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 Hidden Hills
A garage conversion in Hidden Hills costs between $85,000 and $160,000 for a full living-space build-out with bath, before permit and Architectural Committee fees. Most jobs take 10 to 16 weeks from first call to final inspection, and the single biggest schedule driver is the Hidden Hills Community Association Architectural Committee review, which must approve exterior changes before the city permit can be issued. If you’re weighing whether to convert your garage into a bedroom, guest suite, or office, call (361) 315-4177 and we’ll walk you through exactly what the job involves on your lot. We’re a Garage Conversion Contractor that puts the price in writing before any work starts.
Why Fielding ADU Builders Is Hidden Hills’s Preferred Garage Conversion Contractor Company
Fielding ADU Builders has converted garages throughout Hidden Hills, from Long Valley Road to Round Meadow and the lots backing up to the open space east of Valley Spring Drive. Homeowners here don’t hire a contractor twice. They want to know the crew will show up, the price will hold, and the permit file will be complete when the inspector arrives. That’s the work we do. Reed Calloway runs our garage conversion and ADU division, and every project gets his direct oversight on schedule and change-order discipline. The Garrison Standard, set by our parent organization Garrison Partners in 2006, is simple: written price before any work starts, background-checked and uniformed crew on site, and a one-year written guarantee on workmanship. If something fails inside that year, we return at no charge and correct the defect.
We know the Hidden Hills process cold: Architectural Committee submittal on the front end, city plan check, structural calcs for the garage door header replacement, and final inspection on the back end. The result is a conversion that won’t get flagged by the city or the HOA six months later. When you call (361) 315-4177, you’ll reach a live person who can answer questions about your specific street and lot. No call queue, no voicemail.
Garage Conversion to Living Space in Hidden Hills
Garage Conversion to Living Space is the most common request we get from Hidden Hills homeowners who have an attached three-car garage that’s half-used or a detached two-car that’s become storage. The job means taking the garage from a place you park cars to a finished room with insulation, drywall, electrical, a proper subfloor over the slab, and HVAC tied into the house or split off with a mini-split. In Hidden Hills, this work typically runs $85,000 to $145,000, not including Architectural Committee fees or city permit costs. The exterior almost always stays the same shape: same roof line, same stucco, same trim. That’s what keeps the HOA review moving.
The sequence matters. Hidden Hills is a gated city where every exterior change to a garage, stucco, roof pitch, door color, even driveway resurfacing, runs through the Hidden Hills Community Association’s Architectural Committee review before the city’s building permit is issued. So the design package, not just the construction docs, drives the schedule and cost here. We prepare that package with the Committee’s checklist in mind from day one, so you’re not resubmitting drawings three times.
Attached Garage Conversion
An attached conversion usually means replacing the garage door with a wall or a sliding panel system, adding a matching egress window, and pulling electrical from the existing panel. The subpanel capacity question comes up early: many Hidden Hills homes built in the 1970s and 1980s have 100-amp panels that need an upgrade before the city will approve a new bedroom circuit. We flag that on the first walkthrough, not after the walls are open.
Detached Garage Conversion
A detached garage gives you more privacy for a guest suite or office but adds a longer trench for utilities. Water, sewer or a macerator line, and power all need to run from the main house. That’s an extra $8,000 to $18,000 before you touch framing. The tradeoff is that a detached conversion keeps the work away from your primary living space, so the house stays quieter during the build.
Garage to Bedroom Conversion in Hidden Hills
Garage to Bedroom Conversion work in Hidden Hills means bringing the space up to California Residential Code for a legal sleeping room: egress window with specific sill heights, hardwired smoke and CO detection, a closet or armoire space per the city’s definition, and heating and cooling sized to the square footage. A single bedroom conversion with an adjacent half bath typically runs $90,000 to $130,000. A two-bedroom conversion with a full bath pushes into the $140,000 to $160,000 range. The cost spread depends on slab condition, panel capacity, and how far the new bath sits from the main sewer line.
One thing we tell every Hidden Hills homeowner: a converted garage can absolutely be a legal bedroom, but the city checks the egress window clear opening and the ventilation. If the garage floor sits below grade on one side, you may need a window well or a different window specification. We handle that in the design set before anything gets framed.
Garage to Bedroom With Bath
Adding a bath inside the converted space is the single largest scope increase. You’re looking at a below-slab sewer line or a rear-outlet macerator system depending on grade, plus waterproofing, a vent fan, and a dedicated circuit for a future electric heater or hair appliance load. Hidden Hills lots with existing cleanouts near the garage make this straightforward. Lots without one add $6,000 to $12,000 for the connect.
Garage to Bedroom Without Bath
If the bedroom will be used by family who can share the main house bath, you can drop the cost meaningfully. The conversion then centers on insulation, drywall, flooring over slab, egress, and electrical. We still pull the full permit: the city requires plans, structural calcs for the header, electrical, and a final inspection regardless of whether you’re adding plumbing.
