Garage conversion contractor in Walnut Creek and the Bay Area

Your Garage, Your New Room

We turn Bay Area garages into ADUs, offices and living space, with permits, plans and construction under one licensed contractor. You pay nothing until the job is done.
A cozy room with a brown sectional sofa, green and beige pillows, a bed with patterned bedding, and wood-look flooring under bright ceiling lights—crafted by a skilled general contractor in Contra Costa & Alameda County, CA.

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Don’t compromise on quality. Hire only the best.

  • Full service

    General Contractor

    One licensed and insured general contractor for the whole job — design, permits, framing, plumbing, electrical and finish work. CSLB License #1107930. You get a single point of contact, a written schedule and crews we manage ourselves.

    General contracting
  • Exterior

    Siding

    Fiber cement, James Hardie, engineered wood, stucco repair and vinyl siding installation across the East Bay. New siding seals out water intrusion and dry rot, improves insulation and fire resistance, and resets your curb appeal in one project.

    Siding services
  • Exterior

    Roofing

    Roof replacement and leak repair in Walnut Creek and Contra Costa County — architectural shingles, tile, metal and flat TPO systems. We inspect decking, flashing and attic ventilation first, so we fix the cause of the leak instead of covering it.

    Roofing services
  • Whole home

    Home Remodelers

    Whole-home remodeling and room additions — open-concept layouts, structural beams, new windows, HVAC and full interior finishes. We sequence every trade under one contract so a multi-room renovation finishes on schedule.

    Home remodeling
  • Structural

    A.D.U.

    Detached, attached and junior accessory dwelling units built to current California ADU law — plans, permitting, foundation, utilities and finishes. Add rental income, house family close by, and gain permitted, appraisable square footage.

    ADU construction
  • Outdoor

    Hardscaping & Landscaping

    Complete yard transformations — paver patios, retaining walls, walkways, driveways, drainage, irrigation, sod and drought-tolerant planting. Proper grading keeps water away from your foundation while turning unused yard into space you use.

    Hardscaping & landscaping
  • Finishes

    Exterior & Interior Paint

    House painting inside and out, with the prep that makes it last: pressure washing, scraping, caulking, patching, priming and two finish coats of premium paint. Clean lines, protected trim and siding, and a color consultation first.

    Painting services
  • Structural

    Garage Conversions

    Turn an underused garage into a legal studio, in-law suite, home office or gym. We level the slab, frame and insulate to code, then add HVAC, dedicated circuits, plumbing and egress windows — the fastest way to gain permitted square footage.

    Garage conversions
  • Interior

    Kitchen Remodeling

    Custom kitchen remodeling from layout to final trim — cabinets, quartz countertops, tile backsplash, lighting, plumbing and electrical. We open closed floor plans, add the storage you actually need, and deliver the strongest resale return in the house.

    Kitchen remodeling
  • Interior

    Bathroom Remodeling

    Walk-in showers, freestanding tubs, double vanities and heated tile floors, built on waterproofing that lasts. Full bathroom remodels, tub-to-shower conversions and ADA-friendly upgrades, with permits pulled and moisture-proof framing behind every wall.

    Bathroom remodeling
  • Outdoor

    Hardscaping

    Paver and stamped concrete patios, retaining walls, stone veneer, fire pits, outdoor kitchens and seat walls. Compacted base, correct slope and proper drainage keep the surface level for years instead of cracking after the first wet winter.

    Hardscaping
  • Interior

    Flooring

    Hardwood, engineered wood, luxury vinyl plank, tile and carpet installation, including subfloor leveling, moisture barriers and stair treads. New flooring ties rooms together, stands up to pets and kids, and is the first thing buyers notice.

    Flooring installation
  • Finishes

    Painting

    Interior painting for single rooms or the entire house — walls, ceilings, trim, doors, cabinets and accent walls. Surfaces are patched, sanded and primed, floors and furniture masked, and every edge cut in by hand.

