Home Additions in San Diego

Room addition costs range from $250-$450+ per square foot in San Diego. A basic bedroom addition (12x12) costs $40,000-$80,000, while larger additions (400 sq ft) run $90,000-$200,000+. Second story additions are on the higher end due to structural requirements. Costs include design, permits, construction, and finishes.

Building up (second story) preserves yard space and often costs less per square foot in areas with limited lot space. Building out is simpler structurally and allows easier access during construction. The best choice depends on your lot size, zoning, and budget. We assess both options during consultation.

Most room additions take 4-8 months total. Design phase: 4-8 weeks. Permits: 4-8 weeks. Construction: 2-4 months for single-story, 4-6 months for second story. Timeline varies based on size, complexity, weather, and permitting.

Usually not, though it depends on the addition type. Bedroom and second-story additions typically allow you to stay. Kitchen or bathroom expansions may require temporary alternative arrangements for those specific spaces. We work to minimize disruption and maintain safe living conditions.

Yes! Our architects design additions that seamlessly integrate with your home's existing architecture, roofline, and exterior finishes. We match materials, siding, windows, and roof to ensure the addition looks like original construction.