







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 Pico Rivera
A garage conversion in Pico Rivera typically runs $85,000 to $145,000 for a full one-bedroom ADU with permits, and most of our jobs finish in 10 to 14 weeks. The price gap comes down to one thing: whether the existing slab can support the build or needs to be saw-cut and re-poured with a proper thickened edge. We work the 1950s and 60s ranch-home tracts along Rosemead Boulevard, Whittier Boulevard, and the San Gabriel River corridor every week, so we know exactly what the city’s plan check will flag before you spend a dollar. Call (626) 657-5541 and we’ll walk your lot, check the slab, and put the real number in writing.

Most Pico Rivera garages were built as two-car stucco boxes on 4-inch non-reinforced slabs with no perimeter footing. That is not a dealbreaker, but it changes the engineering. We do not guess at it. We probe the slab, check the existing roof framing, and tell you what the conversion will actually require before we quote. That is why homeowners here call us instead of a general contractor who has never pulled a Pico Rivera ADU permit.
Why Fielding ADU Pasadena Is Pico Rivera’s Preferred Garage Conversion Contractor Company

We are not a franchise sales operation. Fielding ADU Builders is an independently owned member of the Garrison Partners family, and we have been building to The Garrison Standard since 2006. The standard is simple enough to fit on one page: show up in the window, put the price in writing before any work starts, build by the book, leave the site clean, and stand behind the work for a full year. Every Pico Rivera conversion leaves with a bound compliance package the owner can file with their insurer. That is not something most contractors even think to hand over.
Our crews serve Pico Rivera locally, scheduled through the brand’s Los Angeles office. Every technician is background-checked and arrives in uniform. You know exactly who is on your property. And when you call, a live person answers. Noon or midnight, someone picks up.
The Garrison Code governs everything we build. Written price first. Permits pulled and inspections passed. If something fails inside 365 days, we return at no charge and correct the defect. Reed Calloway runs Fielding ADU Pasadena, and he holds every project to that same standard on this side of the 605. When a plan check comment comes back from the city, we answer it the same day. When an inspector wants a detail changed, we change it and keep moving. No change orders. The number you approve is the number on the final invoice.
Garage Conversion to Living Space in Pico Rivera
Garage Conversion to Living Space in Pico Rivera means taking an under-used mid-century garage and turning it into permitted, conditioned square footage: a family room, a home office, a gym, or a media room. These jobs run $75,000 to $120,000 on average. The first thing we check is the slab. In the tract off Mines Avenue and around Smith Park, we routinely find 4-inch non-reinforced pours with no footing. That slab will not pass plan check as living space unless we saw-cut the perimeter and pour a 12-inch thickened edge before framing interior walls.
Slab and Footing Work
Before any wall goes up, the slab gets evaluated for load. If it is the original non-reinforced pour, we cut it, excavate, and pour a thickened edge with proper rebar. Skipping this step means the first Santa Ana wind event cracks the wall at the old slab joint. We will not build on a slab that cannot carry the load.
Insulation and Ventilation
Pico Rivera’s summers are hot and dry, and an uninsulated west-facing garage wall heats up fast. A conversion that skips proper insulation turns into an oven by 3 p.m. We insulate to current Title 24 standards and design cross-ventilation so the space stays livable through August. That is a code requirement here, not an upgrade.
Garage to Bedroom Conversion in Pico Rivera
Garage to Bedroom Conversion in Pico Rivera usually means adding a permitted bedroom, often for an aging parent or an adult child moving back. A standard single-bedroom conversion with a bathroom runs $85,000 to $130,000. The permit path matters here because Pico Rivera’s planning department treats an unpermitted bedroom as a code violation, and lenders will not finance it. We pull the permit, do the work, and pass the final inspection before we hand you the keys.
Wind Load and Lateral Ties
Pico Rivera sits in a wind zone that requires an 85-mph uplift rating on any new stick framing tied to an existing roof. That means Simpson H2.5A hurricane clips and HDU4 hold-downs are standard on our garage-to-bedroom work. If a contractor quotes you decking over the opening instead of a James Hardie shear wall panel, the plan check will reject it. We spec the shear wall the first time.
Egress and Comfort
A legal bedroom needs a window big enough to climb out of, plus heat, insulation, and a closet. Many Pico Rivera garages have low ceilings and no window on the side wall, so we frame a new opening to meet egress. It is detail work, but it is the difference between a bedroom and a drywalled garage.

