







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 West Covina
Garage conversion work in West Covina typically runs $85,000 to $145,000 for a standard two-car garage turned into a one-bedroom living space with a full bath. That range covers framing, drywall, electrical, plumbing, insulation, flooring, and finish work before permit fees. If you’re searching for a Garage Conversion Contractor who puts the price in writing before any work starts, Fielding ADU Builders serves homeowners across West Covina, from the Shadow Oak area to neighborhoods near the West Covina Mall. Call (361) 315-4177 to schedule a free estimate, and you’ll get a line-item quote you can actually plan around.
Why Fielding ADU Builders Is West Covina’s Preferred Garage Conversion Contractor Company

We’re part of the Garrison Partners family, which has been building to The Garrison Standard since 2006. That standard is straightforward: show up in the window, price in writing, work by the book, leave it clean, and stand behind it for a full year. West Covina homeowners who have already dealt with a contractor who moved the price at the door or left the permit board blank tend to ask sharper questions of their West Covina Room Addition Contractor. We answer them directly.
Every crew member who steps onto your West Covina property is background-checked and arrives in uniform. You’ll know exactly who’s on site. The written guarantee covers workmanship defects for 365 days. If something fails inside that year, we return at no charge and correct it. That’s the entire point of The Garrison Standard, and it applies to every garage conversion we build in West Covina.
Permitting is where West Covina trips up a lot of contractors. The city’s building division enforces its own ADU ordinance, which includes a minimum ceiling height requirement for habitable space and a separate electrical/plumbing permit that the county does not require for unincorporated areas. We know this. We plan for it from day one, which saves you plan-check delays and re-submittal fees. Dispatch and scheduling for West Covina jobs are coordinated from our Los Angeles office, and crews serve West Covina locally.
Garage Conversion Permit in West Covina
A Garage Conversion Permit in West Covina is the city’s formal approval to turn an existing garage into habitable living space, and it involves two separate permit tracks: a building permit for the structural work and a separate electrical/plumbing permit for any bathroom, kitchenette, or laundry hookup you’re adding. West Covina’s building division reviews plans for minimum ceiling height before anything gets approved, which catches a lot of homeowners off guard when their first contractor submits plans that ignore the requirement.
Plan Review and Ceiling Height
West Covina requires that converted garage plans show code-compliant ceiling height for habitable space, even in a standard two-car garage. If your existing garage ceiling sits too low, the plan must include a framing modification, like a 2×6 ceiling joist system, to bring it into compliance. We walk every West Covina project through this review with a local structural engineer so the plans pass the first time.
Separate Electrical and Plumbing Permits
Adding a bathroom to your garage conversion means you cannot rely on the building permit alone. West Covina requires a separate electrical/plumbing permit, and inspections are handled by West Covina’s building division, not L.A. County. Skipping this step because a contractor is used to county rules is one of the most common causes of stop-work orders we see. We pull both permits through West Covina’s online portal and schedule the rough-in inspections before any drywall goes up.
Garage Conversion to Living Space in West Covina

