San Mateo County property record for 319 23rd Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1 ba · 1,450 sqft · built 1939 |
| Lot Size | 0.153 acres (6,650 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $2,035,000 (Jul 2019) |
| Tax Bill | $27,662 (2025) |
| Deeds & Mortgages | Jul 2019 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 039-142-060 |
| Primary APN | 039-142-060 |
|---|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,450 sqft Living Area |
| Gross Area | 2,050 sqft |
| 1st Floor Area | 1,450 sqft |
| Basement Area | 600 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1939 |
|---|---|
| Effective Year Built | Effective 1939 |
| Architectural Style | Ranch |
| Exterior Material | Wood |
| Construction Type | Wood |
| Foundation Type | Pier/Post & Beam |
| Roof Material | Other |
| Lot Area | 6,650 sqft (0.153 acres) |
| Lot Dimensions | 133 ft deep x 50 ft wide |
| Garage Type | Basement |
| Garage Area | 600 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 319 23RD AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-2239 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | WLY 1/2 OF LOT 7 BLOCK 6 SAN MATEO VILLA PARK RSM 12/50 51 CITY OF SAN MATEO |
| Legal Subdivision | SAN MATEO VILLA PARK |
| Legal Block | 6 |
| Legal Lot Number | 7 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 607400 |
319 23rd Ave is owned and occupied by two individuals who bought it in July 2019.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 319 23RD AVE, SAN MATEO, CA 94403-2239 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
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 | Jul 16, 2019 · Amount on File |
| Deed Sale | Jul 16, 2019 · Amount on File |
| Prior Sale | Sep 30, 1994 · Amount on File |
| Deed Document Number | 201955372 |
| Prior Transfer Date | Dec 3, 1999 |
| Prior Transfer Doc | 0000204423 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Jul 16, 2019 |
| Property Address | 319 23RD AVE, SAN MATEO, CA 94403-2239 |
| Document Number | 0000055372 |
| Map Reference | MB 12 PG 50&51 |
| Instrument Date | Jul 15, 2019 |
| Instrument | 2019-055372 |
| Transaction Type | Transfer |
| Record Updated | Aug 9, 2021 |
| Title Company | LAWYERS TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 319 23RD AVE, SAN MATEO, CA 94403-2239 |
| Document Number | 0000055373 |
|---|---|
| Date | Jul 16, 2019 |
| Instrument | 2019-055373 |
| Name | FIRST REPUBLIC BANK |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Aug 1, 2049 |
The 2025 property tax bill for 319 23rd Ave was $27,662.
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 | $2,270,076 (+2%) Land $1,422,285 Building $847,791 | ||
| 2025 | $27,662.00 | $2,225,566 Land $1,394,398 Building $831,168 | |
| 2023 | $26,516.00 (+2.88%) | $2,139,146 Land $1,340,252 Building $798,894 | $2,287,170 |
| 2022 | $25,773.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 319 23rd Ave in Zone X, an area of minimal flood risk.
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 |
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 319 23rd 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 799 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 | 1,500 / 50 |
May also be available: Etheric Networks, GeoLinks, T-Mobile, Verizon.
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