Trusted Brands We Service in Pico Rivera
Garage conversions here work best when you match the build method to the existing structure. We are fluent with Abodu and Cover for prefab ADU solutions where the lot and setback allow, and we build conventional additions with James Hardie siding and shear panels where wind-load compliance rules the plan check. For Pico Rivera’s pre-1965 ranch tract, the hard truth is that many detached garages need a conventionally framed conversion with engineered hold-downs, not a flat-pack kit. We carry or order locally, and we know which products the city’s inspectors accept without a fight. Reed Calloway can walk you through the trade-offs in one phone call.
Common Garage Conversion Contractor Problems We See in Pico Rivera Homes
- Reusing the original 4-inch slab. The original garage floor was not designed to carry bedroom walls. Without saw-cutting and pouring a thickened edge, the first windstorm cracks the wall at the slab joint. We fix this on nearly every conversion we take over.
- Decking over instead of shearing. Some bids show Tuff Shed-style paneling on the former garage door opening to save money. That fails the city’s wind load calculation during plan check. A James Hardie shear wall is the code-compliant answer.
- Skipping the lateral tie-down detail. Since the original garage had no footing, some contractors just bolt the new walls to the slab and call it done. The inspector red-tags the final, and the owner’s insurer refuses to cover the space as primary living area. We hold the line on this one.
- El Niño drainage oversights. Pico Rivera’s occasional heavy winter rains expose poor roof tie-ins and bad drainage around converted garages. We pitch the new roof lines and add proper downspouts so water never pools against the foundation.
Pricing for Garage Conversion Contractor in Pico Rivera, CA
A basic attached garage conversion to living space here starts around $75,000 and climbs with finishes. A full one-bedroom ADU with a bathroom and kitchenette runs $120,000 to $145,000. A detached garage converted to an apartment with its own entrance lands closer to $160,000. Here is where the money goes:
- Slab evaluation and thickened-edge pour: $6,000 – $12,000 when the original slab is non-reinforced
- Wind-load framing, shear walls, and hold-downs: $8,000 – $18,000 depending on span and roof tie-in
- Electrical, plumbing, and HVAC rough-in: $15,000 – $30,000
- Drywall, insulation, flooring, and finish carpentry: $25,000 – $50,000
- Permit fees and plan check: $4,000 – $9,000
Every quote we write is line-itemed. You see exactly what each phase costs before you sign. Estimates are free. Call (626) 657-5541 and we will walk you through it.
One thing worth saying plainly: Pico Rivera’s 2022 ADU ordinance allows detached ADUs up to 25 feet tall within half a mile of a transit stop. That covers a surprising swath of the city’s ranch-home tract, including stretches along Rosemead and Telegraph. Whittier and Montebello do not offer that height allowance. If your garage is in that zone, a two-story addition above the conversion changes both the engineering and the return. We check your parcel against the transit overlay map before we quote, because a taller ADU means different wind uplift ties and a different shear wall spec. A contractor who does not know the ordinance cannot price the job correctly.
Our crew converted a 1963 two-car garage into a one-bedroom ADU on San Gabriel River Parkway, right where the 25-foot height allowance kicked in. The original slab was a 4-inch non-reinforced pour with no perimeter footing, so we saw-cut the pad, poured a 12-inch thickened edge, and tied the new stick-framed bedroom wing into the existing roof with Simpson H2.5A hurricane clips and HDU4 hold-downs for the required 85-mph wind-zone uplift. Final inspection took two visits, and we handed the owner a bound compliance package to file with their insurer. That is the standard. That is how we build in Pico Rivera.
We Also Serve Cities Near Pico Rivera
Fielding ADU Builders covers the surrounding communities, including Montebello, South El Monte, Temple City, and San Marino. If you are outside Pico Rivera but in the San Gabriel Valley, we can likely help. Our Garage Conversion Contractor team handles the same permit path, wind-load detailing, and slab work in every city we serve. For specifics on Pico Rivera zoning and the 2022 ADU height allowance, start with our Garage Conversion Contractor in Pico Rivera page.
Serving Pico Rivera, CA - Our Local Coverage Area
We’re based in the Pico Rivera 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 Pico Rivera
Pico Rivera’s building department requires an 85-mph wind-zone uplift rating, which means hold-downs and hurricane clips must meet the LADBS lateral tie-down detail on every new wall tied to an existing roof. A compliant quote includes Simpson H2.5A clips, HDU4 hold-downs, and a shear wall at the former garage opening. If the quote does not name these products, plan check will send it back. Call (626) 657-5541 and we will show you the exact detail sheet we file.
Yes, but only after the slab is corrected. The original 4-inch non-reinforced pour will not pass as living space. We saw-cut the perimeter, excavate, and pour a 12-inch thickened edge with rebar before any interior walls go up. Skipping that step means cracked walls at the slab joint and a red tag at final inspection. We include this work in every quote, not as a change order later.
The inspectors here accept engineered shear wall panels like James Hardie products, installed with the specified fastener schedule and reviewed in plan check. They reject decking or paneling that has no rated shear capacity. We have passed final inspections in Pico Rivera using these exact products, and we would not spec anything the city has already rejected on another project. For an exact product list on your job, call (626) 657-5541.
When the conversion is permitted and the wind-load details are documented, most insurers will cover the space as primary living area. Without that documentation, some carriers exclude the converted garage from coverage or treat it as an unpermitted structure. We hand every Pico Rivera owner a bound compliance package after final inspection, including the shear wall spec, hold-down schedule, and passed inspection records. File it with your insurer. It is the difference between a covered bedroom and a denied claim. Call (626) 657-5541 and we will walk you through the full package.
Yes, Pico Rivera’s 2022 ADU ordinance allows detached ADUs up to 25 feet tall within half a mile of a transit stop. That covers a significant portion of the city’s ranch-home tract. A taller ADU changes the engineering: more wind uplift surface, more shear wall area, and different hold-down requirements. We check your parcel against the transit overlay before we quote, so the price reflects the actual build, not a guess. Get your free estimate by calling (626) 657-5541.
Written by Reed Calloway, Owner at Fielding ADU Pasadena, building to The Garrison Standard since 2006.




