ADU Construction South San Francisco
Licensed ADU contractor specializing in South San Francisco and San Mateo County projects.
South San Francisco property owners are adding accessory dwelling units to create rental income and solve housing challenges. We build custom ADUs, garage conversions, and backyard cottages that meet city codes and maximize your property value.
Build Your ADU in San Francisco
San Francisco housing costs push families to find creative solutions. Adding an accessory dwelling unit creates immediate rental income while keeping family close. South San Francisco’s updated ADU regulations make construction faster with streamlined permits and fewer restrictions.
Your property likely qualifies for an ADU if you have a single-family home with adequate lot size. We handle feasibility studies, permit applications, and complete construction from foundation to final inspection.
Licensed Contractor #1104331 | Serving South San Francisco Since 2023
ADU Kitchen Installation
Complete kitchen builds with custom cabinets, countertops, appliances, and plumbing. We design efficient layouts that maximize functionality in compact spaces while meeting rental property standards.
ADU Bathroom Construction
Full bathroom installation including tile work, fixtures, ventilation, and accessibility features. All plumbing work meets city codes with proper permitting and inspections.
ADU Electrical Installation
Separate electrical systems for ADU units including new meter installations, panel upgrades, and complete wiring. Licensed electricians handle all connections and city inspections.
ADU Foundation Work
Concrete foundation construction for detached units including excavation, rebar placement, and seismic reinforcement. All foundation work meets South San Francisco building requirements.
Energy-Efficient ADU Features
Modern ADU construction includes energy-efficient windows, insulation, HVAC systems, and LED lighting. These features reduce utility costs and increase rental desirability.
Detached ADU Construction
Standalone accessory dwelling units in your backyard provide maximum privacy and rental potential. We design detached ADUs up to 1,200 square feet with full kitchens, bathrooms, and separate utility connections. Perfect for long-term tenants or multi-generational housing.
Garage Conversion ADU Services
Converting existing garages creates living space without new foundation work. We handle structural modifications, electrical upgrades, plumbing installation, and code compliance. Most garage to ADU conversions complete within four months.
Attached ADU Construction
Connected to your main house but with independent access, attached ADUs work well for family members needing privacy. We build additions that match your home’s architecture while meeting setback requirements.
Basement ADU Conversion
Converting basements into accessory dwelling units maximizes existing space. We address moisture control, ceiling height requirements, egress windows, and ventilation systems to create comfortable living areas.
Junior ADUs (JADUs)
Smaller units up to 500 square feet created within your existing home. These cost-effective options work well for students, seniors, or anyone needing basic living space with shared utilities.
Perfect for Modern Living Needs: Convert unused space into a home office that doubles as guest quarters. Create a rental unit for passive income without major construction. Design an in-law suite for aging parents who want independence while staying close to family.
Popular JADU Conversions:
- Home office with kitchenette – Work from home with a separate entrance
- Student housing – Affordable living space for college students or young adults
- Senior living quarters – Accessible design for aging in place
- Guest suite – Private space for visitors with small kitchen facilities
- Rental income unit – Generate monthly income from existing square footage
Cost-Effective Benefits: JADUs require minimal permits compared to full ADUs, making them faster and more affordable to build. Share utilities with your main house to keep costs low while maintaining separate living space. Perfect for multi-generational living or creating flexible living spaces that adapt to your changing needs.
Most JADU projects convert existing bedrooms, garage areas, or basement space into functional living units. Add value to your South San Francisco property while meeting the growing demand for affordable housing options and flexible work spaces.
ADU Permit Assistance South San Francisco
South San Francisco requires permits for all ADU construction. We manage the entire approval process including:
ADU Feasibility Studies – Site analysis to determine optimal ADU placement and size within zoning constraints
Custom ADU Floor Plans – Architectural drawings that maximize space while meeting building codes
ADU Zoning Compliance – Ensuring setbacks, height limits, and lot coverage requirements are met
Permit Application Management – Submitting plans and coordinating with city planning department
Building Inspection Services – Scheduling required inspections throughout construction phases
Most ADU permits in South San Francisco qualify for ministerial approval, reducing review time to 60 days maximum.
