Home Addition in Half Moon Bay

Why Expand Your Half Moon Bay Home

For Half Moon Bay homeowners who love their neighborhood but need more space, a home addition is often more practical than buying a larger home. You keep your location, your neighbors, and your established landscaping. Coastal construction requires salt-air-resistant materials, wind-rated designs, and compliance with the Local Coastal Program.

Custom Home designs and builds home additions with the same two-phase process we use for custom homes. You see the complete addition in 3D and receive itemized pricing before construction begins.

Types of Home Additions We Build in Half Moon Bay

Second-Story Additions

Double your living space by building up rather than out. Second-story additions are ideal when lot coverage limits prevent ground-floor expansion. Custom Home’s structural engineers evaluate your existing foundation to determine what reinforcement is needed.

Ground-Floor Room Additions

Extend your home’s footprint with new bedrooms, family rooms, or home offices. Ground-floor additions integrate with your existing layout and maintain single-level living, which is especially valued in Half Moon Bay.

Bump-Outs and Extensions

Smaller expansions that make a significant difference: extend your kitchen, enlarge a bathroom, or add a sunroom. Bump-outs typically cost less and complete faster than full additions.

Structural Considerations for Half Moon Bay Additions

Home additions in Half Moon Bay require careful structural planning to ensure the new space integrates safely with the existing structure. Custom Home’s engineering team handles foundation evaluation, load-bearing wall modifications, and structural design. Whether you are adding a second story or expanding your footprint, structural engineering is included in our Phase 1 design process.

Half Moon Bay Home Addition Permits

Half Moon Bay’s Building Division administers permits for residential construction within city limits. All projects in the coastal zone must comply with the Local Coastal Program, and properties near sensitive habitats or bluffs may require a Coastal Development Permit. Plan review for custom homes typically takes 8-12 weeks. Custom Home helps clients navigate these layered requirements from the start of the design process.

Custom Home manages the entire addition permitting process, including structural engineering review, plan submittal, and inspection coordination. Our experience with Half Moon Bay’s requirements helps keep the approval process on track.