Home Additions

Home Additions in Riverside, CA

When your family outgrows your home, a well-planned addition gives you the space you need without the disruption and expense of selling and moving. Home additions in the Inland Empire require careful engineering, thorough knowledge of California building code, and an understanding of how the new structure integrates with your existing home’s foundation, framing, roofline, electrical panel, plumbing, and HVAC system.

BPP Construction has been building home additions across Riverside and San Bernardino counties for 35 years. Ben has handled everything from modest single-room bump-outs to complete second-story additions that double a home’s living space. His deep experience with the Inland Empire’s building stock means he understands how homes in this area are typically constructed, what foundation types are common, and what challenges arise when connecting new construction to existing structures in Southern California’s expansive clay soils.

Every addition we build is fully engineered by a licensed structural engineer, permitted through the local building department, and inspected at every required phase. We handle the entire process from initial feasibility assessment and zoning verification through engineering, permits, construction, and final sign-off.

BPP Construction builds every type of residential addition permitted under California building code and local zoning ordinances. The right approach depends on your property’s lot coverage, setback requirements, zoning designation, and existing structural conditions.

• Single-room ground-floor additions — bedrooms, family rooms, home offices
• Multi-room additions expanding the footprint of the home
• Second-story additions over existing single-story structures
• Garage conversions to livable space (with or without replacement garage)
• Accessory Dwelling Units (ADUs) — detached or attached, compliant with California ADU law
• Junior Accessory Dwelling Units (JADUs) converted from existing space
• Bump-outs and cantilever extensions for kitchens and bathrooms
• Sunroom and enclosed patio additions

Second-story additions are among the most complex residential construction projects. The existing first-floor structure must be evaluated and typically reinforced to carry the additional load. Foundation upgrades may be required — particularly in areas of Riverside and San Bernardino counties with expansive clay soils, where existing foundations may need deepening or underpinning to support the increased weight.

California’s ADU laws have made accessory dwelling units increasingly popular in the Inland Empire. State legislation limits the restrictions cities can impose on ADUs, creating opportunities for homeowners to add rental income or multigenerational living space. BPP Construction builds both attached and detached ADUs, handling the specific code requirements for independent living units including separate electrical service, plumbing, parking requirements, and fire separation.

Every addition must comply with California Title 24 energy standards, which include insulation requirements, window performance ratings, HVAC efficiency standards, and lighting efficacy requirements. We design every addition to meet or exceed these standards, and we coordinate the required HERS testing as part of the project scope.