Home Addition in Presidio Heights
Custom Home builds home additions in Presidio Heights at $600-$900 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 Presidio Heights?
Home additions in Presidio Heights typically cost $600-$900 per square foot in 2026. A 500 sqft addition ranges from $300K to $450K. Custom Home's design phase locks in your exact cost before construction starts.
Why Expand Your Presidio Heights Home
When your Presidio Heights estate needs more space, expanding the existing structure preserves your established location, mature landscaping, and neighborhood standing while adding the rooms and features your family needs. San Francisco’s historic housing stock, steep grades, and strict codes make experienced builders essential.
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 Presidio Heights
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 Presidio Heights.
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 Presidio Heights Additions
Presidio Heights 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.
Presidio Heights Home Addition Permits
San Francisco’s Department of Building Inspection (DBI) manages all residential construction permits in Presidio Heights. Depending on scope, projects may also require Planning Department review under the city’s Residential Design Guidelines. Plan review for major remodels and new construction typically takes 8-14 weeks. Properties adjacent to the Presidio may face additional environmental and design considerations.
Custom Home manages the entire addition permitting process, including structural engineering review, plan submittal, and inspection coordination. Our experience with Presidio Heights’ requirements helps keep the approval process on track.
Pricing for Home Addition in Presidio Heights
Home addition costs in Presidio Heights typically run $600-$900 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.
Presidio Heights Permit Requirements
San Francisco's Department of Building Inspection (DBI) manages all residential construction permits in Presidio Heights. Depending on scope, projects may also require Planning Department review under the city's Residential Design Guidelines. Plan review for major remodels and new construction typically takes 8-14 weeks. Properties adjacent to the Presidio may face additional environmental and design considerations. Custom Home manages the full addition permitting process, including structural engineering review.
Home Addition in Presidio Heights: FAQ
How much does a home addition cost in Presidio Heights?
Home additions in Presidio Heights typically cost $600-$900 per square foot. A 400 sqft room addition generally ranges from $240K to $360K. 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 Presidio Heights?
Home additions in Presidio Heights 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.