San Mateo County property record for 319 30th Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,330 sqft · built 1947 |
| Lot Size | 0.127 acres (5,510 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $2,766,000 (Apr 2026) |
| Tax Bill | $10,526 (2025) |
| Deeds & Mortgages | Apr 2026 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 039-314-040 |
| Primary APN | 039-314-040 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Building Area | 2,330 sqft Living Area |
| Gross Area | 3,290 sqft |
| 1st Floor Area | 1,620 sqft |
| 2nd Floor Area | 710 sqft |
| Basement Area | 960 sqft |
| Family Room | Family Room |
| Year Built | Built 1947 |
|---|---|
| Effective Year Built | Effective 1947 |
| Lot Area | 5,510 sqft (0.127 acres) |
| Lot Dimensions | 110 ft deep x 50 ft wide |
| Garage Type | Basement |
| Garage Area | 960 sqft |
| Parking Spaces | 3 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 319 30TH AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-2716 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 4 BLOCK 11 SAN MATEO TERRACE MAP NO 5 RSM 22/35 CITY OF SAN MATEO |
| Legal Subdivision | SAN MATEO TERRACE MAP NO 5 |
| Legal Block | 11 |
| Legal Lot Number | 4 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2010 |
| Census Tract | 607300 |
319 30th Ave is owned and occupied by two individuals who bought it in April 2026.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 319 30TH AVE, SAN MATEO, CA 94403-2716 |
| 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 | Apr 3, 2026 · Amount on File |
| Deed Sale | Apr 3, 2026 · Amount on File |
| Deed Document Number | 202617327 |
| Prior Transfer Date | Jul 19, 2007 |
| Prior Transfer Doc | 0000117167 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Apr 3, 2026 |
| Property Address | 319 30TH AVE, SAN MATEO, CA 94403-2716 |
| Document Number | 0000017327 |
| Instrument Date | Mar 26, 2026 |
| Instrument | 202617327 |
| Transaction Type | Transfer |
| Record Updated | Jul 2, 2026 |
| Title Company | CHICAGO TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $307,302.60 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 319 30TH AVE, SAN MATEO, CA 94403-2716 |
| Document Number | 0000017328, |
|---|---|
| Date | Apr 3, 2026 |
| Instrument | 202617328 |
| Name | GUARANTEED RATE AFFINITY LLC |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | May 1, 2056 |
| Rate Type | Fixed Rate |
|---|---|
| Rate | 6.01% |
| Initial Type | Fixed Rate |
| Max Rate | -1% |
The 2025 property tax bill for 319 30th Ave was $10,526, down 2.6% 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 | $2,754,000 (+239.72%) Land $1,703,400 Building $1,050,600 | ||
| 2025 | $10,526.00 (-2.57%) Homeowner's exemption | $810,658 Land $405,329 Building $405,329 | |
| 2024 | $10,804.00 (+9.94%) | ||
| 2023 | $9,827.00 (+0.86%) Homeowner's exemption | $779,182 Land $389,591 Building $389,591 | $2,601,810 |
| 2022 | $9,743.00 |
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 319 30th Ave in Zone X, an area of minimal flood risk, though there have been 4 flood claims nearby since 1998.
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 | 4 (1998–2022) |
| Claims Outside the SFHA | 4 of 4 |
| Most Recent Claim | Dec 2022 · rainfall accumulation |
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 30th 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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