San Mateo County property record for 641 42nd Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,950 sqft · built 1960 |
| Lot Size | 0.225 acres (9,802 sqft) |
| Owner | Individual Name on File |
| Last Sale | $768,000 (Nov 2003) |
| Tax Bill | $14,648 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 042-171-480 |
| Primary APN | 042-171-480 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,950 sqft Living Area |
| Gross Area | 2,710 sqft |
| 1st Floor Area | 1,520 sqft |
| Basement Area | 760 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1960 |
|---|---|
| Effective Year Built | Effective 1960 |
| Lot Area | 9,802 sqft (0.225 acres) |
| Lot Dimensions | 150 ft deep x 63 ft wide |
| Garage Type | Basement |
| Garage Area | 760 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 641 42ND AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-5059 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 17 LAUREL HEIGHTS MAP NO 2 RSM 52/43 44 CITY OF SAN MATEO |
| Legal Subdivision | LAUREL HEIGHTS MAP NO 2 |
| Legal Lot Number | 17 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1003 |
| Census Tract | 607100 |
641 42nd Ave is owned and occupied by an individual who bought it in November 2003.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 641 42ND AVE, SAN MATEO, CA 94403-5059 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Married Woman, Separate 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 | Name on Deed |
|---|---|
| Last Sale | Nov 13, 2003 · Amount on File |
| Deed Sale | Nov 13, 2003 · Amount on File |
| Prior Sale | Nov 13, 2003 · Amount on File |
| Deed Document Number | 2003323185 |
| Prior Transfer Date | Sep 29, 1998 |
| Prior Transfer Doc | 0000193018 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 641 42nd Ave was $14,648, up 1.4% from the year before.
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 | $1,136,288 (+2.88%) Land $566,100 Building $570,188 | ||
| 2025 | $14,648.00 (+1.38%) | $1,104,452 Land $545,959 Building $558,493 | |
| 2024 | $14,448.00 (+2.96%) | ||
| 2023 | $14,033.00 (+0.73%) | $1,061,567 Land $524,759 Building $536,808 | $1,694,250 |
| 2022 | $13,931.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 641 42nd Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1997.
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 Policies | 1 in force |
| Nearby Flood Claims | 1 (1997) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jan 1997 · Severe Storms, Flooding, Mud And Landslides |
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.
Wildfire risk around 641 42nd Ave is low, with a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 95% of the US · lower than 97% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 572 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: T-Mobile.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures