San Mateo County property record for 526 31st Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,150 sqft · built 1941 |
| Lot Size | 0.128 acres (5,563 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $260,000 (Oct 1995) |
| Tax Bill | $6,766 (2025) |
| Deeds & Mortgages | May 2026 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 039-303-270 |
| Primary APN | 039-303-270 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Building Area | 1,150 sqft Living Area |
| 1st Floor Area | 990 sqft |
| Family Room | Family Room |
| Year Built | Built 1941 |
|---|---|
| Effective Year Built | Effective 1941 |
| Lot Area | 5,563 sqft (0.128 acres) |
| Lot Dimensions | 111 ft deep x 50 ft wide |
| Garage Area | 260 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 526 31ST AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-3813 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 22 BLOCK 18 SAN MATEO TERRACE MAP NO 5 RSM 22/35 CITY OFSAN MATEO |
| Legal Subdivision | SAN MATEO TERRACE MAP NO 5 |
| Legal Block | 18 |
| Legal Lot Number | 22 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 3 |
| Census Block | 3001 |
| Census Tract | 607300 |
526 31st Ave is held in a trust since May 2026.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 7 CARLSBAD CT, SOUTH SAN FRANCISCO, CA 94080-4204 |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
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 | Oct 12, 1995 · Amount on File |
| Deed Sale | Oct 12, 1995 · Amount on File |
| Deed Document Number | 1995108421 |
| Last Transfer Date | May 14, 2026 |
| Transfer Doc | 0000027566 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | May 14, 2026 |
| Property Address | 526 31ST AVE, SAN MATEO, CA 94403-3813 |
| Document Number | 0000027566 |
| Instrument Date | May 14, 2026 |
| Instrument | 202627566 |
| Transaction Type | Transfer |
| Record Updated | Aug 28, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 7 CARLSBAD CT, SOUTH SAN FRANCISCO, CA 94080-4204 |
The 2025 property tax bill for 526 31st Ave was $6,766.
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 | $440,538 (+2%) Land $220,269 Building $220,269 | ||
| 2025 | $6,766.00 | $431,900 Land $215,950 Building $215,950 | |
| 2023 | $7,201.00 (+4%) | $415,130 Land $207,565 Building $207,565 | $1,160,730 |
| 2022 | $6,924.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 526 31st Ave in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 2009.
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 | 2 in force |
| Nearby Flood Claims | 2 (2009–2017) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Jan 2017 · Severe Winter Storms, Flooding, And Mudslides |
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 526 31st 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 716 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 |
May also be available: Etheric Networks, GeoLinks, T-Mobile.
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