A1 ADU Contractor is a licensed California general contractor specializing in ADU construction and garage conversions in Los Angeles County, including the San Fernando Valley neighborhoods of Sherman Oaks and Granada Hills. Services include garage-to-ADU conversions, ground-up custom ADU builds, prefab ADU installation, and full project management from design and permitting through construction. Typical uses: rental units, family suites, home offices, or creative studios. End-to-end service focuses on converting existing garage footprints into legal living spaces. For a consultation or quote, visit our website or give us a call.
Serving since 2012ADU & garage conversionsSan Fernando ValleyLos Angeles CountyBased in Sherman Oaks5.0 on GooglePermitting handled100% inspection successCustom ADU designGarage to ADU builds
Services
Garage to ADU conversion
Transforming existing 1-car, 2-car, or detached garages into fully independent, habitable living units complete with full kitchens, modern bathrooms, private entrances, and dedicated HVAC systems.
ADU design
Custom ADU design services creating optimized layouts that meet local building regulations and energy efficiency standards.
ADU construction
Full-service ADU construction including ground-up detached accessory dwelling units, attached ADUs, and Junior ADUs (JADUs). Handles 100% of permitting, floor plans, structural calculations, and city inspections.
Custom ADU construction
Design and construction of custom ground-up detached or attached accessory dwelling units tailored to exact property layout.
2 car garage ADU conversion
Conversion of multi-car garages into ADU living spaces, optimizing narrow San Fernando Valley lots with intelligent space planning.
This company did an outstanding job building my ADU. The crew was very skilled and worked with great precision. They explained everything clearly and kept me updated regularly. I liked their organized approach and professional attitude. The materials used were high quality and built to last. The final structure looks beautiful and modern. They completed the project on time and within budget. Everything was handled smoothly. Very trustworthy company.
Harrison Reed
May 1, 2026
They handled our garage ADU project with real professionalism from beginning to end. Questions were answered quickly and progress stayed steady. The crew worked carefully and never rushed important details. The finished unit feels modern and well built. We would absolutely use them again.
Nick Kranen
Jun 15, 2026
Converted our garage into a full ADU and it’s now a great rental unit. The construction quality is excellent—good insulation, nice finishes, and smart layout. The crew kept everything on schedule and communicated clearly throughout.
Xenrick
Jul 25, 2026
Our garage had a lot of potential and they helped bring it to life. The crew handled the conversion with skill and care. They stayed on schedule and delivered what was promised. The ADU feels open and practical. We are very happy with how everything turned out.
Alonso xavi
May 23, 2026
A1 ADU made the garage conversion process smooth and straightforward. They explained everything clearly and followed through on their promises. The work area stayed clean and organized. The finished ADU looks modern, functional and stands out in many houses have visited in Sherman Oaks
Mason Cole
May 19, 2026
Why choose us?
ADU conversion
We focus on turning garages into livable ADUs, from full kitchen and bathroom units to home offices, in-law suites, studios, and legal rental dwellings.
Permitting handled
Our team manages the full permitting process, including floor plans, structural calculations, and city inspections, so your project stays on track with local codes.
100% inspection success
We back our permitting and construction work with a record of 100% first-try inspection success, which keeps your project moving without costly do-overs.
Serving the Valley
We work across the San Fernando Valley and Los Angeles County, including Studio City, Encino, Van Nuys, Glendale, Burbank, Tarzana, and many nearby communities.
Published starting prices
Several of our conversions carry upfront starting prices, such as home offices from $25,000, so you can plan your budget before committing to a project.
5.0 on Google
Homeowners have given us a 5.0 rating across 57 Google reviews, reflecting the care we put into every garage and ADU conversion we take on.
13701 Riverside Dr #200, Sherman Oaks, California, 91423
FAQs
What areas do you serve?
We are based in Sherman Oaks and work throughout the San Fernando Valley and Los Angeles County. That includes Glendale, Burbank, Van Nuys, North Hollywood, Reseda, Bel Air, Mission Hills, Sylmar, Pacoima, Sun Valley, Encino, Studio City, Panorama City, Canoga Park, Tarzana, Valley Village, Toluca Lake, San Fernando, Valley Glen, Lake Balboa, Granada Hills, Winnetka, and North Hills.
What types of garage conversions do you offer?
We convert garages into full ADUs with kitchens and bathrooms, home offices, in-law suites, studio apartments, guest rooms, and legal rental units. We also build specialty spaces such as home gyms, yoga and fitness studios, art studios, home theaters, music studios, wine cellars, and more. On top of conversions, we handle ground-up detached ADUs, attached ADUs, Junior ADUs, and two-story units above an existing garage.
Do you handle permits and plans?
Yes. We manage the full process, including custom design, floor plans, structural calculations, and city inspections. We prepare permit-ready plans that meet local zoning, building codes, and Title 24 energy standards so you do not have to coordinate the paperwork yourself.
What does pricing look like?
Several conversions carry published starting prices. A garage to home office starts from $25,000, a garage to studio apartment runs $50,000 to $80,000, and a garage to home gym runs $30,000 to $55,000. Final pricing depends on the size, finishes, and whether new utility connections are needed. Call us at (424) 500-0950 for a quote tailored to your property.
Can I convert my garage into a rental unit?
Yes. We convert garages into legal rental dwelling units that can generate passive income, built to meet building codes and utility requirements. We also handle detached garage conversions into fully independent ADUs.
What inspection record do you stand behind?
We back our permitting and construction work with a record of 100% first-try inspection success, which helps your project pass city review without avoidable delays.
How can I get in touch?
Call us at (424) 500-0950 or reach out through the contact form on our website. We are glad to review your garage, discuss your goals, and put together a quote.
