







A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable Garage Conversion Contractor Across Lakewood
Most garage conversions in Lakewood start with a 1950s slab that is not built for living space. The concrete is thin, there is no rebar, and the city will not sign off on a bedroom or ADU until the foundation is brought up to code. We know this because we have cut into enough Lakewood garage floors to know exactly what is underneath. Fielding ADU Builders handles the permit, the foundation upgrade, the utility panel, and the finish work so you do not have to coordinate six different trades. Call (361) 315-4177 for a free estimate, and we will walk your specific garage before you spend a dollar.
Why Fielding ADU Builders Is Lakewood’s Preferred Garage Conversion Contractor Company

The Garrison Standard is a set of operating rules we have held since 2006, and it starts with a written price before any work begins. You approve the number on day one. That same number appears on the final invoice. No change orders tucked into week three. No “unforeseen conditions” on a foundation that we already know is thin. Lakewood homeowners deal with enough surprises. We remove the pricing surprise entirely.
Our Garage Conversion Contractor team works with prefab and modular platforms like Abodu, Cover, and Dvele, plus conventional builds using James Hardie siding. The method depends on your lot, your budget, and what the City of Lakewood plan check will allow. We have run enough Lakewood permits to know which direction the planner will push before we file.
Every crew member is background-checked and shows up in uniform. You will know exactly who is on your property, and a live person answers our phone 24 hours a day, 7 days a week. Not a voicemail. Not a callback queue. Reed Calloway leads the team, and when you call, you reach a person who can actually answer questions about your project.
Garage Conversion Permit in Lakewood
Getting a Garage Conversion Permit in Lakewood means passing a plan check that pays close attention to the foundation, the electrical panel, and the lot coverage on your property. Most Lakewood homes were built in the 1950s on 5,000 to 6,000 square foot lots, which leaves little room for error when the city calculates your rear-yard coverage. A standard conversion permit package for a 400-square-foot garage typically runs $4,000 to $9,000 in city fees, engineering, and plan preparation, depending on whether a variance is triggered. You will also need a separate electrical permit and possibly a plumbing permit if you are adding a bathroom.
What triggers a variance in Lakewood
Detached garage conversions on the smaller 5,000-square-foot lots frequently exceed the allowed rear-yard coverage once the square footage becomes habitable. When that happens, the city requires a setback variance, which is the city’s written permission to build closer to the property line than the standard rule allows. A variance adds four to eight weeks to the permit timeline and roughly $2,500 to $5,000 in additional fees, drawings, and public noticing.
Plan check reality for 1950s garages
Lakewood’s housing stock came from Lakewood Park, Inc., and most original garages sit on a slab-on-grade or post-and-beam foundation with no continuous footing. The City of Lakewood will not approve a conversion until an engineer stamps a foundation plan that meets current code for habitable space. That means saw-cutting the existing slab and pouring a new 12-inch continuous footing around the perimeter, plus a stem wall. Contractors who skip this step and pour a thin cap over the original slab will fail the plan check and the homeowner pays twice.
Garage Conversion to Living Space in Lakewood

