Home Additions in San Diego

When your family outgrows your current home, a room addition in San Diego offers the perfect solution to gain much-needed space without the hassle and expense of moving. One Stop Builders specializes in home additions throughout San Diego County, creating beautiful, functional spaces that seamlessly integrate with your existing home's architecture and enhance your property value.

Types of Home Additions We Build

Our comprehensive San Diego home addition services include bedroom additions for growing families, master suite expansions with spa-like bathrooms and walk-in closets, home office additions for remote work, family room or great room expansions, sunrooms and enclosed patios for indoor-outdoor living, second-story additions to maximize lot size, and bump-outs that expand existing rooms. Each project is custom designed to match your home's style, meet your specific needs, and comply with San Diego building codes.

Home Addition Costs in San Diego

The cost of a home addition in San Diego typically ranges from $150 to $500+ per square foot, depending on complexity, finishes, and structural requirements. A standard 400 sq ft bedroom addition averages $80,000-$150,000, while larger master suite additions (500-800 sq ft) range from $150,000-$300,000. Second-story additions cost more due to foundation reinforcement needs, typically $250-$500 per square foot. We provide detailed estimates that include architectural plans, permits, foundation work, framing, roofing, plumbing, electrical, HVAC extensions, finishes, and all aspects of your addition.

Home Addition Planning & Design

Successful room additions require careful planning to ensure seamless integration with your existing home. Our design process considers architectural style matching, proper scale and proportion, natural light optimization, traffic flow and access, structural feasibility, lot coverage and setback requirements, and utility connections. We create detailed architectural plans that show exactly how your addition will look and function, incorporating your input at every stage. Our 3D renderings help you visualize the completed space before construction begins.

Permits & Building Codes

Home additions in San Diego require proper permits and must comply with California building codes. We handle all permit applications for your addition, including structural engineering plans, energy compliance (Title 24), and coordination with City of San Diego building department. Common requirements include setback minimums from property lines, height restrictions, lot coverage limits, and fire safety standards. Our experience navigating San Diego's permitting process ensures approvals without delays or complications.

Foundation & Structural Considerations

Proper foundation work is critical for home additions in San Diego. We conduct thorough site evaluations to determine foundation requirements, which may include new concrete foundations matching your existing structure, foundation reinforcement for second-story additions, soil testing and engineering for hillside properties, and proper drainage to prevent water issues. Our licensed structural engineers design foundations that meet or exceed code requirements, ensuring your addition's long-term stability and performance.

Why Choose One Stop Builders for Your Home Addition

As a licensed general contractor in San Diego (License #1101128) with all trades in-house, we provide comprehensive addition services from design through completion. Our integrated team includes architects, structural engineers, licensed electricians, licensed plumbers, HVAC specialists, framers, roofers, and finish carpenters. This coordination ensures consistent quality, eliminates scheduling conflicts, and provides single-point accountability. With over 15 years of experience building additions throughout San Diego County, we deliver exceptional results that enhance your home's functionality and value.