San Mateo County property record for 21 10th Ave, San Mateo, CA 94401
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3.5 ba · 3,520 sqft · built 1907 |
| Lot Size | 0.255 acres (11,110 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,400,000 (Feb 2014) |
| Tax Bill | $24,080 (2025) |
| Deeds & Mortgages | Nov 2025 Mortgage Sep 2019 Mortgage + 1 more |
| Flood Zone | Zone X (minimal risk) |
| APN | 034-277-070 |
| Primary APN | 034-277-070 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 12 Rooms |
| Stories | 2 Stories |
| Building Area | 3,520 sqft Living Area |
| 1st Floor Area | 1,450 sqft |
| 2nd Floor Area | 1,050 sqft |
| Basement Area | 970 sqft |
| Finished Basement | 970 sqft |
| Family Room | Family Room |
| Year Built | Built 1907 |
|---|---|
| Effective Year Built | Effective 1907 |
| Lot Area | 11,110 sqft (0.255 acres) |
| Lot Dimensions | 185 ft deep x 60 ft wide |
| Garage Area | 360 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 21 10TH AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94401-4304 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20000 |
| Legal Description | LOT 5 BLOCK B HAYWARD PARK SUB NO 1 RSM 4/22 |
| Legal Subdivision | HAYWARD PARK |
| Legal Block | B |
| Legal Lot Number | 5 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 3 |
| Census Block | 3006 |
| Census Tract | 606400 |
21 10th Ave is owned and occupied by two individuals who acquired it in June 2015.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 21 10TH AVE, SAN MATEO, CA 94401-4304 |
| 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.
| Date | Document |
|---|---|
| Nov 4, 2025 | Deed of Trust, Mortgage · SBA Mortgage FREMONT BANK |
| Sep 26, 2019 | Deed of Trust, Mortgage BANK OF AMERICA |
| Jul 2, 2018 | Deed of Trust, Mortgage · Line of Credit BANK OF AMERICA |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Feb 12, 2014 · Amount on File |
| Deed Sale | Feb 12, 2014 · Amount on File |
| Deed Document Number | 201412049 |
| Last Transfer Date | Jun 12, 2015 |
| Transfer Doc | 0000064166 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 21 10TH AVE, SAN MATEO, CA 94401-4304 |
| Transaction Type | Mortgage |
| Record Updated | Dec 8, 2025 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TTL CO OAKLAND |
| Name | Verified Name |
|---|---|
| Address | 21 10TH AVE, SAN MATEO, CA 94401-4304 |
| Document Number | 0000058819 |
|---|---|
| Date | Nov 4, 2025 |
| Instrument | 2025-058819 |
| Name | FREMONT BANK |
|---|---|
| Type | Bank |
| Address | LIVERMORE, CA 94551 |
| Type | SBA Mortgage |
|---|---|
| Amount | Amount on Record |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 21 10TH AVE, SAN MATEO, CA 94401-4304 |
| Document Number | 0000083377 |
| Instrument Date | Sep 26, 2019 |
| Transaction Type | Mortgage |
| Record Updated | Oct 28, 2019 |
| Title Company | NOT AVAILABLE |
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 21 10TH AVE SAN MATEO CA 944014304, SAN MATEO, CA 94401-4304 |
| Document Number | 0000083377 |
|---|---|
| Date | Oct 8, 2019 |
| Instrument | 83377 |
| Name | BANK OF AMERICA |
|---|---|
| Type | Bank |
| Address | CHARLOTTE, NC 28255 |
| Amount | Amount on Record |
|---|---|
| Term | 360 Months |
| Due | Oct 7, 2049 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 21 10TH AVE, SAN MATEO, CA 94401-4304 |
| Document Number | 0000055179 |
| Instrument Date | Jul 2, 2018 |
| Transaction Type | Mortgage |
| Record Updated | Aug 1, 2018 |
| Title Company | WFG LENDER SERVICES |
| Name | Verified Name |
|---|---|
| Address | 21 10TH AVE SAN MATEO CA 944014304, SAN MATEO, CA 94401-4304 |
| Document Number | 0000055179 |
|---|---|
| Date | Jul 16, 2018 |
| Instrument | 55179 |
| Name | BANK OF AMERICA |
|---|---|
| Type | Bank |
| Address | TAMPA, FL 33634 |
| Type | Line of Credit |
|---|---|
| Amount | Amount on Record |
| Rate Type | Adjustable Rate |
|---|
The 2025 property tax bill for 21 10th Ave was $24,080.
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 | $1,959,499 (+2%) Land $875,262 Building $1,084,237 | ||
| 2025 | $24,080.00 | $1,921,078 Land $858,100 Building $1,062,978 | |
| 2023 | $24,151.00 (+4.65%) | $1,846,485 Land $824,780 Building $1,021,705 | $2,120,490 |
| 2022 | $23,077.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 21 10th 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 21 10th 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 906 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 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Unwired, Verizon.
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