ADU Project Timeline
Construction schedules vary by project complexity:
- Garage conversions: 3-4 months including permits
- Basement conversions: 4-5 months with structural work
- Detached ADUs: 6-8 months from permits to completion
- Attached additions: 5-7 months depending on size
Permit approval typically adds 2-3 months to project start dates. We provide detailed construction schedules during initial consultation.
South San Francisco ADU Regulations
Current city requirements for accessory dwelling units:
- Size limits: Up to 1,200 square feet for detached ADUs, 50% of primary dwelling for attached units
- Setback requirements: 4-foot minimum from rear and side property lines
- Height restrictions: 16 feet maximum for most residential zones
- Parking requirements: No additional parking needed within half-mile of transit stops
- Owner occupancy: Property owner must live in either main house or ADU
We stay current with changing regulations to ensure your project meets all requirements.
Enjoy Your New Home Addition
Whether you're looking for a new home office space or want to re-design your home completely, team up with us.
ADU contractors near me
Many South San Francisco families choose ADUs for aging parents or adult children. We design accessible features including:
- Wider doorways and hallways
- Roll-in showers with grab bars
- Single-floor living layouts
- Separate entrances for independence
- Universal design elements
Multi-generational ADUs provide family support while maintaining privacy for all residents
Top Rated ADU Contractor in South San Francisco
Romy Construction offers premier home addition services in San Francisco, specializing in ADUs and remodeling projects. Our expert team ensures quality and satisfaction.
Get Started with Your ADU Project
Schedule a consultation to discuss your accessory dwelling unit options. We’ll assess your property, explain permit requirements, and provide detailed project estimates.
What we cover during consultation:
- Property feasibility assessment
- ADU design options for your lot
- Permit requirements and timeline
- Construction cost estimates
- Zoning compliance review
Romy Construction Inc serves South San Francisco, San Mateo County, and surrounding Bay Area communities. Licensed general contractor specializing in ADU construction and home additions.
Phone: (415) 813-7931
Email: info@romyconstructioninc.com
Licensed Contractor #1104331
Common ADU Questions South San Francisco
Find answers to common questions about a kitchen renovation process. Get the information you need to make an informed decision about your next step.
Most single-family properties in South San Francisco qualify for ADU construction. Your lot needs adequate space for setbacks and utility connections. Properties with existing garages or large backyards work best. We provide free property assessments to determine ADU feasibility and optimal placement.
Yes, all ADUs require building permits in South San Francisco. The good news is most projects qualify for streamlined ministerial approval, reducing review time to 60 days maximum. We handle all permit applications, plan submissions, and inspection coordination throughout your project.
South San Francisco allows ADU rentals as long as the property owner lives in either the main house or the ADU. Many homeowners generate substantial monthly rental income while maintaining property owner occupancy requirements. Short-term rentals like Airbnb may have additional restrictions.
Construction timelines depend on project complexity. Garage conversions typically complete in 3-4 months, while new detached ADUs take 6-8 months including permits. Weather, inspection schedules, and change orders can affect completion dates. We provide realistic timelines during project planning.
Junior ADUs (JADUs) are smaller units up to 500 square feet created within existing homes, while standard ADUs are separate dwelling units with full kitchens and bathrooms. JADUs cost less to build but offer limited rental income potential compared to full ADUs.
Basement ADU conversions are possible but require meeting ceiling height, egress window, and ventilation requirements. We handle moisture control, structural modifications, and code compliance issues common with basement conversions. Not all basements qualify due to height or access limitations.
Locally Trusted Since 2023 – Specializing in South San Francisco, San Francisco County, Marin County & San Mateo County
Our Bay Area clients consistently praise how we blend regional expertise with quality craftsmanship to deliver exceptional results. Having served local homeowners since 2023, we’ve mastered the unique challenges of home renovations—from coastal humidity considerations to navigating strict permitting processes—ensuring every project meets both your vision and local standards.
- Concord, CA
- Hayward, CA
- Oakland, CA
- Tiburon, CA
- Millbrae, CA
- Pacifica, CA
- Richmond, CA
- Daly City, CA
- Palo Alto, CA
- San Bruno, CA
- San Mateo, CA
- San Rafael, CA
- San Leandro, CA
- Santa Clara, CA
- South San Francisco, CA
- Redwood City, CA
- Mountain View, CA,
- San Francisco, CA
- Milpitas, CA
- Burlingame, CA