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Service 04 / 16

Garage Conversion

Real Deal Builders converts garages into legal, permitted living space, whether that means a full ADU with its own kitchen and bathroom, a junior ADU, a bedroom suite, a home office, or a gym. A garage conversion is a code compliance project as much as a finish project, because a garage was never built to be lived in. The floor slopes toward the door, the walls and ceiling are usually uninsulated, there is no heating or cooling, and a room used for sleeping needs an egress window sized to code. We handle all of it, from the permit application through the framing, insulation, electrical, and finishes, so the finished room is legal, comfortable, and counts as real living space rather than a garage with carpet.

Garage converted into a finished living room with a leather sofa, area rug, and the original garage door opening replaced by a window wall
Typical timeline
6 to 12 weeks build, plus permits
Trades we manage
Framing, insulation, electrical, HVAC, drywall, finishes
Permits
Always required
Typical scope
Office or bedroom conversion to full detached ADU

Behind the work

How this comes together

01

What has to change to make a garage legal living space

A garage is built to different standards than a room you live in, so a conversion is mostly about closing that gap. The slab slopes toward the door for drainage, so the floor has to be raised and leveled to meet the rest of the house. Habitable rooms need a minimum ceiling height, which is where a low garage ceiling can force a redesign. Walls and ceilings that were never insulated have to be insulated and drywalled. Heating and cooling have to reach the room, either extended from the existing system or added as a dedicated mini split.

If the room will be used for sleeping, code requires an egress window large enough to climb out of, with a minimum net clear opening, minimum width and height, and a sill no higher than a set distance above the floor. Where part of the space stays a garage, a rated fire separation has to remain between the two. These are the requirements that decide whether the finished room is legal square footage or an unpermitted room that becomes a problem at resale.

02

ADU, junior ADU, or just another room

The same garage can become three different things, and the right answer depends on what you want out of it. A full ADU has its own kitchen, its own bathroom, and its own entrance, which makes it rentable and adds the most value. A junior ADU is a smaller conversion within the existing footprint with an efficiency kitchen, and it carries a lighter permit path in many cases. Converting to a bedroom, office, or gym without a kitchen is the simplest and cheapest route, and it still has to be permitted to count.

We walk you through what your lot and your city actually allow before we design anything, because the rules on parking replacement, setbacks, and utility connections vary and they decide what is possible. It is better to find that out on paper than after the framing is up.

Garage conversion code requirements, section view Section through a converted garage showing a raised level floor over the sloped slab, seven foot minimum ceiling height, an egress window with a sill height limit, new wall and ceiling insulation, a ductless mini split, the garage door opening framed into a finished wall, and fire separation at the house. Garage conversion, section Seven code driven changes before it is living space 7 feet minimum finished ceiling height Sill 44 in max above the floor 1 2 3 4 5 6 7 House Existing slab pitches toward the door opening 1 · Level floor Slabs pitch to the door. New floor is raised flat. 2 · Ceiling height Habitable space needs 7 feet finished, minimum. 3 · Egress window 5.7 sq ft net clear opening in a sleeping room. 24 in min height, 20 in min width. Sill no higher than 44 in above the floor. 4 · Insulation Garage walls and ceilings are bare. Both get filled. 5 · Heating and cooling Extend the ducts or add a ductless mini split. 6 · Door opening The opening becomes a wall with a window or slider. 7 · Fire separation Any garage left over keeps its rated wall and door. The finishes are the easy part. The floor, the ceiling, and the window are what make it legal.
What has to change to make a garage legal living space. A garage conversion is a code compliance project as much as a finish project. The floor has to be raised and leveled, the ceiling has to clear seven feet, a sleeping room needs a real egress window, and insulation, heat, and fire separation all have to be brought up to habitable standard before the drywall goes on.

