Home Addition in Los Gatos
Planning a home addition in Los Gatos? Custom Home builds additions at $450-$700 per square foot. Whether you need a second-story addition, ground-floor expansion, or bump-out, our two-phase process delivers 3D visualization and itemized pricing before construction starts.
How much does a home addition cost in Los Gatos?
Home additions in Los Gatos typically cost $450-$700 per square foot in 2026. A 500 sqft addition ranges from $225K to $350K. Custom Home's design phase locks in your exact cost before construction starts.
Why Expand Your Los Gatos Home
Los Gatos’ strong property values and desirable neighborhoods make home additions a smart investment. Rather than uprooting to a new location, expanding your current home lets you stay in the community you chose. Silicon Valley’s tech-driven economy supports strong demand for modern, energy-efficient residences.
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 Los Gatos
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 Los Gatos.
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 Los Gatos Additions
Los Gatos is located in a seismically active region, which means home additions must meet current seismic codes. Custom Home’s engineering team handles foundation evaluation, load-bearing wall modifications, and seismic design for every addition project. Whether you are adding a second story or expanding your footprint, structural engineering is included in our Phase 1 design process.
Los Gatos Home Addition Permits
Los Gatos Community Development handles building permits for residential projects. Standard plan review takes 4-6 weeks, with hillside development projects potentially requiring additional review. The town’s Architecture and Site Application process applies to new construction and significant exterior changes.
Custom Home manages the entire addition permitting process, including structural engineering review, plan submittal, and inspection coordination. Our experience with Los Gatos’ requirements helps keep the approval process on track.
Pricing for Home Addition in Los Gatos
Home addition costs in Los Gatos typically run $450-$700 per square foot, similar to new construction pricing. Second-story additions may cost more due to structural reinforcement requirements. Custom Home's Phase 1 design process locks in exact pricing before construction begins.
Los Gatos Permit Requirements
Los Gatos Community Development handles building permits for residential projects. Standard plan review takes 4-6 weeks, with hillside development projects potentially requiring additional review. The town's Architecture and Site Application process applies to new construction and significant exterior changes. Custom Home manages the full addition permitting process, including structural engineering review.
Home Addition in Los Gatos: FAQ
How much does a home addition cost in Los Gatos?
Home additions in Los Gatos typically cost $450-$700 per square foot. A 400 sqft room addition generally ranges from $180K to $280K. Second-story additions may cost more due to structural reinforcement. Custom Home locks in exact pricing during Phase 1.
How long does a home addition take in Los Gatos?
Home additions in Los Gatos typically take 6-12 months from design to completion. Second-story additions require 8-14 months due to additional structural work. Custom Home's design phase ensures construction runs efficiently and on schedule.
Do I need to move out during a home addition in Los Gatos?
For most additions, you can remain in your home during construction. Second-story additions may require temporary relocation during certain phases. Custom Home plans the construction sequence during the design phase so you know what to expect.