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Monday – Friday: 7:30 a.m. – 4:30 p.m.General Building Contractor (B) · HI License # 000000VerifyGeneral liability and workers' compensation
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  • General liability and workers' compensation
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Garage conversions

A garage with walls and a roof is most of the way there

The shell is standing. What a garage lacks is a floor that drains the right way, insulation, windows, a kitchenette and bath, a separation from the main house and, in some cases, somewhere to park the cars it used to hold.

Not included unless the scope says so: appliances, furniture, a new driveway or a replacement garage.

What a conversion includes

  • A level, insulated floor over the existing slab

  • Windows and a proper entry door

  • Walls and ceiling insulated and ventilated for humid weather

  • A bath and kitchenette, with plumbing and electric brought in

  • Fire separation from the main house where the rules call for it

Side entry of a white house with a black door, a gutter and a small patio set

What changes the cost

What a conversion's price follows

Because the shell exists, the cost sits in what the shell doesn't have.

  • The slab

    A garage floor is sloped to a drain. We check its level, its moisture and what it takes to make it a living floor.

  • Plumbing runs

    The nearer the main house's plumbing, the shorter the run. A far corner means trenching through the slab.

  • Windows and light

    Garages have few windows. New openings in a wall that carries load need framing and a permit.

  • The panel

    A new unit often needs its own electric panel or service, which has its own sign-off.

  • Where the cars go

    If the rules require parking, the plan includes it, and a driveway or carport adds to the job.

  • What ships

    Windows, an entry door and cabinets are ordered from the plans and carry lead times.

We print no figures here. The written estimate lists each of these for your lot.

How it goes

A sample conversion, after the permit

Shorter than a new building, because the walls are up. The permit review still sets the start.

  1. 01
    Weeks 1 to 2

    Step 1: Demolition and slab work

    Garage door out, openings framed, slab checked and prepared.

  2. 02
    Weeks 2 to 5

    Step 2: Framing, windows and entry

    New walls where needed, windows and the entry door set.

  3. 03
    Weeks 5 to 9

    Step 3: Rough work and inspections

    Plumbing, electric and insulation, inspected before the walls close.

  4. 04
    Weeks 9 to 14

    Step 4: Finish and final

    Drywall, floor, cabinets, paint and fixtures, then the final inspection.

Sample content.

Permits and rules

What the city and the lot decide

These are the first questions on a garage. We check them before drawings.

  • Parking

    Some lots must replace the spaces a garage held. We check yours before you decide to convert.

  • Fire separation

    A wall and a door between a garage unit and the main house may need a fire rating.

  • Egress and ventilation

    A bedroom needs a window you can climb out of, and a bath needs a fan that vents outside.

Questions

Questions about garage conversions

Do I have to keep a place to park?

It depends on your zoning district and the rules in force. We check at the lot visit and tell you in writing before you spend on drawings.

Is a carport easier than a garage?

Sometimes it is simpler to enclose, sometimes harder, because it has no walls. We look at the posts, the slab and the roof before we say.

Can the unit have its own entry?

Yes, and we recommend it. A door that doesn't open into the main house is the most common request from households with more than one generation.

Will it stay cool?

We insulate the roof and walls and add ventilation planned for humid weather. Ceiling fans and cross-breeze windows are part of the layout.

Is your garage worth converting?

Text a photo of the garage and the driveway, and tell us who it's for.