







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 Midway City
A garage conversion in Midway City typically runs $85,000 – $165,000 for a complete permitted ADU, depending on whether you’re converting an attached garage or a detached 1950s structure that needs seismic work. Most projects take 3 – 5 months from permit submittal to final inspection. If you’re on a 5,000 – 6,000 sq ft R-1 lot near Bolsa Chica Road or Beach Boulevard, a garage conversion is usually the fastest legal path to an accessory dwelling unit on your property. Call (350) 203-6060 and we’ll walk your specific lot and structure before you spend a dime.
Key Takeaways for Midway City Homeowners
- Midway City is unincorporated Orange County, so your garage conversion permit runs through OC Public Works, not Westminster City Hall. That changes the review timeline and the code triggers.
- Most 1950s Midway City garages have original 60 – 100 amp panels. A conversion almost always triggers a 200-amp service upgrade, and that’s a known cost you should see in writing before walls open.
- Our contracts include written allowances for galvanized repipe and seismic shear anchors, so the price doesn’t move when inspection day arrives.
- Every Lodgewick project includes the 365-Day Done Right Promise: if the work isn’t right, we come back and make it right. That commitment is in writing before we start.
Why Lodgewick ADU Orange County Is Midway City’s Preferred Garage Conversion Contractor Company
We’ve worked enough conversions along McFadden Avenue and the streets off Bolsa Chica Road to know exactly what hides inside a 1958 garage: corroded galvanized supply lines, undersized framing, slabs poured without rebar, and panels that can’t carry a modern kitchen. That local familiarity means our written quotes actually hold. Russ Delmar, who leads Lodgewick ADU Orange County, insists on walking every Midway City job before pricing it. Not a drive-by. An actual walkthrough with a tape measure.
Midway City homeowners call us because they’ve been quoted one price and handed another after demo. We don’t do that. The Kingswell Guarantee means a written price before any work starts, a defined arrival window, a clean job site, and a written guarantee on every project. A live person answers our phones 24/7, so when you call at 9pm with a question about your permit status, you get a person, not a voicemail loop.
Our Garage Conversion Contractor team has handled attached conversions, detached teardowns, and second-story additions throughout Midway City. We know which lots along the unincorporated corridors have the R-1 setbacks that allow a two-story ADU up to 1,200 sq ft, and which ones force a single-story footprint. That’s the kind of knowledge that saves you $20,000 in redesign fees before you even break ground.
Garage Apartment Conversion in Midway City

