Bay Area · CSLB #1086265
Room Addition
Bay Area Home Addition Contractor
Expand your Bay Area home with a permitted room addition. Horizontal additions, second-story additions, sunrooms, and family room expansions — design through construction.
Room Addition · Bay Area
Bay Area Room Addition Contractor — Expand Your Home, Not Your Stress
When your Bay Area home no longer fits your family's needs, a room addition is often the most cost-effective solution — especially in a market where moving up means paying $1M+ more for a larger home. Homee Renovation has completed room additions across San Francisco, San Mateo, Los Gatos, Cupertino, Palo Alto, and beyond, adding everything from master suite expansions to full second-story additions.
Room additions are among the most complex home improvement projects, requiring structural engineering, foundation work, roofing, and careful coordination with the existing structure. Homee Renovation's team has the experience to manage all of this — from initial feasibility assessment through final inspection — with a single accountable team.
Every Bay Area city has its own setback requirements, height limits, lot coverage rules, and design standards that govern what you can build and where. Our permit team has deep experience with these requirements across 15+ Bay Area cities and manages the full permit process on your behalf, including pre-application meetings, plan check coordination, and inspection scheduling.
Our wholesale material dealer relationships save clients 30%+ on windows, doors, flooring, cabinetry, and finishes for the new addition — and our in-house designer is included free with every project to ensure the addition integrates seamlessly with your existing home's aesthetic.
What's Included
Everything in Our Room Addition Service
Our Process
How We Deliver Your Room Addition
Feasibility Assessment
We assess your property's zoning, setbacks, lot coverage, and structural conditions to determine what addition is feasible and provide a preliminary budget estimate.
Design & Engineering
Our in-house designer develops addition floor plans and elevations. We coordinate with structural engineers to prepare permit-ready drawings.
Permit Application & Plan Check
We submit permit applications to your city's Building Division and manage the full plan check process, including responding to corrections.
Foundation & Framing
Foundation work, framing, roofing, and exterior work are completed by our licensed construction team. All work is inspected at key milestones.
Mechanical, Electrical & Plumbing
Electrical, plumbing, HVAC, and insulation are installed and inspected. We coordinate all trade work to maintain schedule.
Finish Work & Final Inspection
Drywall, flooring, painting, trim, and all finish work are completed. We coordinate the final inspection and obtain the Certificate of Occupancy.
Service Area
Room Addition Across the Bay Area
FAQ
Room Addition — Common Questions
How much does a room addition cost in the Bay Area?
Room addition costs in the Bay Area typically range from $200,000 to $600,000+ depending on size, complexity, and finish level. Second-story additions are generally more expensive than ground-floor additions due to structural requirements. Homee Renovation clients save 30%+ on materials through our wholesale relationships.
How long does a room addition take in the Bay Area?
A room addition in the Bay Area typically takes 4–8 months from permit approval to completion. Permit timelines vary by city and project complexity. Homee Renovation provides a detailed project schedule before work begins.
Do I need a permit for a room addition in the Bay Area?
Yes — all room additions require permits. The permit process involves plan check review by the Building Division and potentially the Planning Department. Homee Renovation manages the full permit process on your behalf.
What is the ROI of a room addition in the Bay Area?
Room additions in the Bay Area typically add more value than they cost, particularly in high-value neighborhoods. Adding a bedroom or bathroom can increase a home's value by $200,000–$500,000+ in many Bay Area markets. The ROI depends on the specific addition type, neighborhood, and execution quality.
Can I add a second story to my Bay Area home?
Yes — second-story additions are common in the Bay Area. They require structural engineering to assess the existing foundation and framing, and must comply with each city's height limits and design standards. Homee Renovation has completed second-story additions across multiple Bay Area cities.
Related Services
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Free estimate. Free design consultation. No obligation.