San Francisco County NHD Reports & Property Tax Guide
Natural hazard disclosures and property tax information for San Francisco County, California.
San Francisco County at a glance
- Effective tax rate
- 1.18%
- Median home price
- $1,350,000.00
- Est. annual property tax
- $15,930.00
- Hazard zone categories
- 4
Estimates only. Rates include the Proposition 13 1% base rate plus typical voter-approved bonds; median price is an approximate 2025 figure. Special assessments such as Mello-Roos are not included.
The 1989 Loma Prieta earthquake caused severe liquefaction damage in the Marina District.
Natural Hazards in San Francisco County
These are the hazard categories that most often drive disclosure answers in San Francisco County. Each one is a separate determination on the Natural Hazard Disclosure Statement.
The San Andreas Fault runs just offshore of the city's west side and the Hayward Fault lies across the bay; Alquist-Priolo zones within the city itself are limited.
Extensive mapped liquefaction zones cover the Marina, SoMa, Mission Bay, Financial District, and Islais Creek — all built on bay fill.
FEMA flood mapping and city sea level rise planning both flag low-lying eastern waterfront and former creek channels.
Wildland fire hazard exposure is minimal in San Francisco; the fire concern is urban conflagration following an earthquake rather than mapped severity zones.
Former shipyard, gasworks, and industrial parcels — including Hunters Point and Mission Bay — carry documented contamination and Cortese List records.
Property Taxes in San Francisco County
Every property in San Francisco County starts from the Proposition 13 base rate of 1% of assessed value, using the purchase price as the base year value and rising by no more than 2% per year. Voter-approved bonds for schools, water, and infrastructure push the typical effective rate in San Francisco County to roughly 1.18%, so a bill is usually a little above 1% of what the buyer paid. As a combined city and county, San Francisco applies a single consolidated rate, with school, transit, and seawall bond measures making up the portion above the 1% base. Special assessments are layered on top of the ad valorem rate: Mello-Roos community facilities district taxes in newer subdivisions, 1915 Act bond assessments, and small district charges for lighting, vector control, or sewer service. Those line items are fixed dollar amounts rather than percentages, so they matter most on lower-priced homes. Supplemental tax bills arrive after a sale or new construction to reconcile the new assessed value with the prior owner's.
Use our California property tax calculator to model a specific San Francisco County purchase price, including Mello-Roos and 1915 Act assessments.
Getting an NHD Report in San Francisco County
Verity NHD covers every parcel in San Francisco County. Enter the address or APN and the report is generated automatically from current state and federal hazard layers — typically in minutes, not days. Each report includes the statutory hazard determinations, environmental database screening, property tax and special assessment information, hazard maps, a plain-English Verity AI℠ compliance summary, bilingual English and Spanish delivery, and built-in ValidaSign℠ eSignature with a timestamped audit trail.
See the full NHD report overview for what is included in each tier, review the California disclosure requirements, or compare Verity NHD to other providers.
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Frequently asked questions
How much are property taxes in San Francisco County?
San Francisco property taxes average about 1.18% of assessed value including bonds — roughly $15,930 per year on the city's approximately $1,350,000 median home price.
What natural hazards affect San Francisco County?
Liquefaction is the headline item, with extensive zones in the Marina, SoMa, and Mission Bay bay fill areas. The San Andreas and Hayward faults dominate regional shaking risk, low-lying waterfront areas face flood and sea level rise exposure, and former shipyard and industrial parcels carry contamination records.
Do I need an NHD report in San Francisco County?
Yes. Civil Code §1103 applies to San Francisco sellers, and the seismic hazard zone determination is the one buyers and lenders question most.
How much does an NHD report cost in San Francisco County?
Standard NHD reports start at $74.95 statewide. Properties on former industrial or fill land often use the premium environmental tier.