San Mateo County property record for 421 Occidental Ave, San Mateo, CA 94402
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3 ba · 3,380 sqft · built 1914 |
| Lot Size | 0.259 acres (11,267 sqft) |
| Owner | Company Name on File |
| Last Sale | $3,682,000 (Nov 2021) |
| Tax Bill | $20,030 (2025) |
| Deeds & Mortgages | Nov 2021 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 031-061-050 |
| Primary APN | 031-061-050 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 3,380 sqft Living Area |
| 1st Floor Area | 1,670 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 1914 |
|---|---|
| Effective Year Built | Effective 1914 |
| Lot Area | 11,267 sqft (0.259 acres) |
| Lot Dimensions | 165 ft deep x 70 ft wide |
| Garage Area | 370 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 421 OCCIDENTAL AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94402-1131 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10010 |
| Legal Description | SLY 64 FT OF LOT 266 & NLY 10 FT OF LOT 267 ON OCCIDENTAL AVE SAN MATEO PARK SUB NO 3 RSM A/68 CITY OF SAN MATEO |
| Legal Subdivision | SAN MATEO PARK |
| Legal Lot Number | 266 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 605800 |
421 Occidental Ave is owned by a company that bought it in November 2021 and is owner-occupied.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 421 OCCIDENTAL AVE, SAN MATEO, CA 94402-1131 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Borrower in Default |
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 15, 2021 · Amount on File |
| Deed Sale | Nov 15, 2021 · Amount on File |
| Deed Document Number | 2021158641 |
| Prior Transfer Date | Dec 18, 2015 |
| Prior Transfer Doc | 0000133873 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Nov 15, 2021 |
| Property Address | 421 OCCIDENTAL AVE, SAN MATEO, CA 94402-1131 |
| Document Number | 0000158641 |
| Map Reference | MB A PG 68 |
| Instrument Date | Nov 9, 2021 |
| Instrument | 2021-158641 |
| Transaction Type | Transfer |
| Record Updated | Dec 3, 2021 |
| Title Company | LAWYERS TITLE COMPANY/CA, LAWYERS TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $22,460.20 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 421 OCCIDENTAL AVE, SAN MATEO, CA 94402-1131 |
| Document Number | 0000158642 |
|---|---|
| Date | Nov 15, 2021 |
| Instrument | 2021-158642 |
| Name | US BANK NA |
|---|---|
| Type | Bank |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Dec 1, 2051 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 2.37% |
| Type Change Date | Dec 1, 2028 |
| Change Frequency | Annually |
| Min Rate At Change | 2.75% |
| Max Rate At Change | 7.37% |
| Index | 1-Year CMT |
| Max Rate | 7.37% |
The 2025 property tax bill for 421 Occidental Ave was $20,030 with a homeowner's exemption.
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 | $1,661,258 (+2%) Land $814,344 Building $846,914 | ||
| 2025 | $20,030.00 Homeowner's exemption | $1,628,685 Land $798,377 Building $830,308 | |
| 2023 | $19,263.00 (-0.7%) Homeowner's exemption | $1,565,443 Land $767,376 Building $798,067 | $2,920,410 |
| 2022 | $19,399.00 |
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 421 Occidental Ave in Zone X, an area of minimal flood risk, though there have been 3 flood claims nearby since 1999.
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 | 3 (1999–2013) |
| Claims Outside the SFHA | 3 of 3 |
| Most Recent Claim | Jan 2013 · other causes |
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 421 Occidental Ave is low, with less than 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 99.1% of the US · lower than 99.2% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | Direct burnable vegetation |
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 333 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
May also be available: Etheric Networks, Sonic Telecom, T-Mobile, Verizon.
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