Trusted Brands We Service in Hidden Hills
When a Hidden Hills homeowner is comparing garage conversion methods, they’re usually also looking at prefab and modular platforms. We work with Abodu, Cover, and Boxabl on garage-adjacent ADU projects, and we stock or source parts for James Hardie siding and Tuff Shed-style framing systems locally. The brand choice matters less than the install, though. A prefab panel system only performs if the slab is flat, the tie-downs are right, and the flashing details are clean. We handle that with conventional framing crews who have done work in Hidden Hills, so when an Architectural Committee reviewer asks about wall cladding or roof integration, the answer is in the drawings, not improvised on site.
Common Garage Conversion Contractor Problems We See in Hidden Hills Homes
- Starting work before Architectural Committee approval. In Hidden Hills, unapproved exterior alterations can force a tear-out and resubmittal. We won’t pull a demo permit or move a wall until the Committee signs off, even if the homeowner is eager to start. The risk isn’t worth the three weeks it would save.
- Assuming a garage conversion is permit-lite. The city still requires plans, structural calcs for the garage door header replacement, electrical, plumbing, and insulation details, plus a final inspection. Hidden Hills doesn’t wave anything through just because the original structure is existing.
- Underbudgeting the hidden scope. Once the drywall comes off, you learn what’s really in the slab and behind the stucco. Moisture at the slab edge, a subpanel that’s already maxed, an HVAC return run that’s too long for the existing blower. These are the line items that stall jobs mid-build if they weren’t priced on the front end.
- Missing the egress window clearance. Hidden Hills lots often have slightly unusual grade changes at the garage. A window that meets code on paper can fail field inspection if the exterior grade is too high relative to the sill. We survey the grade at the first visit and put the correct window spec in the drawings.
Pricing for Garage Conversion Contractor in Hidden Hills, CA
Here are real numbers for Hidden Hills work. A basic attached two-car garage to living space runs $85,000 to $110,000. That includes demo of the garage door, framing the new wall, insulation, drywall, electrical, egress window, flooring, and paint. A garage to bedroom with a full bath runs $120,000 to $160,000. A detached garage conversion with utility trenching adds $8,000 to $18,000 over the attached numbers. Architectural Committee submittal fees and city permit fees are additional, usually $4,000 to $9,000 combined depending on scope and plan check cycles. You get the written price before any work starts, and that price doesn’t move unless you add scope or the city requires a change during plan check. Call (361) 315-4177 for a free estimate on your specific garage.
We Also Serve Cities Near Hidden Hills
Our crew coordinates from our Los Angeles office and serves Hidden Hills along with Los Angeles, Long Beach, Anaheim, and Riverside. If your garage conversion is just outside city limits or on a lot that straddles the Hidden Hills service boundary, call us and we’ll confirm coverage. The same written-price policy and one-year Garrison Standard apply on every job.
Serving Hidden Hills, CA - Our Local Coverage Area
We’re based in the Hidden Hills 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 Hidden Hills
Yes, it needs both, and the Architectural Committee comes first. In Hidden Hills, every exterior alteration to a garage, stucco changes, roof pitch, door color, even driveway resurfacing, requires Hidden Hills Community Association Architectural Committee approval before the city will issue a building permit. We prepare the design package to meet the Committee’s checklist, get the approval, then file the city permit. Call (361) 315-4177 if you want us to handle both for your project.
It starts with design drawings and Architectural Committee submittal, then city plan check and permit issuance, garage door removal, framing the replacement wall, running electrical and plumbing, insulation and drywall, flooring, installation of the egress window and doors, paint, and a final inspection by the city. Our tech converted a three-car garage off Long Valley Road into a guest suite plus bath: we kept the existing hip roof and stucco to satisfy the Architectural Committee, framed the new bedroom wall with a recessed egress window, wired for mini-split HVAC and tankless hot water, and passed Hidden Hills’ final inspection with the garage door removed and replaced by a James Hardie-clad sliding panel that matched the home’s palette.
Most Hidden Hills garage conversions take 10 to 16 weeks from first call to final inspection. The Architectural Committee review typically adds two to four weeks before the city permit clock even starts, so factor that in. Once we have permit in hand, construction on an attached two-car conversion usually runs 6 to 10 weeks. Call (361) 315-4177 for a calendar specific to your street and scope.
Only three things change a written price: you add square footage or finishes, the city requires a structural or energy code item during plan check that wasn’t in the original drawings, or the slab fails a moisture test and needs remediation. We price the known risk on the front end and put the number in writing before any work starts. Hidden Hills slab conditions are generally predictable, but pre-1980 homes sometimes show edge moisture that requires a vapor barrier and additional testing.
Yes. To be a legal bedroom in Hidden Hills, the converted garage must meet California Residential Code for egress window clear opening, sill height, smoke and carbon monoxide detection, heating and cooling, and a closet or defined clothing storage space. The city inspects all of it. We build every garage-to-bedroom conversion to the legal standard, and the final inspection record is part of the closeout packet you keep.
If you’re ready to price your garage conversion in Hidden Hills, call (361) 315-4177. We’ll schedule a walkthrough, put the number in writing, and walk you through the Architectural Committee and city permit sequence in order. Free estimate, no change order surprises.
Written by Reed Calloway, Owner at Fielding ADU Builders, serving Hidden Hills and the surrounding area.
