San Mateo County property record for 122 43rd Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,470 sqft · built 1950 |
| Lot Size | 0.119 acres (5,200 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $810,000 (Nov 2004) |
| Tax Bill | $15,363 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 042-261-190 |
| Primary APN | 042-261-190 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,470 sqft Living Area |
| Gross Area | 1,770 sqft |
| 1st Floor Area | 1,160 sqft |
| Basement Area | 300 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Lot Area | 5,200 sqft (0.119 acres) |
| Lot Dimensions | 80 ft deep x 65 ft wide |
| Garage Area | 470 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 122 43RD AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-5114 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 22 BLOCK 22 SAN MATEO KNOLLS MAP NO 2 RSM 24/61 62 CITY OF SAN MATEO |
| Legal Subdivision | SAN MATEO KNOLLS MAP NO 2 |
| Legal Block | 22 |
| Legal Lot Number | 22 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2026 |
| Census Tract | 607200 |
122 43rd Ave is owned and occupied by two individuals who bought it in November 2004.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 2520 CARMELITA AVE, BELMONT, CA 94002-1530 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 | Nov 23, 2004 · Amount on File |
| Deed Sale | Nov 23, 2004 · Amount on File |
| Deed Document Number | 2004230788 |
| Prior Transfer Date | Jan 22, 2003 |
| Prior Transfer Doc | 0000060086 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 122 43rd Ave was $15,363 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 Mateo City |
| Elementary School District | San Mateo-Foster City 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 | $1,151,638 (+2%) Land $575,819 Building $575,819 | ||
| 2025 | $15,363.00 Homeowner's exemption | $1,129,058 Land $564,529 Building $564,529 | |
| 2023 | $14,192.00 (+1.15%) Homeowner's exemption | $1,085,216 Land $542,608 Building $542,608 | $1,750,140 |
| 2022 | $14,030.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 122 43rd Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1986.
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 |
| Nearby Flood Claims | 1 (1986) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1986 · Severe Storms & Flooding |
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 122 43rd Ave 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 | CALIFORNIA WATER SERVICE - SAN MATEO private · serves 103,536 people · EPA ID CA4110008 |
|---|---|
| Water Source | Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM |
| Last State Inspection | Mar 2025 |
| Lead | 4 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 734 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 |
| Astound Broadband Cable | 1,500 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| Starlink Satellite | 280 / 30 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Sonic Telecom.
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