A garage apartment conversion in Midway City means turning an existing garage structure, attached or detached, into a legal dwelling unit with its own kitchen, bathroom, sleeping area, and often a separate entrance. On Midway City lots where the 1950s detached garage sits behind the house off an alley access, this is frequently the most cost-effective way to add rentable square footage without sacrificing yard space. A full garage apartment conversion here runs $95,000 – $165,000 when you factor in the county-mandated upgrades that come with opening a 70-year-old structure.
What the Job Actually Involves Here
On a typical Midway City conversion, we’re pulling the old garage door and framing in a wall with windows and a proper entry. The slab usually stays, but we verify thickness and add seismic anchors before anything else happens. Electrical gets a new subpanel, plumbing gets rerouted off the corroded galvanized lines, and insulation goes in every wall cavity before drywall. OC Public Works will require smoke and carbon monoxide detectors, egress windows in any bedroom, and a separate address for the new unit.
Detached vs. Attached on Your Lot
An attached garage conversion on a Midway City ranch home is generally less expensive per square foot because you share one wall, roofline, and sometimes the main panel. A detached conversion gives you more privacy and rental flexibility, but it carries a bigger price tag for trenching utilities across the yard and upgrading the separate structure to full dwelling code. Both paths are viable here, and we’ll tell you honestly which one makes sense on your specific lot.
Garage Conversion Permit in Midway City
A garage conversion permit in Midway City runs through Orange County Public Works, not a city building department, because the community is unincorporated. Plan check for a standard garage ADU here typically takes 4 – 8 weeks, and the county reviews structural drawings, Title 24 energy calculations, and site plans for setback compliance before issuing the permit. Permit fees for a garage conversion in Midway City generally land between $4,000 and $9,000 depending on the scope, and that’s before any school district fees or utility connection charges.
What the Permit Triggers on a 1950s Garage
Here’s where Midway City conversions get expensive if your contractor didn’t warn you. Once walls are open, OC Public Works requires the existing structure to meet current code. That means a 200-amp panel upgrade if you’re still running the original 60-amp service, seismic shear wall anchors on the old slab, and replacement of any galvanized supply lines that fail inspection. We write those allowances into the contract on the front end, so the number you sign is the number you pay. No change orders at the door. No surprises after demo.
No HOA, but County Rules Still Apply
Most Midway City parcels are R-1 with no HOA, which removes one layer of approval but does not remove code compliance. Setbacks, lot coverage, and parking replacement requirements all come from the county, and they’re stricter than most people expect. A detached garage conversion still needs to meet the same fire separation and utility standards as a new build. We handle the full permit package, from site plan to structural calcs, so you don’t have to translate county code.
Common Garage Conversion Contractor Problems We See in Midway City Homes
- Galvanized plumbing that crumbles on demo. Midway City’s hard water eats original 1950s galvanized supply lines from the inside out. We’ve seen pipes that looked fine from the outside crack open the moment a fitting was touched. Budget for a repipe in the conversion scope, not as an “unforeseen condition” after drywall is up.
- Subpanels that can’t carry a modern ADU. The original 60-amp service on a 1958 ranch home in Midway City was sized for a garage door opener and a light bulb, not a kitchen with a range, microwave, and mini-split HVAC. Converting that garage to a dwelling triggers a mandatory service upgrade, and that’s a $4,000 – $8,000 line item you should see in writing before signing.
- Slab foundations with no seismic anchorage. Most 1950s Midway City garage slabs were poured as a parking pad, not a dwelling foundation. OC Public Works requires shear wall anchors and, in many cases, an engineering letter verifying the slab can support the new load. Contractors who skip this step fail inspection and stall your project for months.
- Moisture intrusion from the marine layer. Midway City sits close enough to the coast that morning overcast and damp air are a year-round fact. Garage slabs without a proper vapor barrier wick moisture up through the concrete, which leads to mold under flooring and rust on door thresholds. We address this with a moisture barrier, proper ventilation, and building assemblies rated for coastal humidity.
Pricing for Garage Conversion Contractor in Midway City, CA
A basic attached garage conversion into a studio ADU in Midway City starts around $85,000. A one-bedroom apartment conversion in a detached 1950s garage runs $110,000 – $145,000. A two-bedroom conversion with a full kitchen, upgraded electrical, new sewer line, and James Hardie siding exterior can reach $165,000. The wide range comes down to what’s hiding in your specific structure: panel age, slab condition, plumbing material, and whether the roof needs replacement to meet current code.
We give you a written, line-item price before any work starts. Not a range, not an estimate, not a “we’ll see how it goes.” A fixed number with allowances for the known unknowns. Call (350) 203-6060 for a free estimate on your Midway City garage conversion, and we’ll walk the structure together before you commit to anything.
Trusted Brands We Service in Midway City
We work with the ADU systems that hold up to Midway City’s coastal humidity and hard water conditions. For prefab and panelized conversions, we’ve specified Abodu units on tight Midway City lots where a fast build matters and Cover panels when the existing garage footprint needs a custom layout. For exterior finishes that handle the marine layer without constant repainting, we default to James Hardie siding on nearly every conversion we do off Bolsa Chica Road. We keep common components and materials staged for Midway City jobs, which shortens lead time when the county issues your permit and you want to start the same week.
We Also Serve Cities Near Midway City
Our garage conversion crews cover the surrounding Orange County communities, including Costa Mesa, Anaheim, Santa Ana, and Tustin. Each city has its own building department and its own set of code quirks, and we’ve permitted projects in all of them. If you’re on the edge of Midway City, we’ll tell you straight whether your parcel actually falls under OC Public Works or a neighboring city’s jurisdiction.
Serving Midway City, CA - Our Local Coverage Area
We’re based in the Midway City 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 Midway City

It runs through the County. Midway City is unincorporated Orange County, so your garage conversion permit is issued by OC Public Works, not Westminster City Hall, even though Midway City mailing addresses often say Westminster. We’ve permitted enough garage ADUs here that we know exactly which counter to file at and which reviewer will be assigned to your plan check. Call (350) 203-6060 and we’ll confirm your parcel’s jurisdiction before anything gets filed.
We assume they’re corroded and plan for a full repipe in the conversion scope. Midway City’s hard water deposits calcium and magnesium inside 70-year-old galvanized lines until the interior diameter is down to a pencil width and the walls are paper thin. We saw it on a detached garage off Bolsa Chica Road: pipes that looked intact from the outside crumbled at the first fitting during demo. The repipe line item is in our written quote from day one, not added as a change order later.
Almost certainly yes on both counts. A 1950s Midway City home with the original 60-amp or 100-amp panel will need a 200-amp service upgrade to support an ADU with a kitchen and HVAC. And the county will require shear wall anchors and possibly slab verification before the conversion passes structural review. These are not optional upgrades. We price them into the contract before work starts so your final cost equals your signed price. Get your exact number by calling (350) 203-6060 for a free walkthrough.
In many cases, yes. A 220 – 260 sq ft detached garage from the 1950s converts well into a compact studio ADU with a kitchenette, three-quarter bath, and sleeping area. Midway City’s small-lot zoning means this may be the only legal place to add a dwelling unit on your property, and the county allows two-story ADUs up to 1,200 sq ft on many R-1 parcels, so you can go up if you want more space. We’ll tell you honestly if the structure is worth saving or if a teardown-and-rebuild makes more sense on your specific lot.
We install a vapor barrier under any new slab or flooring assembly, use moisture-rated insulation, and design ventilation that moves air through the unit even when windows are closed. Midway City’s morning overcast means the air is damp for hours every day, and a converted garage with poor airflow will grow mold under baseboards and inside closets within a year. Our assemblies meet Title 24 ventilation requirements, and the 365-Day Done Right Promise covers any moisture-related failure in the first year. If something goes wrong, we come back and fix it. Free.
Call (350) 203-6060 today for a free, written estimate on your Midway City garage conversion. Russ Delmar or one of our team will walk your lot, open your garage, and give you a straight number before you spend anything.
Written by Russ Delmar, Owner at Lodgewick ADU Orange County, serving Midway City and surrounding Orange County communities since 2010.




