Home Addition in Menlo Park
Planning a home addition in Menlo Park? Custom Home builds additions at $475-$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 Menlo Park?
Home additions in Menlo Park typically cost $475-$700 per square foot in 2026. A 500 sqft addition ranges from $238K to $350K. Custom Home's design phase locks in your exact cost before construction starts.
Why Expand Your Menlo Park Home
Menlo Park’s 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. Established neighborhoods and proximity to both San Francisco and Silicon Valley create consistent demand for quality construction.
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 Menlo Park
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 Menlo Park.
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 Menlo Park Additions
Menlo Park 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.
Menlo Park Home Addition Permits
Menlo Park’s Community Development department handles residential building permits. Plan review for custom homes typically takes 4-8 weeks. Projects requiring design review or variances go before the Planning Commission. The city offers pre-application consultations to help homeowners understand requirements before submitting formal plans.
Custom Home manages the entire addition permitting process, including structural engineering review, plan submittal, and inspection coordination. Our experience with Menlo Park’s requirements helps keep the approval process on track.
Pricing for Home Addition in Menlo Park
Home addition costs in Menlo Park typically run $475-$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.
Menlo Park Permit Requirements
Menlo Park's Community Development department handles residential building permits. Plan review for custom homes typically takes 4-8 weeks. Projects requiring design review or variances go before the Planning Commission. The city offers pre-application consultations to help homeowners understand requirements before submitting formal plans. Custom Home manages the full addition permitting process, including structural engineering review.
Home Addition in Menlo Park: FAQ
How much does a home addition cost in Menlo Park?
Home additions in Menlo Park typically cost $475-$700 per square foot. A 400 sqft room addition generally ranges from $190K 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 Menlo Park?
Home additions in Menlo Park 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.
What is the difference between a bump-out and a full addition?
A bump-out extends an existing room by a few feet, while a full addition creates entirely new enclosed space. Bump-outs are smaller in scope and cost, while full additions offer more design flexibility. Custom Home helps you determine the right approach during Phase 1.