    Interior painting
  • Outdoor

    Decks

    Custom redwood, cedar and composite decks, plus railings, stairs, pergolas and multi-level builds on sloped Bay Area lots. Engineered footings, code-compliant framing and hidden fasteners give you outdoor living space that stays solid for decades.

    Deck building
Approved FHA Title I Lender

Financing Through Service Finance Company

Service Finance Company, LLC is a nationally licensed sales finance company providing outstanding financial solutions to homeowners looking to invest in their homes.

Flexible Financing Options

Choose from a variety of loan term options to find the one that fits your financial plan best — so your home improvements work with your budget, not against it.

Quick & Easy Approvals

Get a fast credit decision with a simple, streamlined application process. Less waiting means you can start your project sooner.

No Equity Required

Unlike traditional financing methods, you don't need home equity to qualify. Open the door to improvements regardless of how long you've owned your home.

Competitive Rates

Service Finance offers competitive rates to ensure your home improvements are both beneficial and affordable — maximizing the value of every dollar.

Fund Your Home Improvement Project Today

From energy-efficient upgrades to a complete home makeover, Service Finance LLC provides financing solutions so you can invest in your home without the financial worry.

Apply for Financing No obligation · Quick credit decision

Dual Licensed Contractor

A general contractor license and a roofing license mean framing, electrical coordination, roof tie-ins and finishes all stay with one team.

Never Get Burnt Guarantee

No money up front. You pay once the conversion is finished, with easy 12, 18 or 24 month payment plans if you want them.

BBB Accredited

DoPro is a BBB Accredited business with 40+ years of combined building experience on the team.

One Project Manager

One person runs your conversion from the first visit to the final walkthrough and sends you a progress update every week.

Our Related Services!

Attached Adus

Detached Adus

Garage To Living Conversions

A.D.U.

Modern kitchen with white cabinets, a washing machine, stove, oven, and stainless steel sink. Blue tile backsplash and light wood flooring complete the look. A general contractor Contra Costa & Alameda County can help you achieve this style in CA.

Garage conversion contractor in the Bay Area

The Room You Already Own

A garage conversion turns the space you already have into a finished room: a rental unit, a home office, a space for family, or a place for aging parents. Because the walls, roof and slab are already there, it is often the fastest way to add living space to a Bay Area home. Most of our garage projects go one of two ways. Some become a full ADU with a kitchen and bathroom, either attached to the house or standing on its own. Others become an office or extra living space without a kitchen. We build across Contra Costa and Alameda counties and the wider Bay Area.

Garage conversion cost in the Bay Area

What Your Conversion Includes

Garage conversions range from $130K to $180K. You see the price for your garage in writing before anything starts.

A free consultation and a written estimate that lists the scope, so you can compare quotes fairly.
Plans drawn for your city, through our blueprint and planning service.
Framing, insulation, windows, doors and finishes built by a licensed general contractor.
One project manager who runs the job and sends you a progress update every week.
Your driveway and yard protected during the build, and a full cleanup at the end.
No payment until the job is finished, and easy payment plans of 12, 18 or 24 months.
A modern, bright kitchen by a general contractor in Contra Costa & Alameda County, CA, features white cabinets, black countertops, blue subway tile backsplash, light wood flooring, a white dining table with chairs, and a fridge near the back door.

Garage conversion permits in the Bay Area

Permits Without the Guesswork

A garage that becomes a bedroom, office or ADU needs a building permit in California, and each Bay Area city has its own rules and review times. Getting it wrong can mean a stop-work order or a room you cannot legally rent. California law has made garage-to-ADU conversions much easier. In most cases you do not have to replace the parking spaces you lose when a garage becomes an ADU, and cities must review complete ADU applications within a set time. Your project manager handles the plans and the permit with your city, so you are not the one chasing the building department.
White modern house in CA with a gray metal roof and matching detached garage. Designed by a general contractor Contra Costa & Alameda County, it features large potted plants, a stone walkway, patio chairs, and lush greenery along the driveway.

