San Mateo County property record for 228 Polhemus Ave, Atherton, CA 94027 · Last verified July 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 4.5 Baths |
| Year Built | Built 2011 |
| Square Footage | 5,959 sqft Living Area |
| Lot Size | 1 acres |
| Occupancy | Owner Occupied |
| Last Sale | $15,700,000 (2024) |
| Tax Bill | $177,729.00 (2025) |
| Primary APN | 070-022-710 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Partial Baths | 1 Partial Baths |
| Total Rooms | 11 Rooms |
| Building Area | 5,959 sqft Living Area |
| 1st Floor | 4,372 sqft 1st Floor |
| 2nd Floor | 1,587 sqft 2nd Floor |
| Family Room | Family Room |
| Stories | 2 Stories |
| Study | Study |
| Year Built | Built 2011 |
|---|---|
| Effective Year Built | Effective 2011 |
| Lot Area | 43,660 sqft |
| Depth X Width | 247 ft x 172 ft Depth x Width |
| Parking Spaces | 3 Parking Spaces |
| Garage Area | 861 sqft Garage |
| Cooling System | Central Cooling |
|---|---|
| Heating System | Central Heating |
| Street Address | 228 POLHEMUS AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-5439 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | 1.00 AC MOL ON WLY COR OF BETTY LANE & POLHEMUS AVE BEING ELY PTN OF LOT 21 POLHEMUS TRACT RSM 2/35 |
| Legal Subdivision | POLHEMUS TRACT |
| Legal Lot Number | 21 |
| Jurisdiction | SAN MATEO CA |
| Minor Civil Division | SAN MATEO |
| Census Blockgroup | 3 |
| Census Block | 3000 |
| Census Tract | 611400 |
Source: San Mateo County records · APN 070-022-710
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 Company Names on File |
|---|---|
| Mailing Address | 228 POLHEMUS AVE, ATHERTON, CA 94027-5439 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is a Company |
| Vesting | Owner is a Trust, Trust |
| Date | Document |
|---|---|
| Apr 23, 2026 | Grant Deed, Transfer NONE LISTED ON DOCUMENT |
| Mar 14, 2024 | Grant Deed, Transfer LAWYERS TITLE COMPANY/CA, LAWYERS TITLE COMPANY |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Mar 14, 2024 · Amount on Record |
| Deed Sale | Mar 14, 2024 · Amount on Record |
| Prior Sale | Aug 12, 2008 · Amount on Record |
| Deed Doc Number | 202413448 |
| Prior Transfer Date | Jan 03, 2005 |
| Prior Transfer Doc | 0000003194 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Apr 23, 2026 |
| Property Address | 228 POLHEMUS AVE, ATHERTON, CA 94027-5439 |
| Document Number | 0000021514 |
| Instrument Date | Apr 21, 2026 |
| Instrument | 202621514 |
| Transaction Type | Transfer |
| Record Updated | Jul 12, 2026 |
| Title Company | NONE LISTED ON DOCUMENT |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Full Amount Stated |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Trust |
| Address | 228 POLHEMUS AVE, ATHERTON, CA 94027-5439 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Mar 14, 2024 |
| Property Address | 228 POLHEMUS AVE, ATHERTON, CA 94027-5439 |
| Document Number | 0000013448 |
| Map Reference | MB C PG 64 |
| Instrument Date | Mar 08, 2024 |
| Instrument | 2024-013448 |
| Transaction Type | Transfer |
| Record Updated | Apr 04, 2024 |
| Title Company | LAWYERS TITLE COMPANY/CA, LAWYERS TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Tax | $17,270.00 |
| Amount Accuracy | Rounded Values by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 228 POLHEMUS AVE, ATHERTON, CA 94027-5439 |
Source: San Mateo County records · Assessment roll updated July 15, 2026 · Last verified July 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) |
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 | $16,334,280 (+2%) Land $10,346,778 Building $5,987,502 | ||
| 2025 | $177,729.00 (+52.32%) | $16,014,000 (+57.63%) Land $10,143,900 Building $5,870,100 | |
| 2024 | $116,682.00 (+1.6%) | ||
| 2023 | $114,850.00 (+2.86%) Homeowner's exemption | $10,159,114 Land $5,631,807 Building $4,527,307 | $8,132,220 |
| 2022 | $111,659.00 |
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