San Mateo County property record for 121 28th Ave, San Mateo, CA 94403 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 1,240 sqft · built 1948 |
| Lot Size | 0.179 acres (7,794 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $760,000 (May 2012) |
| Tax Bill | $13,069 (2025) |
| Deeds & Mortgages | Sep 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 039-385-170 |
| Primary APN | 039-385-170 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,240 sqft Living Area |
| 1st Floor Area | 1,240 sqft |
| Family Room | Family Room |
| Year Built | Built 1948 |
|---|---|
| Effective Year Built | Effective 1948 |
| Lot Area | 7,794 sqft (0.179 acres) |
| Lot Dimensions | 123 ft deep x 48 ft wide |
| View / Lot | Corner |
| Garage Area | 360 sqft |
| Parking Spaces | 1 Parking Space |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 121 28TH AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-2428 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 1 BLOCK 2 MAP OF KNAPP RESUB RSM 22/29 30 CITY OF SAN MATEO |
| Legal Subdivision | MAP OF KNAPP RESUB |
| Legal Block | 2 |
| Legal Lot Number | 1 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2000 |
| Census Tract | 607300 |
Source: San Mateo County records · APN 039-385-170
Assessment roll updated July 15, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 121 28TH AVE, SAN MATEO, CA 94403-2428 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | May 08, 2012 · Amount on Record |
| Deed Sale | May 08, 2012 · Amount on Record |
| Deed Document Number | 201264232 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 121 28TH AVE, SAN MATEO, CA 94403-2428 |
| Document Number | 0000093555 |
| Instrument Date | Sep 09, 2020 |
| Transaction Type | Mortgage |
| Record Updated | Oct 21, 2020 |
| Title Company | NOT AVAILABLE |
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants with Right of Survivorship |
| Address | 121 28TH AVE SAN MATEO CA 944032428, SAN MATEO, CA 94403-2428 |
| Document Number | 0000093555 |
|---|---|
| Date | Sep 10, 2020 |
| Instrument | 93555 |
| Name | BETTER MTG CORP ISAOA |
|---|---|
| Address | NEW YORK, NY 10271 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Sep 09, 2050 |
Source: San Mateo County records · Assessment roll updated July 15, 2026 · Last verified July 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) |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $973,680 (+2%) Land $486,840 Building $486,840 | ||
| 2025 | $13,069.00 (+6.76%) Homeowner's exemption | $954,590 (+4.04%) Land $477,295 Building $477,295 | |
| 2023 | $12,241.00 (+0.43%) Homeowner's exemption | $917,524 Land $458,762 Building $458,762 | $1,173,150 |
| 2022 | $12,189.00 |
Source: FEMA National Flood Hazard Layer, San Mateo County (06081C), updated September 10, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060816073002, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| 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 |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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.
Source: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 716 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Sonic Telecom | Fiber | 10,000 / 10,000 |
| AT&T | Fiber | 5,000 / 5,000 |
| Xfinity | Cable | 2,000 / 250 |
| Radiate Holdings | Cable | 1,500 / 50 |
May also be available at this address: T-Mobile USA, AT&T, Etheric Communications, LLC., Radiate Holdings, California Internet. Availability varies by address; speeds are provider-advertised maximums, not measured.
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