Garage to ADU conversion in the Bay Area

Rental, Office or Family Space

The right conversion depends on how you want to use the space. A garage ADU with its own kitchen and bathroom can be rented out or used for family, and it adds a separate unit to your property. A garage office or bonus room skips the kitchen and most of the plumbing. Some homeowners go further: one client turned an old 1938 garage into a full movie theater and game room. Tell us how you want to use the space and we will price the options side by side.

Frequently Asked Questions

How much does a garage conversion cost in the Bay Area?
Garage conversions with DoPro range from $130K to $180K. You get a free written estimate for your garage first, nothing is due until the work is done, and easy 12, 18 or 24 month payment plans are available.
Yes, with a permit. California law supports converting a garage into an ADU, and in most cases you do not have to replace the parking you lose. Your city still reviews the plans and inspects the work, so the conversion has to be permitted to be legal to live in or rent.
Yes. Turning a garage into a bedroom, office or ADU changes how the space is used, so California cities require a building permit. We prepare the plans and handle the permit with your city.
It depends on your home. A garage conversion reuses the foundation, walls and roof that are already there, while an addition builds all of that new. If you are weighing both, we can price each one for your home.
No. Under our Never Get Burnt Guarantee you pay nothing up front and only pay once the conversion is finished. You can also spread the cost with easy 12, 18 or 24 month payment plans through Service Finance Company or GreenSky.
Choose an ADU if you want rental income or a separate place for family, since it includes a kitchen and bathroom. Choose an office or bonus room if you only need extra space for your own household. We can walk the garage with you and price both.

Site Assessment & Planning

We evaluate your garage’s structural integrity, utility access, and zoning compliance to create your custom conversion plan.

Permits & Approvals

Our team handles all permit applications, city communications, and code compliance documentation for seamless approval.

Construction & Completion

Professional construction with weekly updates, quality materials, and final inspection to deliver your finished living space.

Cities We Provide Garage Conversions In

Find your city+
Abbington At Gale RanchAlhambra ValleyAlbraeAltamontAmbridgeAntiochArdenwoodAshbyAshlandAvonBayo VistaBay PointBent Creek EstatesBethel IslandBixlerBlackhawkBlacowBrentwoodBridgeheadBrookvaleByronCamino TassajaraCanadoro At WindemereCanyon HeightsCanyon OwnersCanyon ViewCapella At Gale RanchCastle ViewCastro ValleyCenterville DistrictCherry GuardinoCherrylandChristieClaytonClydeCobblestoneConcordCopper Ridge CondominiumsCrockettCrownyon HeightsDanvilleDiabloDiscovery BayDublinEast IndustrialEast PleasantonEckleyEl CerritoFairviewFairway ParkFarwellFioli WindeFleur DumontFremontGateleyGlen EdenGlen FrazerGlenmoorGrimmerHaywardHayward HighlandHerculesHerpocoHills At Bent CreekHookstonIrvingtonIrvington DistrictJackson TriangleJarvis LandingKimber GomesKnightsenKomandorski VillageLafayetteLakes And BirdsLexingtonLivermoreLongwood Winton GroveLorenzo StationLos MedanosLuzonMaltbyMarsh Creek SpringsMartinezMcavoyMeinertMiravillaMission FoothillsMission GarinMission San JoseMission San Jose DistrictMonsantoMoragaMount Eden StationMt EdenMuirNerolyNewarkNewloveNicholsNilesNiles DistrictNortonvilleNorth HaywardOakleyOld Ranch SummitOleumOrindaOrinda VillageOrwoodOzolPachecoParkmontPinolePittsburgPleasant HillPleasantonPort CostaRadumRenaissance 1Reliez ValleyRichmondRock CityRodeoRose Garden EncoreRoyal RidgeRussell CitySan LeandroSan LorenzoSan RamonSan Ramon FoothillsSand HillSelbyShore AcresSomersvilleSouth SundaleStewartvilleSundaleTennyson AlquireTormeyTrevarnoTrevari At Gale RanchUnion CityUpper B StreetValonaVestrella At Gale RanchVine HillVineyards AvalonVista Pointenyon LakesVista San RamonWalnut CreekWalnut HeightsWarm Springs DistrictWeibelWernerWest HartleyWhitman
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