A Garage Conversion to Living Space in Lakewood is the fastest way to add a bedroom, home office, or rental unit without changing the footprint of your house. Depending on the condition of your garage and the finish level you want, the work typically runs $85,000 to $165,000 for a full conversion with a bathroom and kitchenette. That includes the foundation upgrade, drywall, insulation, electrical subpanel, flooring, windows, and HVAC. A basic conversion without plumbing lands closer to $65,000 to $95,000.
From garage to ADU
When the living space includes a bathroom, a kitchen, and a separate entrance, Lakewood treats the project as an accessory dwelling unit rather than a simple interior remodel. Our crew recently converted a detached two-car garage on Graywood Avenue in the Lakewood Park neighborhood into a 400-square-foot ADU. The original 1951 slab was only 4 inches thick with no rebar, so we had to saw-cut and pour a new 12-inch continuous footing and stem wall before framing could begin. We used James Hardie siding to match the existing house and installed a ductless mini-split, and the final inspection passed only after we added a dedicated 100-amp subpanel because the main panel was a 1950s 60-amp fuse box that could not support the new load.
Electrical panel constraints
Many Lakewood homes still run on 60-amp or 100-amp main panels installed when the house was built. A garage conversion with a mini-split, lighting, outlets, and appliances will almost always require a subpanel or a full service upgrade. That is a real line item, not a surprise we spring on you mid-project. A 100-amp subpanel install typically adds $2,800 to $4,500 before any panel replacement. We price it in writing before we start, so you know the panel cost on day one.
Trusted Brands We Service in Lakewood
Lakewood homeowners often ask whether a prefab ADU will pass local plan check, and the answer depends on the platform. We work directly with Abodu, Cover, and Dvele, and we know which of their models clear Lakewood’s foundation and setback requirements faster than others. For conventional builds, we stock and install James Hardie siding to match the original exterior profiles common on Lakewood Park tract homes. Quick access to local suppliers in the South Bay keeps material lead times short, and we order panels, footing forms, and siding before the permit is even issued so the job is not waiting on parts.
Common Garage Conversion Contractor Problems We See in Lakewood Homes
- Thin 1950s slabs with no rebar. The original garage floors on Lakewood’s tract homes were poured for parking cars, not for people to live on. A proper conversion requires saw-cutting and pouring a new continuous footing, and any contractor who skips this will fail inspection.
- Undersized electrical panels. The original 60-amp fuse boxes on Lakewood’s 1950s houses cannot carry the load of a converted living space. You need a dedicated subpanel, and sometimes a full service upgrade, before the city will sign off.
- Lot coverage and setback triggers. Lakewood’s small 5,000-square-foot lots leave almost no margin for error. A detached garage conversion that pushes your rear-yard coverage over the limit means a variance, which adds time and money and has to be planned for before you start.
- Water and sewer line conflicts. The original garage slab often sits directly over or adjacent to the main sewer lateral, which means the plumbing rough-in for a bathroom requires trenching through the slab and sometimes rerouting the lateral. That is a Lakewood-specific condition we account for in our estimate up front.
Pricing for Garage Conversion Contractor in Lakewood, CA
A realistic garage conversion in Lakewood runs $85,000 to $165,000 for a full unit with a bathroom and kitchenette, and $65,000 to $95,000 for a simpler living space without plumbing. The biggest cost drivers here are the foundation upgrade, the electrical panel work, and whether a variance is required for your lot. Permit fees alone run $4,000 to $9,000. Every estimate we write includes the foundation, the panel, the permits, and the finish work as separate line items, so you can see exactly where your money goes. Call (361) 315-4177 to schedule a free estimate, and we will put the full price in writing before any work starts.
We Also Serve Cities Near Lakewood
Fielding ADU Builders handles Garage Conversion Contractor in Lakewood and the surrounding South Bay cities, including Lomita, Torrance, Carson, and Rancho Palos Verdes. The permitting rules and foundation conditions change from city to city, and we know the differences. If you own a home in a neighboring city and want the same written-price, Garrison Standard approach, call us and we will scope it properly.
Serving Lakewood, CA - Our Local Coverage Area
We’re based in the Lakewood 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 Garage Conversion Contractor in Lakewood
Yes, in nearly every case. A 1950s garage slab in Lakewood is typically 4 inches thick with no rebar and no continuous footing, which does not meet current code for habitable space. The city will require an engineer-stamped foundation plan with a new continuous footing and stem wall before framing can begin. Call (361) 315-4177 if you want us to check your specific slab.
Plan check at the City of Lakewood typically runs four to eight weeks for a straightforward conversion with a foundation upgrade. If a variance is required for lot coverage or a rear setback, add another four to eight weeks for the public noticing and hearing process. We handle all submittals, corrections, and resubmittals, so you are not tracking city emails. Call (361) 315-4177 for a realistic timeline on your specific lot.
The foundation upgrade is almost always the biggest single line item, followed closely by the electrical panel work. Saw-cutting and repouring a new continuous footing and stem wall for a two-car garage typically runs $12,000 to $22,000 depending on access and soil conditions. A panel or service upgrade adds another $2,800 to $6,500. We put both in writing before work starts so the final invoice matches the approved number. Call (361) 315-4177 for an exact quote.
It depends on your lot size and the square footage of the garage. Most Lakewood detached garages are in the 400 to 480 square foot range, and on a 5,000-square-foot lot, that conversion almost always pushes rear-yard coverage past the limit. When that happens, the variance is a hard requirement, not an option. We can measure your lot and tell you within a day whether a variance applies before you commit to anything. Call (361) 315-4177.
Lakewood does not require a separate address, and a separate electric meter is optional for most ADUs. What the city does require is a dedicated subpanel for the converted space, and often a service upgrade if your main panel is undersized. We handle the panel work as part of the conversion scope, and we will tell you in writing what your existing panel can support. Call (361) 315-4177 for a free assessment.
When you are ready to move forward, call (361) 315-4177. We will schedule a free walkthrough of your garage, check the slab, the panel, and the lot coverage, and hand you a written price before any work starts. The Garrison Standard covers workmanship defects for 365 days. If something fails, we come back and make it right at no charge.
Written by Reed Calloway, Owner at Fielding ADU Builders, serving Lakewood and the South Bay since 2006.



