San Mateo County property record for 620 1st Ave, San Mateo, CA 94401
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4 ba · 2,190 sqft · built 1932 |
| Lot Size | 0.148 acres (6,450 sqft) |
| Owner | 2 Trust Names on File |
| Last Sale | $43,000 (Jun 2017) |
| Tax Bill | $19,101 (2025) |
| Deeds & Mortgages | Sep 2026 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 034-163-040 |
| Primary APN | 034-163-040 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 13 Rooms |
| Stories | 1 Story |
| Building Area | 2,190 sqft Living Area |
| 1st Floor Area | 2,190 sqft |
| Basement Area | 1,160 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1932 |
|---|---|
| Effective Year Built | Effective 1989 |
| Architectural Style | Multi-Family |
| Lot Area | 6,450 sqft (0.148 acres) |
| Lot Dimensions | 150 ft deep x 46 ft wide |
| Garage Area | 210 sqft |
| Parking Spaces | 950 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 620 1ST AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94401-3224 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | RM0003 |
| Legal Description | N 45 FT OF ARB LOTS 4 5 6 BLOCK 28 TOWN OF SAN MATEO VOL 2 MISC PG 95 |
| Legal Subdivision | TOWN OF SAN MATEO |
| Legal Block | 28 |
| Legal Lot Number | 4 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1014 |
| Census Tract | 606202 |
620 1st Ave is held in a trust since June 2017.
Source: San Mateo County records, as of July 15, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 3916 GILLIS DR, SAN MATEO, CA 94403-3635 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 15, 2017 · Amount on File |
| Deed Sale | Jun 15, 2017 · Amount on File |
| Prior Sale | Feb 27, 2014 · Amount on File |
| Deed Document Number | 201751579 |
| Prior Transfer Date | Feb 11, 2014 |
| Prior Transfer Doc | 0000016478 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Sep 24, 2026 |
| Property Address | 620 1ST AVE, SAN MATEO, CA 94401-3224 |
| Document Number | 0000054105 |
| Instrument Date | Sep 17, 2026 |
| Instrument | 202654105 |
| Transaction Type | Transfer |
| Record Updated | Oct 23, 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 | 3916 GILLIS DR, SAN MATEO, CA 94403-3635 |
The 2025 property tax bill for 620 1st Ave was $19,101.
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 |
|---|---|---|
| 2026 | $1,407,427 (+2%) Land $709,718 Building $697,709 | |
| 2025 | $19,101.00 | $1,379,832 Land $695,803 Building $684,029 |
| 2023 | $17,655.00 (-0.59%) | $1,326,258 Land $668,786 Building $657,472 |
| 2022 | $17,759.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 620 1st Ave in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 5 in force |
| Nearby Flood Claims | 1 (2022) |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, 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 620 1st 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 791 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 · Fiber in parts of the area | 1,500 / 50 |
| Sonic Telecom Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| Unwired Fixed Wireless | 300 / 25 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile.
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