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 Orange County
Garage conversion costs in Orange County typically run $120,000 to $230,000 for a full attached conversion into an ADU with a kitchen and bath, while a simpler garage-to-bedroom without plumbing can fall between $55,000 and $90,000. That’s the honest range based on what we actually see in cities like Anaheim, Garden Grove, and Lake Forest in 2026. Lodgewick ADU Orange County is a Garage Conversion Contractor built on The Kingswell Guarantee: a written price before work begins, a defined arrival window, a clean job site, and a written guarantee on every project. If you’re thinking about converting your garage in Orange County, call (350) 203-6060 and we’ll walk you through the process without any pressure.
Why Lodgewick ADU Orange County Is Orange County’s Preferred Garage Conversion Contractor Company
Russ Delmar leads Lodgewick ADU Orange County, part of the Kingswell family of home-service companies established in 2010. Our crews know Orange County neighborhoods the way a local should: the tract-home layouts of Garden Grove, the HOA-driven design standards in Irvine’s Great Park, the small-lot challenges in Westminster, and the setback rules in Anaheim. When a homeowner calls us about a garage conversion in Orange County, they’re talking to people who have already worked on similar homes nearby. That local familiarity means fewer surprises when we open up walls built in the 1960s, 1970s, or 1980s.
Every Lodgewick project operates under The Kingswell Guarantee. We put a written price in your hand before any work starts, not a verbal estimate that drifts upward later. Our technicians arrive in the window we give you, background-checked and in uniform, so you always know who’s on your property. And the 365-Day Done Right Promise means if the work isn’t right, we come back and make it right, in writing, on every job. A live person answers our phones 24/7, not a voicemail loop. That matters when you have a question about your garage conversion at 8 p.m. on a Tuesday.
Garage Apartment Conversion in Orange County
Garage Apartment Conversion in Orange County is one of the highest-return projects a homeowner can take on right now. Orange County is the epicenter of California’s ADU construction boom, with cities like Santa Ana and Anaheim issuing thousands of permits since 2020, driven by high housing costs and state mandates such as SB 9 and AB 68 that override local restrictions. A garage apartment conversion turns an underused garage into a rentable unit or a private space for family, often with the highest per-square-foot return of any home improvement in the county. Depending on scope, a full garage apartment conversion in Orange County typically runs $120,000 to $230,000, while a garage-to-bedroom conversion without a kitchen or bath sits in the $55,000 to $90,000 range.
Attached Garage Conversions
Attached conversions are common in Orange County’s suburban tracts because the garage shares walls and roof with the house, which reduces framing costs. But the shared wall also means we need to address fire separation, insulation, and sound transfer properly. Older homes in Garden Grove and Fullerton often have single-layer drywall and no insulation on that shared wall, so we open it up and rebuild to current code.
Detached Garage Conversions
Detached garages give you more design freedom and often make better rental units because renters get a fully separate entrance. On larger Orange County lots, a detached garage can become a full ADU with its own address and utility connections. Cities like Costa Mesa and Lake Forest have streamlined the process for detached ADUs under state law, though the foundation and utility trenching typically add $25,000 to $50,000 compared to an attached conversion.
Garage Conversion Permit in Orange County
Garage Conversion Permit in Orange County is the step where projects stall when the contractor doesn’t know the local rules. Every city in Orange County issues its own permits, and the requirements are not identical: Santa Ana has specific lot-coverage calculations for lots under 5,000 square feet, while Irvine requires HOA architectural review before the city will even look at your plans in Great Park neighborhoods. We handle the permit set, the energy calculations, the structural drawings, and the HOA paperwork where required. You should budget $4,000 to $12,000 for engineering, permit fees, and school district fees depending on your city and project size.
Code Upgrades That Trigger
When you convert a garage built in the 1960s through 1980s in Orange County, opening the walls usually triggers a series of mandatory upgrades. Electrical panels often need replacement because the existing 100-amp service won’t support a new kitchen and bath. Insulation, smoke and carbon monoxide detectors, and tempered glass at doors all come into play. We write these allowances into your contract before we start so a code trigger never becomes a surprise bill later.
HOA Review in Irvine
In Irvine’s Great Park neighborhoods, HOA rules require ADU designs to match the main house’s exterior materials and colors, so garage conversions here often need custom siding, trim, and color matching that would not be required in neighboring cities like Santa Ana or Anaheim. Failing to submit HOA architectural review before starting a garage conversion results in a stop order from the HOA, forcing the owner to redo exterior finishes to match the main house. We’ve handled enough Great Park projects that we plan for this from day one.
Trusted Brands We Service in Orange County
We work with the ADU brands that hold up in Orange County’s climate and pass local building codes. Abodu and Cover prefab units are popular locally because their designs compress construction time and their engineering packages satisfy most Orange County jurisdictions. Dvele offers panelized systems that work well on tighter lots in Garden Grove and Westminster where crane access matters. We keep close relationships with these manufacturers’ engineering teams so plan revisions and field questions get answered fast for Orange County customers, not routed through a national call center for a week.
