundation, and utility connections are done to Oakland code. We keep local inventory of common hardware and finishing materials for these systems, so warranty calls and punch-list items in Oakland don’t wait on a shipped part.
Common ADU Builders Problems We See in Oakland Homes
- Knob-and-tube wiring discovered behind walls. Most pre-1935 Oakland homes still have some. The city requires replacement before final inspection, and if it wasn’t in your quote, that’s a $15,000 to $30,000 change order. We scope it first.
- Unreinforced masonry foundations on bungalows. Exposing them triggers seismic bolting and shear wall retrofits. We write that allowance into the contract so the price is real before we start.
- Old footings that look reusable but aren’t. In flatlands neighborhoods, 1920s foundations often need bolting before they can carry a new unit. Sometimes they’re sound and save thousands. We test before we promise either way.
- Electrical panel undersized for the new unit. Oakland routinely requires 200-amp service. If the main house panel is 100 amps, that’s a required upgrade. We include it in the first written price.
Pricing for ADU Builders in Oakland, CA
We Also Serve Cities Near Oakland
Our crews work across the East Bay, including Emeryville, San Leandro, Moraga, and Orinda. If you’re in one of those cities, the pricing and permit triggers are close to what you see here, but each city has its own inspector preferences. Oakland is our busiest service area, and we schedule local jobs back-to-back to keep drive time off your invoice.
Serving Oakland, CA - Our Local Coverage Area
We’re based in the Oakland 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 Oakland
Do Oakland ADU permits require upgrading the main house’s electrical system if I have knob-and-tube wiring?
Yes. If the main house has active knob-and-tube wiring, Oakland inspectors will require replacement before they sign off on a new ADU’s electrical connection. The rewire typically runs $15,000 to $30,000 depending on house size and access. We scope this during our first inspection and include it in the written price. Call (707) 760-0502 for an exact quote. Estimates are free.
Can I legally reuse an old foundation from a 1920s ‘in-law’ unit in my Fruitvale backyard?
Often yes, and that can save $8,000 to $20,000 in concrete work. On a Fruitvale lot with a long, narrow backyard, our crew uncovered a forgotten 1920s foundation while excavating for a detached ADU. We reused that foundation, saved the client thousands, and then handled the real issue: the main house’s knob-and-tube wiring, which the city required replaced before the new panel could connect. We had that allowance written in and priced before touching a wire. The catch: old footings usually need seismic bolting and shear wall work once exposed. We test first and tell you if reuse is worth it.
How does the Hayward Fault affect my detached ADU project in Oakland?
Any new detached ADU in Oakland must meet current seismic standards, which means shear walls, bolted foundations, and engineered connections. If you’re building on an existing 1920s foundation, expect a structural engineer’s review and retrofit work. That typically adds $12,000 to $25,000. We include it in the first written price. Call (707) 760-0502 to schedule a free foundation inspection.
Will adding an ADU to my Oakland Craftsman bungalow trigger a whole-house electrical rewire?
Not necessarily the whole house, but if walls we open expose knob-and-tube wiring, Oakland requires replacement in the affected areas plus a panel upgrade to 200 amps. If the wiring is old but insulated, you may only need panel work. We open a wall during scoping, look at what’s actually there, and write the number accordingly. Call (707) 760-0502 for a written quote.
Do Oakland’s cool, foggy summers change how we should design the ADU’s HVAC or ventilation?
Yes. Heavy AC is usually overkill in Oakland. We design for cross-ventilation with operable windows on two sides, ceiling fans, and passive solar for the afternoons when the fog burns off. That keeps mechanical costs down and the unit comfortable in August. Every design gets reviewed against the specific lot orientation and the shade from neighboring houses.
Got a question we didn’t cover? Call (707) 760-0502 and a live person answers, any time. We’ll set up a free on-site estimate and give you a written price before any work starts.
Written by Russ Delmar, Owner at Lodgewick ADU San Francisco. Russ leads the Oakland ADU team and oversees every written price and guarantee that leaves the office.