What this service includes

  • Garage to ADU conversion, with full kitchen and bathroom
  • Garage to junior ADU, with an efficiency kitchen
  • Garage to bedroom, office, gym, studio, or media room
  • Floor raised and leveled, since a garage slab slopes toward the door
  • Insulation in walls and ceiling, where a garage usually has none
  • Egress window sized to code for any room used for sleeping
  • Heating and cooling, either extended from the house or a dedicated mini split
  • The garage door opening framed into a finished wall, window, or slider
  • Electrical subpanel, new circuits, outlets, and lighting to code
  • Fire separation where any part of the garage remains a garage
  • Permit application, plan check, and inspections

Recent work

Garage Conversion in the Santa Clarita Valley

Converted garage finished as a lounge and workshop space with warm lighting, built in cabinetry, and a motorcycle on display

Working with us

From first call to final walkthrough

  1. 01

    Free walk

    We come to your home or site, talk through what you want to change, and ask the questions that shape an accurate scope.

  2. 02

    Written quote

    A detailed, honest, written quote lands in your inbox. You know the scope and the number before any work begins.

  3. 03

    Trades in order

    We sequence the trades so each one sets up the next, with one point of contact holding the whole project together.

  4. 04

    Punch and walkthrough

    We walk every finish with you, correct anything on the list, and do not close the job until it is done rather than promised for later.

Common questions

Frequently asked

The questions we hear most often, answered plainly. If your question is not here, call us and we will answer it the same way.

Can I convert my garage into an ADU?

In most cases yes. California has made garage conversions to accessory dwelling units far easier than they used to be, and a garage is one of the most common and cost effective ways to add an ADU because the foundation, walls, and roof already exist. We confirm what your specific lot and city allow before we design anything.

What is the difference between an ADU and a junior ADU?

A full ADU is an independent dwelling with its own kitchen, bathroom, and entrance. A junior ADU is smaller, created within the existing footprint of the home, and can have an efficiency kitchen rather than a full one. Junior ADUs often carry a lighter permit path and lower cost, but they are also more limited in what they can be used for.

Does a garage conversion need a permit?

Yes. Converting a garage to living space always needs a permit, and doing it without one creates real trouble at resale, at refinance, and with insurance. Unpermitted converted space also does not count toward your legal square footage. We handle the permit and the inspections as part of the job.

Why does the floor have to be raised?

A garage slab is poured with a slope toward the door so water drains out. A room you live in needs a level floor that meets the height of the rest of the house. That usually means building a raised subfloor over the slab, which also gives us a place to run insulation and utilities.

Is my garage ceiling tall enough?

Habitable rooms have a minimum ceiling height under code. Many garages clear it comfortably, but some, especially where the floor has to be raised, end up tight. We measure before we design, because ceiling height is the constraint most likely to change the plan.

Do I need an egress window?

If the room will be used for sleeping, yes. Code requires a window with a minimum net clear opening, a minimum width and height, and a sill within a set distance of the floor, so a person can get out and a firefighter can get in. Rooms that are not bedrooms have lighter requirements.

What happens to the garage door?

It comes out. We frame the opening into a finished wall, and depending on the design that wall gets a window, a slider, French doors, or an entry door. Detailing that wall so it matches the rest of the house from the street is what keeps the conversion from looking like a converted garage.

Do I lose required parking?

It depends on your city and on whether the conversion is an ADU. State ADU law has removed replacement parking requirements in many situations, but the rules are not identical everywhere. We check your specific case before we design, because parking is one of the more common reasons a plan has to change.

How long does a garage conversion take?

Plan on several months once you count the permit and plan check window. The construction itself commonly runs six to twelve weeks depending on whether it includes a kitchen and bathroom. The permit stage is usually the longest and least predictable phase.

How much does a garage conversion cost?

Cost is driven mostly by whether you are adding a kitchen and a bathroom, since plumbing is the expensive part. A conversion to an office or a bedroom is far less than a full ADU conversion. We price against a specific written scope once the design is real rather than guessed at.

Will a garage conversion add value to my home?

Converted space that is permitted and legal counts toward your livable square footage, and an ADU can generate rental income on top of that. Unpermitted converted space does the opposite, because a buyer, an appraiser, and a lender will all treat it as a liability. The permit is what makes it an asset.

Planning a project like this?

When you are ready for a number on your own project, we will walk it with you and put the price in writing.