Historic Renovation in San Francisco: Article 10, Article 11, and Mills Act
San Francisco has some of the country's strictest historic preservation rules and highest rate of pre-1946 housing stock — roughly 50% of the city's homes predate World War II. A Victorian in Alamo Square, an Edwardian in the Marina, a Mediterranean Revival in Jordan Park, or a commercial building in Jackson Square all likely trigger Historic Preservation Commission (HPC) review. Separately, CEQA historic-resource evaluations often apply even to unlisted pre-1946 buildings. This guide covers the 2026 workflow end-to-end.
Regulatory framework
SF Planning Code Article 10 (§§1000-1013) establishes designated landmarks and citywide historic districts. Article 11 (§§1100-1111) covers downtown C-3 conservation districts with building-by-building ratings I-V. The Historic Preservation Commission, a seven-member appointed body, reviews Certificates of Appropriateness under Article 10 and Permit to Alter applications under Article 11.
CEQA (CA Public Resources Code §21084.1 + CEQA Guidelines §15064.5) treats buildings meeting California Register eligibility criteria as historical resources. SF Planning's Historic Resource Evaluation (HRE) determines Category A/B/C/D for any alteration or demolition project on a potentially historic building. A/B ratings trigger full CEQA review.
Department of Building Inspection (sfdbi.org) runs building-code review. DBI will not issue alteration permits for designated or CEQA-rated A/B properties without Planning / HPC sign-off.
Cost and timelines (2026)
SF Planning fees in 2026: HRE (Historic Resource Evaluation) $5,200; Certificate of Appropriateness $3,700; Permit to Alter (Article 11) $2,950; Mills Act contract application $3,200. Preservation consultant fees for HRE or HRER: $8,000-$30,000.
HRE/HRER staff determination: 45-90 days. If the building is rated A or B, add CEQA analysis: 60-180 days for Categorical Exemption or Mitigated Negative Declaration. Certificate of Appropriateness hearings at HPC: monthly schedule with 30-day notice; realistic 45-75 day window.
DBI permits run 4-12 weeks for residential alterations in 2026 after Planning sign-off. Combined Planning + HPC + DBI timeline for a Victorian facade restoration with interior expansion: 180-300 days start to permit-in-hand. Budget accordingly.
Four SF historic-renovation pitfalls
1. Victorian / Edwardian front-facade alterations. SF Planning Code §317 (Loss of Dwelling Units ordinance) plus HPC review make front-facade changes to Victorians almost always require HPC sign-off. Removing bay-window trim, infilling ornamental brackets, or replacing wood-sash with vinyl triggers violation.
2. Vertical or horizontal additions without reviewing CEQA impact. Second-story or rear additions to pre-1946 buildings almost always require HRE. Skipping the HRE by filing only under DBI triggers a Planning hold and project restart. Plan for HRE at 45-90 days up front.
3. Soft-story seismic retrofit aesthetics. SF's mandatory soft-story retrofit program (Building Code §1604A.1.1) affects many pre-1978 multifamily buildings. Retrofit must not impair historic character on designated or A/B-rated buildings — typical solution is interior moment-frame or fiber-reinforced wrapping, not exterior bracing.
4. Fog-bay windows replaced with flat windows. SF's distinctive bay windows (slanted, squared, and round varieties) are character-defining on thousands of buildings. Replacing a bay with a flat window or filling a bay projection is almost always denied on designated or A/B buildings.
Five-item SF historic-renovation checklist
1. Pull Planning Department Property Information Report (PIM) to identify Article 10 designation, Article 11 category, CEQA rating if already established, and previous violations.
2. Commission HRE up front if building is pre-1946 and status unclear. Don't wait for Planning to require it.
3. Prepare scope to Secretary of the Interior's Standards. Budget for preservation consultant, architect familiar with SF HPC practice, and contingency for HPC-conditioned changes.
4. File Certificate of Appropriateness (Article 10) or Permit to Alter (Article 11) with Planning. Apply for Mills Act contract if eligible.
5. After Planning approval, file DBI building permit. Maintain all approvals on-site during construction; SF does perform post-permit compliance inspections.
FAQ
Both are chapters of the San Francisco Planning Code. Article 10 establishes citywide designated landmarks and historic districts (Alamo Square, Liberty-Hill, Webster Street) with review by the Historic Preservation Commission (HPC). Article 11 covers downtown C-3 conservation districts (Kearny-Market-Mason-Sutter, Chinatown, Jackson Square, Northeast Waterfront) and applies Categories I-V to each building based on historical significance. Both trigger HPC review for alterations.
SF uses Planning Code §317 and CEQA to rate every building for historical significance. Category A = known historical resource (Article 10 landmark, Article 11 Category I-IV, or National Register-listed). Category B = likely historical resource (pre-1946 with intact character). Category C = likely not historical. Category D = not historical. Category A and B trigger full historic resource review (HRE or HRER) before any alteration or demolition. This rating process alone commonly runs 60-120 days.
Yes. SF Admin Code §18-5 implements the California Mills Act. SF accepts Mills Act contracts on Article 10 landmarks and Category A buildings in Article 11 districts. Contract is 10 years rolling with restoration/maintenance obligations. Typical SF Mills Act tax reduction is 40-60% — substantial given SF's high assessed values. Application is annual through SF Planning's Preservation staff; timing aligns with the County Assessor's cycle.
Ask Baily about your SF historic renovation
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