San Mateo County property record for 270 Walnut St, San Bruno, CA 94066
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,010 sqft · built 1930 |
| Lot Size | 0.057 acres (2,500 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $935,000 (Sep 2024) |
| Tax Bill | $10,733 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 020-188-290 |
| Primary APN | 020-188-290 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 4 Rooms |
| Stories | 1 Story |
| Building Area | 1,010 sqft Living Area |
| Gross Area | 2,030 sqft |
| 1st Floor Area | 1,010 sqft |
| Basement Area | 1,020 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1930 |
|---|---|
| Effective Year Built | Effective 1930 |
| Architectural Style | Spanish |
| Exterior Material | Stucco |
| Roof Material | Tile |
| Lot Area | 2,500 sqft (0.057 acres) |
| Lot Dimensions | 100 ft deep x 25 ft wide |
| Garage Type | Basement |
| Garage Area | 1,020 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 270 WALNUT ST |
|---|---|
| City | SAN BRUNO |
| State | CA |
| Zip | 94066-3236 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R30000 |
| Legal Description | LOT 49 BLOCK 12 BELLE AIR PARK RSM 5/10 |
| Legal Subdivision | BELLE AIR PARK |
| Legal Block | 12 |
| Legal Lot Number | 49 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SOUTH SAN FRANCISCO |
| Census Block Group | 1 |
| Census Block | 1010 |
| Census Tract | 604200 |
270 Walnut St is owned and occupied by two individuals who bought it in September 2024.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 270 WALNUT ST, SAN BRUNO, CA 94066-3236 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 20, 2024 · Amount on File |
| Deed Sale | Sep 20, 2024 · Amount on File |
| Deed Document Number | 202449904 |
| Prior Transfer Date | Nov 1, 2008 |
| Prior Transfer Doc | 0000066315 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 270 Walnut St was $10,733 with a homeowner's exemption.
Source: San Mateo County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Mateo County |
| Municipality | San Bruno City |
| Elementary School District | San Bruno Park Elementary School District (KG - 08) |
| Secondary School District | San Mateo Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $953,700 (+2%) Land $618,885 Building $334,815 | ||
| 2025 | $10,733.00 Homeowner's exemption | $935,000 Land $606,750 Building $328,250 | |
| 2023 | $3,715.00 (+1.17%) | $331,848 Land $165,924 Building $165,924 | $883,170 |
| 2022 | $3,672.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
FEMA maps place 270 Walnut St in Zone X, an area of minimal flood risk, though there have been 5 flood claims nearby since 2021.
Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on File median of 29 policies |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 29 in force |
| Nearby Flood Claims | 5 (2021–2022) |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
| Claims by Event |
|
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.
The area around 270 Walnut St has no burnable land within ember reach, so its wildfire risk is not rated.
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 | CITY OF SAN BRUNO serves 42,631 people · EPA ID CA4110023 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Jul 2024 |
| Lead | Under 1 ppb (2023–2025) 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 827 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Astound Broadband, GeoLinks, Sonic Telecom.
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