Trusted General Contractor Serving San Diego County
See why homeowners and businesses throughout San Diego, Chula Vista, Coronado, Del Mar, Solana Beach, Encinitas, Carlsbad, Oceanside, Vista, Escondido, Alpine, Ramona, Julian, and Fallbrook trust Bernal Builders for remodeling, ADUs, construction, engineering services, inspections, and concrete work.
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Bernal Builders is a trusted General Contractor San Diego homeowners and businesses rely on for quality craftsmanship and clear communication. As a full-service Construction Company San Diego residents can count on, our team handles everything from structural work to detailed finishes. Whether you need Home Remodeling San Diego projects like kitchen and bath upgrades, an experienced ADU Builder San Diego for accessory dwelling units, or a dedicated Residential Contractor and Commercial Contractor for larger construction and engineering scopes, Bernal Builders delivers licensed, insured service across all of San Diego County.
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Trust & Qualifications
Licensed General Contractor
SDG&E Signatory Contractor
Veriforce Certified
Residential & Commercial Construction
Free Estimates Available
Serving All of San Diego County
ADU Development & Garage Conversions — San Diego
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Turn Your Garage Into an ADU or Build a New ADU
We convert unused garages into comfortable, code-compliant ADUs and provide full ADU development services — including design, permitting, and construction — to guide your project from concept to completion.
- Increase property value with a legal Garage ADU or new ADU
- Generate steady rental income from an independent unit
- Expedited permitting assistance to speed approvals
Why ADU Development & Garage Conversions
Cost-effective ADUs & Garage Conversions — Faster than full additions, boost property value, and unlock rental income
ADU development and garage conversions are among the most cost-effective ways to add living space in San Diego. Because much of the structure already exists, projects are typically faster and less disruptive than full home additions, and our experienced ADU builders guide permitting and approvals to streamline the process.
Converting a garage into an ADU maximizes your property's value and creates rental income potential. Whether you want a private suite for family or a long-term rental, a well-designed ADU delivers strong returns while complying with San Diego ADU regulations.
- Lower cost than building a new stand-alone ADU.
- Faster timelines than full home additions because we work within the existing structure.
- Increases property value and expands rental income potential.
- Uses your current footprint — no major changes to your yard or setbacks.
- Our team assists with permits and code compliance to speed approvals.
Our team evaluates your existing garage or property to design a safe, comfortable, and fully code-compliant ADU that meets your goals and maximizes return on investment. We manage permits, inspections, and approvals to reduce headaches and keep your project on schedule.
Our Services
Turnkey ADU Development & Garage Conversion in San Diego
We deliver turnkey ADU development and garage conversions from design through permits and construction, with a single experienced contractor managing the entire project.
Garage to ADU Conversions
Complete turnkey transformation of existing garages into fully functional ADUs — we handle design, permits, construction, insulation, framing, windows, doors, and climate-appropriate upgrades for San Diego.
Custom Design & Planning
Space planning, floor plans, and interior layouts are delivered as part of our turnkey service — designs are optimized for comfort, light, rental appeal, and seamless construction.
Permits & Code Compliance
We manage all drawings, permit submissions, and coordination with the City of San Diego, delivering permit-ready documents and handling approvals as part of our end-to-end service.
Structural Upgrades
Foundation repairs, framing, seismic upgrades, and roof work are completed to meet California codes as part of our full-project delivery, ensuring a safe, code-compliant dwelling.
Plumbing, Electrical & HVAC
New sewer connections, water lines, electrical panel upgrades, HVAC systems, and ventilation are specified and installed as part of our turnkey ADU build for efficiency and comfort.
Full Interior Build-Out
Kitchens, bathrooms, tile, flooring, lighting, paint, and built-ins — we deliver a complete interior build-out so your ADU is move-in ready and optimized for rental or living.
Why Choose Us
San Diego ADU & Garage Conversion Specialists
We specialize in ADU development and garage conversions across San Diego—combining deep local zoning and permitting expertise with design choices focused on strong rental and resale value. Our local knowledge reduces delays, avoids common pitfalls, and helps projects deliver maximum ROI.
- Local San Diego ADU and garage-conversion specialists with in-depth knowledge of city and county codes.
- Experienced in permits and plan submittals to streamline approvals and avoid costly revisions.
- Turnkey service: concept design, permitting, construction, inspections, and handover.
- Proven project delivery with on-time, on-budget track record and dedicated project managers.
- ROI-focused design and construction to maximize rental income and long-term property value.
- Guidance on financing options, realistic timelines, and cost estimates to help you make informed decisions.
- Transparent communication and detailed proposals at every project stage.
From initial feasibility and permit strategy to final walkthrough, your dedicated project manager will coordinate financing guidance, manage realistic timelines, and keep every milestone on track for a successful Garage Conversion San Diego project.
Recent ADU & Garage Conversion Projects
Before-and-after garage conversions and new ADU builds — modern, rentable living spaces
We transform garages into bright, functional homes and build new ADUs designed for long-term rental or comfortable guest and in-law use, with durable finishes suited to daily living and the rental market.
Common project types:
• Studio ADUs
• 1-BR ADUs
• 2-BR ADUs
• Garage conversions optimized for rental or guest use
Before
After
Homeowner Reviews — ADU & Garage Conversions
Trusted by San Diego homeowners
Real stories from homeowners who chose us for ADU projects and garage-to-ADU transformations that created legal, income-producing spaces.
“We interviewed a few contractors, but these guys clearly knew San Diego’s ADU rules and walked us through everything. Our old detached garage is now a beautiful one-bedroom ADU that rented within a week of finishing. The process was organized and the quality shows in every detail.”
Sarah & Miguel • Garage-to-ADU, North Park
“From the first feasibility visit to the final inspection, the communication was excellent. We always knew what was happening next. They handled all the permits and neighbors’ questions, and the crew kept the site clean. I’d happily recommend them to anyone considering an ADU or garage-to-ADU conversion.”
James R. • Garage-to-ADU, Clairemont
“We wanted a comfortable ADU for my mom that didn’t feel like a converted garage. The team suggested smart layout changes, added bigger windows, and helped us choose finishes that match our main house. It feels like a brand-new small home. The whole process was much smoother than we expected.”
Linda K. • ADU Conversion, La Mesa
Free ADU & Garage Conversion Feasibility Check
See If Your Garage Or Property Qualifies
Request a free consultation and our team will review your property for setbacks, utility access, parking requirements, and structural feasibility for ADU or garage conversions. You’ll receive a clear next step tailored to your property.
No pressure, no sales pitch — just an honest look at what’s possible with your garage and what it will take to convert it to a legal ADU.
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Stop letting your garage go to waste — Build an ADU
Convert your garage into a high-performing, code-compliant ADU that generates reliable rental income. Our San Diego ADU specialists manage permitting, design, and construction to deliver energy-efficient, tenant-ready units that maximize your return on investment.
Use this page as your starting point: click below to book your free estimate, share this link from Google Maps, or send it in a quick SMS follow-up to explore your options.
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