Common Garage Conversion Contractor Problems We See in Orange County Homes
- Aluminum wiring with failing insulation. Tract homes built in the 1960s and 1970s across Orange County often have aluminum branch circuits. By the time we open the walls, the insulation is brittle and the connections are overheating. This must be rewired or pigtailed to copper before any drywall goes up.
- Slabs with no moisture barrier. Many older Orange County garages were poured directly on grade with no vapor barrier. Efflorescence on the concrete and musty smells are the tell. We install a 6-mil barrier and seal the slab before flooring goes in.
- Subterranean termite damage. Orange County soil is prime habitat for subterranean termites. Contractors who skip the termite inspection end up finding active infestation only after drywall is removed, causing a stop-work order and a costly secondary treatment. We inspect before we quote and again when walls are open.
- Setback and lot-coverage surprises. Because many older homes in Garden Grove and Westminster are on smaller lots, some builders try to convert a garage without verifying the city’s specific setback or lot-coverage rules, leading to permit denial after demolition begins. We check zoning and lot coverage before you spend a dollar.
Pricing for Garage Conversion Contractor in Orange County, CA
Here are the numbers we give Orange County homeowners on the first call. A garage conversion to a bedroom or office runs $55,000 to $90,000. A full attached garage ADU with kitchen and bath runs $120,000 to $200,000. A detached garage conversion into a full apartment runs $150,000 to $230,000 depending on foundation work and utility runs. What moves those numbers: whether we’re rewiring aluminum circuits, replacing the slab, matching HOA exterior materials in Irvine’s Great Park, or running new sewer lines across a long backyard. We write every allowance into your contract and any surprise found after demo gets priced and approved in writing before we touch it. Call (350) 203-6060 for a free estimate with a line-item written price, no vague ranges.
We Also Serve Cities Near Orange County
Our Orange County crews cover the whole county, including Anaheim with its older single-story tracts, Costa Mesa’s midcentury homes, Fullerton’s 1960s subdivisions, and Lake Forest’s larger Saddleback Valley lots. If you’re in a city near Orange County and considering a garage conversion, call (350) 203-6060 and ask for a free estimate. We’ll tell you honestly whether your garage is a good candidate before you spend a dollar.
Serving Orange County, CA - Our Local Coverage Area
We’re based in the Orange County 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 Orange County
Yes. In Irvine’s Great Park neighborhoods, HOA architectural review is required before a garage conversion can proceed, and the HOA rules require ADU exterior materials and colors to match the main house. We handle the HOA submittal process, including material schedules and color samples, so your project doesn’t stall at the HOA step. Call (350) 203-6060 to talk through your specific HOA requirements.
The most common code upgrades are electrical panel replacement, rewiring aluminum circuits, adding insulation to current Title 24 levels, smoke and carbon monoxide detectors, tempered glass at doors, and seismic strapping on the water heater. We write these allowances into your contract before we open the walls so you see the full price on day one. Call (350) 203-6060 for a written estimate that includes every triggered upgrade.
Subterranean termites are active throughout Orange County’s soil, and older garages often have undiscovered damage in the bottom plate and wall studs. We inspect for termite activity before quoting and again after the walls are open. If we find active infestation or damage, we stop and price the treatment and repair in writing before any work proceeds, so there’s no stop-work order later. Call (350) 203-6060 to schedule an inspection.
Maybe. Santa Ana’s specific lot-coverage and setback rules apply to lots under 5,000 square feet, and a garage conversion may reduce your lot coverage enough to comply, but the city reviews each case individually. We check your lot’s specific zoning, setback, and coverage requirements before demolition begins so you never face a permit denial after work has started. Call (350) 203-6060 and we’ll review your lot for free.
We write allowances into your contract for the known unknowns on older Orange County garages: rotted bottom plates, slab moisture, aluminum wiring, and termite damage. When we open up a wall and find something outside those allowances, we stop work, show you the condition, and give you a written price for the fix before we touch it. On a 1970s tract home in Garden Grove, our crew opened up the garage walls and found the original wiring was aluminum with failing insulation and the slab had no moisture barrier. We rewired the entire space to current code, installed a 6-mil vapor barrier, and replaced a rotted bottom plate before closing up, work that added about two weeks but was all priced and approved in writing first. That’s the Kingswell Way. Call (350) 203-6060 to start your garage conversion with a written price from Lodgewick ADU Orange County.
Call (350) 203-6060 for your free estimate. A live person answers, 24/7. We’ll schedule a visit, walk your garage with you, and hand you a written line-item price before any work starts.
Written by Russ Delmar, Owner at Lodgewick ADU Orange County, serving Orange County since 2010.
