San Francisco has one of the most ambitious solar policy frameworks in the United States. Combined with high electricity rates, aggressive climate targets, and citywide solar mandates, SF creates sustained demand for both new construction and retrofit solar across residential and commercial building stock. Solar design in SF navigates the SF Department of Building Inspection (DBI), PG&E interconnection, California Title 24 mandate, San Francisco's local solar ordinance, historic preservation review across large portions of the city, and California's strict fire code setback rules. This deep dive walks through each element.
San Francisco solar at a glance
- Permit authority: San Francisco Department of Building Inspection (DBI)
- State building code: California Building Code (Title 24) with San Francisco amendments
- State electrical code: California Electrical Code (based on NEC with California amendments); always verify current enforced edition with DBI
- Utility: PG&E (Pacific Gas and Electric)
- State solar mandate: California Title 24, Part 6 requires solar on new residential and much new commercial construction
- City solar mandate: San Francisco's Better Roofs Ordinance requires solar or living roofs on most new construction in the city
- Historic preservation: extensive historic districts and designated buildings across SF
SF DBI permit process for solar
The San Francisco Department of Building Inspection issues permits for solar installations in the city. Solar projects typically require:
- A building permit for structural, roof loading, attachment, and general construction
- An electrical permit for the electrical scope
- PE stamping for commercial and larger residential projects
- Historic preservation review for regulated buildings
- Fire code compliance verification
SF DBI has evolved online permit filing systems over time. Always confirm current filing platform, forms, and documentation requirements with DBI before submitting. SF DBI's review culture is generally rigorous, particularly on structural and fire code aspects.
San Francisco Better Roofs Ordinance
San Francisco enacted the Better Roofs Ordinance requiring most new construction in the city to incorporate solar photovoltaic, solar thermal, living (green) roofs, or a combination of both across a specified percentage of roof area. Certain building types and roof configurations are exempt. Key design implications:
- New residential and commercial construction generally must accommodate solar or green roof designs
- Solar system size for mandate compliance follows the ordinance methodology
- Combined solar plus green roof configurations require coordinated structural design
- Documentation demonstrating mandate compliance is filed with the DBI building permit application
Working with SF developers, architects, and general contractors on Better Roofs Ordinance projects is a specific market niche for solar design teams with SF-specific expertise.
PG&E interconnection in San Francisco
PG&E serves San Francisco for electric distribution and solar interconnection. PG&E's interconnection process for solar in California follows CPUC-regulated rules with defined technical review, agreement execution, and permission-to-operate stages. Key SF-specific considerations:
- PG&E's SLD conventions must be followed on the interconnection application
- NEM 3.0 (net billing) applies to systems interconnected under the current successor tariff, with export compensation different from prior NEM structures
- Larger commercial projects may require interconnection studies affecting timeline and cost
- Wildfire mitigation policies and Public Safety Power Shutoff (PSPS) considerations affect battery storage design and system operation for some SF and Bay Area projects
San Francisco historic preservation review
San Francisco has extensive historic preservation coverage, including numerous historic districts and individually designated landmark buildings across the city. Solar installations on regulated buildings require review by the SF Historic Preservation Commission or its designated staff before DBI building permits can be issued. Review evaluates:
- Visibility from the public way
- Impact on historic character and features
- Compatibility of installation approach with preservation guidelines
Plan sets for regulated buildings should be designed with the acceptable visibility envelope in mind. Early engagement with preservation staff on design approach helps prevent extended review cycles.
California fire code and SF-specific enforcement
California enforces stricter rooftop setback and pathway requirements than baseline IFC for solar installations. SF, with its dense urban environment and building conditions, applies these rules strictly. Solar plan sets must demonstrate:
- Pathway widths at ridges, hips, and valleys
- Setbacks from roof edges
- Continuous access pathways across arrays
- Ventilation clearance
Common San Francisco solar permit rejection reasons
- Better Roofs Ordinance compliance documentation missing on new construction
- Historic preservation review not initiated for regulated buildings
- Fire code setbacks and pathways not clearly dimensioned
- Structural analysis inadequate for older SF Victorian and Edwardian building conditions
- PG&E SLD format not matching utility conventions
- PE stamping missing where required
- Title 24 solar mandate compliance missing on new residential
- NEM 3.0 documentation inconsistent with system design
Where outsourced solar design fits into the SF market
SF's combination of California Title 24, local Better Roofs Ordinance, PG&E interconnection under NEM 3.0, extensive historic preservation coverage, and strict fire code enforcement makes it one of the most complex US solar markets. Solar EPCs and installers benefit from outsourced design partners who maintain fluency across all these regulatory layers.
RIH Engineering provides outsourced solar PV design for EPCs, installers, and developers operating in San Francisco and the greater Bay Area. Our plan sets are prepared against California codes, coordinated for PE-of-record stamping, and formatted for SF DBI and PG&E submissions with historic preservation and Better Roofs Ordinance considerations built in. If you want to talk through how outsourced design fits your SF pipeline, get in touch.
Frequently asked questions
Who issues solar permits in San Francisco?
The San Francisco Department of Building Inspection (DBI) issues building and electrical permits for solar installations in San Francisco. Solar projects typically require both a building permit and an electrical permit, with PE stamping for commercial and larger residential projects.
What is San Francisco's Better Roofs Ordinance?
The Better Roofs Ordinance requires most new construction in San Francisco to incorporate solar photovoltaic, solar thermal, living (green) roofs, or a combination across a specified percentage of roof area. Certain building types and configurations are exempt. Documentation demonstrating compliance is filed with the DBI building permit application.
Which utility serves San Francisco for solar interconnection?
PG&E (Pacific Gas and Electric) serves San Francisco for electric distribution and solar interconnection. PG&E's interconnection process follows CPUC-regulated rules with defined technical review and permission-to-operate stages. NEM 3.0 (net billing) applies to current successor tariff interconnections.
How does historic preservation affect solar in San Francisco?
San Francisco has extensive historic preservation coverage, including numerous historic districts and individually designated landmark buildings. Solar installations on regulated buildings require review by the SF Historic Preservation Commission or staff before DBI building permits can be issued. Review evaluates visibility and impact on historic character.
Do San Francisco solar projects require PE stamping?
Commercial and larger residential solar projects in San Francisco generally require California-licensed PE stamping. Smaller residential projects submitted through streamlined pathways may not require PE stamping. Always verify with SF DBI for the specific project size and building type.