San Francisco City property record for 4331 20th St, San Francisco, CA 94114
| Property Type | Apartments (5+ Units) |
|---|---|
| Details | 2 ba · 2,688 sqft · built 1885 |
| Lot Size | 0.001 acres (24 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $8,113 (2025) |
| APN | 2751-022 |
| Primary APN | 2751-022 |
|---|
| Full Baths | 2 Baths |
|---|---|
| Total Rooms | 10 Rooms |
| Units | 4 Units |
| Stories | 2 Stories |
| Building Area | 2,688 sqft Living Area |
| 1st Floor Area | 2,688 sqft |
| Year Built | Built 1885 |
|---|---|
| Effective Year Built | Effective 1885 |
| Architectural Style | Duplex Single |
| Construction Type | Frame |
| Lot Area | 24 sqft (0.001 acres) |
| Street Address | 4331 20TH ST |
|---|---|
| City | SAN FRANCISCO |
| State | CA |
| Zip | 94114-2816 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Apartments (5+ Units) |
| Local Zoning Code | RH3 |
| Legal Description | MAP B3 10 |
| Legal Subdivision | HORNERS ADD BL 191 |
| Legal Block | 2751 |
| Legal Lot Number | 22 |
| Jurisdiction | SAN FRANCISCO CA |
| Township / Civil Division | WESTERN ADDITION-BUENA VISTA-EUREKA VALLEY |
| Census Block Group | 3 |
| Census Block | 3004 |
| Census Tract | 20500 |
Source: San Francisco City records, as of September 8, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 4331 20TH ST, 4333, SAN FRANCISCO, CA 94114-2816 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Revocable Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Oct 2, 2013 |
| Transfer Doc | L024/0262 |
| Record Updated | Oct 29, 2026 |
Source: San Francisco City assessment roll, as of September 8, 2026
| Type | Name |
|---|---|
| State | California |
| County / Municipality | San Francisco City |
| Unified School District | San Francisco Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $637,280 (+2.01%) Land $298,725 Building $338,555 | |
| 2025 | $8,113.00 (+2.93%) Homeowner's exemption | $624,739 (+4.04%) Land $292,846 Building $331,893 |
| 2024 | $7,882.00 (+1.64%) | |
| 2023 | $7,755.00 (+2.11%) Homeowner's exemption | $600,481 Land $281,475 Building $319,006 |
| 2022 | $7,595.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
Source: FEMA National Flood Hazard Layer · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Not on file |
|---|---|
| Nearby Flood Policies | 1 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | SFPUC CITY DISTRIBUTION DIVISION serves 848,019 people · EPA ID CA3810011 |
|---|---|
| Water Source | Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM |
| Last State Inspection | Mar 2023 |
| Lead | Under 1 ppb (2022–2024) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 1,850 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
| Sonic Telecom Fiber | 1,000 / 1,000 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: AT&T, GeoLinks, Google Fiber, T-Mobile, Verizon.
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