San Mateo County property record for 138 43rd Ave, San Mateo, CA 94403
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 2,020 sqft · built 1950 |
| Lot Size | 0.117 acres (5,082 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $9,586 (2025) |
| Deeds & Mortgages | Apr 2021 Mortgage Mar 2021 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 042-261-230 |
| Primary APN | 042-261-230 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 2,020 sqft Living Area |
| 1st Floor Area | 990 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Architectural Style | Ranch |
| Exterior Material | Wood |
| Construction Type | Wood |
| Roof Material | Other |
| Lot Area | 5,082 sqft (0.117 acres) |
| Lot Dimensions | 80 ft deep x 64 ft wide |
| Garage Area | 400 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 138 43RD AVE |
|---|---|
| City | SAN MATEO |
| State | CA |
| Zip | 94403-5114 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 18 BLOCK 22 SAN MATEO KNOLLS MAP NO 2 RSM 24/61 62 CITY OF SAN MATEO |
| Legal Subdivision | SAN MATEO KNOLLS MAP NO 2 |
| Legal Block | 22 |
| Legal Lot Number | 18 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2026 |
| Census Tract | 607200 |
138 43rd Ave is owned and occupied by two individuals who acquired it in April 1995.
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 Individual Names on File |
|---|---|
| Mailing Address | 138 43RD AVE, SAN MATEO, CA 94403-5114 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Apr 19, 2021 | Deed of Trust, Mortgage · Conventional Mortgage WELLS FARGO BANK NA |
| Mar 3, 2021 | Intrafamily Transfer, Transfer |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Apr 25, 1995 |
| Transfer Doc | 0000051922 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 138 43RD AVE, SAN MATEO, CA 94403-5114 |
| Transaction Type | Mortgage |
| Record Updated | Aug 5, 2022 |
| Title Company | FIRST AMERICAN TITLE |
| Name | Verified Name |
|---|---|
| Address | 138 43RD AVE, SAN MATEO, CA 94403-5114 |
| Document Number | 0000061739 |
|---|---|
| Date | Apr 19, 2021 |
| Instrument | 2021-061739 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Address | SIOUX FALLS, SD 57104 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | May 1, 2051 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Mar 3, 2021 |
| Property Address | 138 43RD AVE, SAN MATEO, CA 94403-5114 |
| Document Number | 0000035185 |
| Map Reference | MB 24 PG 60-62 |
| Instrument Date | Jan 28, 2021 |
| Instrument | 2021-035185 |
| Transaction Type | Transfer |
| Record Updated | Aug 5, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Joint Tenants |
| Address | 138 43RD AVE, SAN MATEO, CA 94403-5114 |
The 2025 property tax bill for 138 43rd Ave was $9,586 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 | $693,163 (+2%) Land $257,014 Building $436,149 | ||
| 2025 | $9,586.00 Homeowner's exemption | $679,573 Land $251,975 Building $427,598 | |
| 2023 | $9,082.00 (+1.69%) Homeowner's exemption | $653,188 Land $242,192 Building $410,996 | $2,318,040 |
| 2022 | $8,931.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 138 43rd Ave in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1986.
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 Claims | 1 (1986) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 1986 · Severe Storms & Flooding |
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 138 43rd 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 785 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 | 1,500 / 50 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
May also be available: GeoLinks, T-Mobile.
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