Garage Conversion to Living Space in West Covina means taking an attached or detached garage and turning it into code-compliant, insulated, finished square footage you can actually live in, whether that’s a bedroom, a studio rental, or an Garage Conversion Contractor specialty like a full ADU with its own address. The work involves demolition of the garage door and opener, slab inspection, framing modifications, insulation, drywall, flooring, electrical, and often plumbing.
Attached Garage Conversions
An attached garage conversion in West Covina usually costs less per square foot than a detached one because utilities are closer and the structure already shares a wall with the house. The tradeoff is that the living space has to integrate with the existing roofline and foundation, which sometimes means matching stucco or siding. We recently converted a detached two-car garage into a 420-square-foot living space with a full bath in the Shadow Oak area. The client came to us after their first contractor missed the required ceiling-height note, and we pulled both permits, passed framing and electrical rough-in on the first try, and finished with James Hardie siding to match the main house.
Detached Garage ADU
A detached garage conversion in West Covina gives you more separation between the new unit and the main house, which matters for rental income or multigenerational living. West Covina’s older tract homes often sit on slab-on-grade foundations, and we regularly see moisture or termite issues under the slab that don’t show up until demolition starts. We budget for that in the written price, so you’re not surprised by a change order halfway through.
Trusted Brands We Service in West Covina
We’re fluent with the prefab and panelized systems West Covina homeowners are already researching, including Cover, Dvele, and Boxabl. For conventional builds, we work with James Hardie siding and Tuff Shed-style structures so the finished conversion matches the main house. If you’ve been comparing panelized options against stick-built, we can walk you through the real cost difference in West Covina’s market and recommend the right build method for your lot and budget. We stock local parts and coordinate deliveries so West Covina jobs don’t stall waiting on materials.
Common Garage Conversion Contractor Problems We See in West Covina Homes
- Plans that ignore West Covina’s ceiling-height rule. A contractor used to county rules will submit plans without noting the minimum ceiling height for habitable space, and plan check rejects them. That costs weeks and a re-submittal fee before a single board is cut.
- Skipping the separate electrical/plumbing permit. West Covina requires it when you add a bathroom or kitchen plumbing. A stop-work order on a permitted project is a hard conversation no homeowner should have to have with a city inspector.
- Slab-on-grade moisture and termite surprises. Older West Covina tract homes often hide moisture damage or termite-run sill plates under the garage slab. We test and inspect before framing so foundation work is priced upfront, not discovered mid-project.
- Floor height mismatches between garage and house. Many West Covina garages sit lower than the finished floor of the main house, which means step-down transitions or floor leveling that a first-time conversion contractor forgets to include in the estimate.
Pricing for Garage Conversion Contractor in West Covina, CA
A garage conversion to living space in West Covina runs $85,000 to $145,000 depending on square footage, plumbing scope, and whether the garage is attached or detached. A garage ADU with its own address and full kitchen typically starts around $130,000 and goes up from there. A basic garage-to-bedroom conversion with no plumbing sits at the lower end. Permit fees are separate and paid to the city. The written price you approve before work starts is the number on the final invoice, and that includes the ceiling-height framing, the separate electrical/plumbing permit work, and the slab inspection. Call (361) 315-4177 to schedule a free estimate and get your exact number.
We Also Serve Cities Near West Covina
Our garage conversion work extends beyond West Covina to La Puente, Covina, Baldwin Park, and Azusa. If you’re in one of these nearby cities, the same written-price policy and 365-day guarantee apply. Call (361) 315-4177 and we’ll scope your project the same way we scope work in West Covina.
Serving West Covina, CA - Our Local Coverage Area
We’re based in the West Covina 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 West Covina
You need a West Covina building permit plus a separate electrical/plumbing permit if you’re adding a bathroom or kitchen, and the plans must show the city’s minimum ceiling height for habitable space. Done right, the job includes slab inspection, insulation, drywall, electrical, and finish work. Call (361) 315-4177 and we’ll walk you through the exact sequence for your garage.
West Covina plan review for a garage conversion typically takes three to six weeks when the plans are submitted correctly the first time. The single biggest delay we see is a plan that ignores the ceiling-height rule, so we engineer for that before submittal. Estimates are free; call (361) 315-4177 to get started.
The only thing that changes a written price is a condition hidden behind the walls or under the slab that no inspection could have found, like termite damage in an older tract home or a sewer line routed through the garage floor. We price the common West Covina issues upfront, so the number you approve is the number you pay. We’ll detail any discovery in a written change order before work continues.
Yes. West Covina requires a separate electrical/plumbing permit in addition to the building permit, and it’s common for contractors unfamiliar with the city to skip it. We pull both through West Covina’s online portal and pass the rough-in inspections before drywall. Call (361) 315-4177 for a free estimate that includes both permits in the plan.
We work with Cover, Dvele, and Boxabl panelized systems, plus conventional builds using James Hardie siding and Tuff Shed-style structures. The right system depends on your garage’s footprint, ceiling height, and budget. We’ll give you a straight comparison of options when we scope your West Covina project.
Written by Reed Calloway, Owner at Fielding ADU Builders, serving West Covina through The Garrison Standard.



