San Mateo County property record for 214 Polhemus Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 8 bd · 7 ba · 6,800 sqft · built 1940 |
| Lot Size | 1.93 acres (84,449 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $24,474 (2025) |
| Deeds & Mortgages | Sep 2021 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 070-022-420 |
| Primary APN | 070-022-420 |
|---|
| Bedrooms | 8 Beds |
|---|---|
| Full Baths | 7 Baths |
| Total Rooms | 16 Rooms |
| Stories | 2 Stories |
| Building Area | 6,800 sqft Living Area |
| Gross Area | 7,490 sqft |
| 1st Floor Area | 3,770 sqft |
| 2nd Floor Area | 2,720 sqft |
| Basement Area | 310 sqft |
| Finished Basement | 310 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1940 |
| Lot Area | 84,449 sqft |
| Lot Dimensions | 300 ft deep x 281 ft wide |
| Garage Type | Attached |
| Garage Area | 690 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 214 POLHEMUS AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-5440 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | 1.94 ACRES SWLY PTN OF LOT 8 POLHEMUS TRACT RSM 2/35 TOWN OFATHERTON |
| Legal Subdivision | POLHEMUS TRACT |
| Legal Lot Number | 8 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 611400 |
Source: San Mateo County records, as of July 15, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Company Names on Record |
|---|---|
| Mailing Address | 214 POLHEMUS AVE, ATHERTON, CA 94027-5440 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Aug 29, 2021 |
| Transfer Doc | 0000133992 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Sep 17, 2021 |
| Property Address | 214 POLHEMUS AVE, ATHERTON, CA 94027-5440 |
| Document Number | 0000133992 |
| Map Reference | MB C PG 64 |
| Instrument Date | Aug 29, 2021 |
| Instrument | 2021-133992 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 214 POLHEMUS AVE, ATHERTON, CA 94027-5440 |
Source: San Mateo County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| Municipality | Atherton Town |
| County | San Mateo County |
| Elementary School District | Las Lomitas Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $2,151,857 (+2%) Land $1,245,816 Building $906,041 | ||
| 2025 | $24,474.00 (+2.95%) Homeowner's exemption | $2,109,665 (+4.04%) Land $1,221,389 Building $888,276 | |
| 2023 | $23,772.00 (+2.86%) Homeowner's exemption | $2,027,746 Land $1,173,962 Building $853,784 | $7,627,680 |
| 2022 | $23,112.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 |
| Flood Insurance Cost | Premium on Record median of 10 policies |
| Nearby Flood Policies | 10 in force |
| Nearby Flood Claims | 1 (2022) |
| Claims Outside the SFHA | 1 of 1 |
| 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 95% of the US · lower than 97% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 - BEAR GULCH private · serves 60,382 people · EPA ID CA4110006 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Feb 2025 |
| Lead | 4 ppb (2022–2024) 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 160 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Race Communications Fiber | 10,000 / 10,000 |
| AT&T Fiber · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: Etheric Networks, Verizon.
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