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Top Licensed Garage Conversion Contractor in Altadena, CA

Garage Conversions by a top-rated, local licensed general contractor serving Altadena and Los Angeles County. Free estimates, written fixed-price contracts, 24/7 support.

Garage Conversions in Altadena

Need a licensed garage conversion contractor near Altadena? A garage conversion is often the fastest and most affordable way to add a legal living unit in Altadena. The walls, slab and roof are already there; we bring the space up to code for habitation and finish it like the rest of your home.

Altadena is about 14 miles east of our North Hollywood office, so our Southern California crews are on site quickly for estimates, inspections and the day-to-day work.

What's included

Assessment of the existing slab, framing and roof
Insulation, drywall and Title 24 energy upgrades
Replacing the garage door with a code-compliant wall and windows
New plumbing for a kitchen and bathroom
Electrical subpanel, lighting and outlets
Flooring, paint and finish carpentry

Building in Altadena

Many Altadena homes sit on hillside lots or in designated fire hazard severity zones. That can mean geotechnical review, retaining walls, and ignition-resistant materials under the California wildfire building standards. We plan for those requirements from the first site visit.

Altadena is unincorporated, so permits go through Los Angeles County rather than a city building department. Converting an existing garage into an ADU is covered by the state ADU laws, and replacement parking is generally not required when a garage is converted. We confirm the details with the Altadena building department.

What affects the price

Condition of the existing slab and whether it needs a vapor barrier or leveling
Adding a kitchen or bathroom (sewer and water connection)
Electrical service capacity
Windows, egress and ceiling height
Finish materials

Every estimate is free, written and itemized. Call 844-975-5512 to schedule a visit.

How we work

Free consultation: We visit your Altadena property, listen to your goals and look at the site.
Design and written estimate: You get a clear scope and an itemized price before anything starts.
Permits and scheduling: We handle plans, permits and the construction schedule.
Build and final walkthrough: Our crew builds, passes inspections and walks you through the finished work.

What our customers say

“During our first conversation with Jenny from AAA, we realized that they would execute our vision perfectly. They helped us create our dream bedroom in under 5 weeks!” — Maritza, Tarzana, CA

Altadena Garage Conversions FAQ

Is a garage conversion cheaper than a new ADU?

Usually, because the foundation, walls and roof already exist. The final price depends on the condition of the structure and whether you add a kitchen and bathroom.

Do I have to replace the parking I lose?

Under California ADU law, replacement parking is generally not required when a garage is converted to an ADU. We verify this for your specific Altadena property.

How long does a garage conversion take?

Construction typically runs 8 to 14 weeks after permits are issued, depending on scope.

Do you serve all of Altadena?

Yes. We work throughout Altadena and the surrounding Los Angeles County communities from our North Hollywood office. Call 844-975-5512 to schedule a free estimate.

More services in Altadena

Garage Conversion Contractor near Altadena

AAA All Star Construction Inc. · Licensed California General Contractor CSLB #1018926 · Call 844-975-5512

At AAA All Star Construction Inc, we bring your vision to life with unmatched craftsmanship and dedication. Trust us to transform your space into something extraordinary, where quality meets innovation.