Castro · San Francisco
Home Addition in Castro
Refresh & Build is a licensed San Francisco contractor specializing in home addition projects in Castro. The Castro's iconic Victorian and Edwardian homes demand skilled contractors who understand historic architecture.
Home Addition in Castro
The Castro's iconic Victorian and Edwardian homes demand skilled contractors who understand historic architecture. Refresh & Build brings precision craftsmanship to Castro renovation projects, preserving original details while delivering modern comfort.
Neighborhood Housing Stock
Victorian and Edwardian single-family homes and flats, many with original woodwork and details
Permit Notes for Castro
Historic district overlay in parts of the Castro requires design review for exterior changes. Interior renovations typically streamlined through SF DBI.
What's Included
- Room additions and bump-out additions
- Second-story and vertical additions
- ADU (Accessory Dwelling Unit) construction
- Garage-to-living-space conversions
- Foundation work and structural engineering
- Full architectural and design coordination
- SF DBI and Planning permit management
Typical Cost Range
$150,000–$500,000+
Free itemized quotes — no obligation
Home Addition in Castro — FAQ
How much does a home addition cost in Castro?
Home Addition costs in Castro typically fall within our San Francisco range of $150,000–$500,000+. Victorian and Edwardian single-family homes and flats, many with original woodwork and details can influence project complexity and cost. We provide free, detailed estimates after a site visit.
Do I need a permit for a home addition in Castro?
Yes — SF DBI permits are required for most home addition work in Castro. Historic district overlay in parts of the Castro requires design review for exterior changes. Interior renovations typically streamlined through SF DBI. Refresh & Build handles all permit applications and inspections on your behalf.
What is an ADU and how much does one cost in San Francisco?
An ADU (Accessory Dwelling Unit) is a secondary housing unit on your property — it can be a garage conversion, basement unit, or new detached structure. ADUs in San Francisco cost $80,000–$200,000 and can generate significant rental income to offset your mortgage.
How long does a home addition take in San Francisco?
Home additions typically take 4–9 months from start to finish. SF Planning and permit approval can take 3–6 months for complex additions. We help expedite the approval process and begin site prep work in parallel.
Home Addition in Nearby Neighborhoods
Other Services in Castro
Ready for Your Home Addition in Castro?
Get a free, no-obligation consultation. We'll visit your Castro home, assess the project, and provide a detailed quote.