Garage Conversions
Turn your underused garage into functional living space — a guest suite, home office, ADU, or family room. Fully permitted and built to California code.
Unlock the Space You Already Have
Most Sacramento garages are used for storage, not cars. A garage conversion transforms that underutilized square footage into a fully finished living space — without the cost and complexity of building a new structure from the ground up. Whether you need an extra bedroom, a private home office, a guest suite for aging parents, or a full ADU that generates rental income, your garage is the fastest and most affordable path to additional livable square footage on your property.
California has made garage conversions easier than ever. Under current state law, homeowners can convert a garage into an ADU without meeting the replacement parking requirements that used to block these projects. Many Sacramento-area jurisdictions now fast-track garage conversion permits, which means shorter wait times and fewer bureaucratic hurdles. At Keystone Building Services, we handle the entire permitting process — applications, plan submissions, city reviews, and inspections — so you never have to navigate a building department on your own.
A basic garage conversion starts around $30,000, while a full ADU conversion with a kitchen, bathroom, and separate entrance ranges from $50,000 to $80,000 and up, depending on finishes and site conditions. Every conversion includes structural framing, insulation, drywall, flooring over the existing concrete slab, electrical work, and climate control. Gerardo Diaz is a licensed electrician with over 11 years of construction experience, which means electrical upgrades, new circuits, lighting, and outlet placement are all handled in-house — not subcontracted out.
What Your Garage Can Become
Guest Suite
A private bedroom with its own entrance, closet, and optional bathroom — ideal for visiting family or aging parents who want proximity without sacrificing independence.
ADU / Rental Unit
A fully permitted accessory dwelling unit with kitchen, bathroom, and living area. California law makes garage-to-ADU conversions one of the fastest paths to rental income.
Home Office
A dedicated workspace with proper insulation, lighting, electrical outlets, and climate control — separated from the distractions of your main living area.
Family Room / Living Space
Extra square footage for a media room, playroom, home gym, or second living area. We insulate, add flooring over the slab, and finish the space to match your home interior.
What a Garage Conversion Involves
A garage conversion is not just drywall and paint. The existing garage structure needs to meet residential building codes for habitable space, which means insulation in the walls and ceiling, a finished floor over the concrete slab, proper egress windows, upgraded electrical service, and climate control. If you are converting to an ADU, you also need plumbing for a kitchen and bathroom, a separate entrance, and potentially separate utility metering.
The garage door opening is one of the most visible transformations. We frame in a new wall where the garage door was and install windows and a standard or French door entry. The goal is a finished exterior that looks intentional — not like a garage with a wall bolted over the opening. Keystone Building Services matches siding, stucco, or paint to your existing home so the conversion blends seamlessly with the rest of the property.
Full-Scope Garage Conversion Services
Why Choose Keystone for Your Garage Conversion
Garage conversions touch every trade — framing, electrical, plumbing, insulation, drywall, flooring, and finish work. With Keystone Building Services, you get a single licensed contractor managing all of it. Gerardo Diazpersonally oversees every project, and because he is a licensed electrician, your conversion's electrical system is handled in-house with expert precision. That means no subcontractor coordination headaches and no waiting for separate trades to show up.
Every garage conversion we build is fully permitted and inspected. We handle permit applications, plan submissions, and all required inspections through the City of Sacramento and surrounding jurisdictions. Your project is backed by California contractor license #1095766, a $15,000 bond, full insurance, and a BuildZoom score of 98/100. We build it right the first time because that is the only way we know how.
Garage Conversion FAQs
Ready to Convert Your Garage?
Get a free, no-obligation estimate for your Sacramento garage conversion. Call us today or fill out our quick online form.