Garage Conversion ADU

Garage to ADU conversion in San Diego.

+1-619-330-8185

TRUSTED BY SAN DIEGO HOMEOWNERS

Our Credentials & Reviews

★★★★★

5.0 Rating

★★★★★

5.0 Rating

Preferred Contractor

A+ Rating

★★★★★

5-Star Business

NRCA Member

Recent Project

Completed modern detached ADU in San Diego backyard

Before

After

Detached 400 sq ft ADU — San Diego backyard, permits included

Maximize Existing Space

Peak Builders specializes in garage-to-ADU conversions throughout San Diego. Converting an existing garage typically costs 30-40% less than new construction and takes half the time. If you rarely use your garage for parking, it may be your best ADU opportunity.

Lowest cost ADU option

Fastest completion time

No new foundation needed

Existing structure and roof

Often bypasses setback issues

Peak Builders & Roofers of San Diego provides professional garage conversion adu services throughout San Diego. Our experienced team delivers quality workmanship and reliable results for every project. We understand the specific needs of San Diego homes and tailor our approach accordingly.

We stand behind our work with clear communication, fair pricing, and attention to detail. Every project receives the same level of care, from initial consultation through final walkthrough. Your satisfaction is backed by our warranties and responsive service team.

Our Work

Garage Conversion ADU in San Diego — Project Photos

Garage conversion to ADU interior San Diego

Why Choose Us

Quality Craftsmanship You Can Trust

With over 15 years of experience serving San Diego homeowners, we bring expertise, quality materials, and exceptional craftsmanship to every project. Our team is fully licensed, bonded, and insured for your peace of mind.

Your project, our proven process.

Free Consultation

We visit your home, discuss your vision, and provide a detailed estimate with no obligation.

Design & Planning

Our team creates custom plans and handles all permits with the city of San Diego.

Expert Construction

Licensed craftsmen bring your project to life with quality materials and workmanship.

Final Walkthrough

Inspection, quality assurance, and warranty coverage ensure your complete satisfaction.

Conversion Options

Single-Car Garage Conversion

Convert 200-250 sq ft garage into efficient studio with bath and kitchenette.

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Two-Car Garage Conversion

Convert 400-500 sq ft into full one-bedroom apartment with living area.

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Garage + Addition

Convert garage and add square footage for larger living space.

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Above-Garage ADU

Keep garage function, add living unit above.

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Testimonials

Real projects. Real results.

Hear from San Diego homeowners who trusted Peak Builders with their most important investment.

Sarah M.

Peak Builders transformed our outdated kitchen into a stunning modern space. Their attention to detail and craftsmanship exceeded our expectations.

Kitchen Remodel, San Diego

Michael & Jennifer T.

We hired Peak Builders to finish our basement and couldn't be happier. They handled permits, design, and construction seamlessly.

Basement Finishing, Poway

Robert K.

After a hail storm damaged our roof, Peak Builders made the insurance process easy. They documented everything and installed a beautiful new roof.

Roof Replacement, Chula Vista

Lisa & David P.

Our master bathroom went from dated to spa-like thanks to Peak Builders. The frameless shower and heated floors are exactly what we envisioned.

Master Bath Renovation, Oceanside

James H.

Peak Builders built an ADU in our backyard that's now generating rental income. They navigated San Diego's permit process expertly.

ADU Construction, San Diego

Amanda R.

We bought a 1970s home and Peak Builders helped us transform every room. It's like a brand new house. Amazing team!

Full Home Remodel, Vista

Carlos & Maria G.

Our outdoor kitchen from Peak Builders is the envy of the neighborhood. Built-in grill, pizza oven, and beautiful stone counters.

Outdoor Kitchen, Escondido

Patricia W.

Peak Builders remodeled our kitchen and two bathrooms. Having one contractor for the whole project made everything easier.

Kitchen & Bath Combo, Carlsbad

Thomas & Susan B.

We added a second story to our ranch home. Peak Builders matched the new addition perfectly to our existing home.

Home Addition, Santee

Read All 12+ Reviews

Garage Conversion FAQs

Yes. Attached and detached garage conversions are among the most cost-effective ADU paths. The existing slab, walls, and roof structure reduce new construction costs significantly.

Yes — the garage door opening becomes the new wall, which typically includes a window, a standard door, and insulated framing. We match the exterior finish to the main house.

Yes, unless you add parking elsewhere on the lot. Some cities require replacement parking; others have waived this requirement for ADU conversions near transit. We check your city's current rules at the consultation.

Garage conversions typically cost less than new detached builds because the structure already exists. The exact savings depend on the garage's existing condition — some garages need significant structural upgrades.

Insulation (walls, ceiling, floor), HVAC, plumbing for kitchen and bath, electrical panel upgrade, interior finishes, windows, and a proper entrance door. The garage slab may need a moisture barrier or flooring overlay.