San Mateo County property record for 33 Spencer Ln, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 5.5 ba · 8,339 sqft · built 1963 |
| Lot Size | 0.914 acres (39,790 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $5,300,000 (Jun 2009) |
| Tax Bill | $207,513 (2025) |
| Deeds & Mortgages | Jul 2020 Mortgage Oct 2020 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 070-230-240 |
| Primary APN | 070-230-240 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 5.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 16 Rooms |
| Stories | 2 Stories |
| Building Area | 8,339 sqft Living Area |
| 1st Floor Area | 3,646 sqft |
| 2nd Floor Area | 2,794 sqft |
| Basement Area | 1,899 sqft |
| Finished Basement | 1,899 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 1963 |
|---|---|
| Effective Year Built | Effective 1963 |
| Lot Area | 39,790 sqft (0.914 acres) |
| Lot Dimensions | 292 ft deep x 150 ft wide |
| Garage Area | 604 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 33 SPENCER LN |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-4038 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | LOT 10 ARDEN WOOD AMEND MAP RSM 13/74 TOWN OF ATHERTON |
| Legal Subdivision | ARDEN WOOD AMEND MAP |
| Legal Lot Number | 10 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 611400 |
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 Company Names on File |
|---|---|
| Mailing Address | 33 SPENCER LN, ATHERTON, CA 94027-4038 |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Jul 13, 2020 | Deed of Trust, Mortgage · Conventional Mortgage CITIBANK NA |
| Oct 5, 2020 | Grant Deed, Transfer FIRST AMERICAN TITLE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 19, 2009 · Amount on File |
| Deed Sale | Jun 19, 2009 · Amount on File |
| Deed Document Number | 200980619 |
| Prior Transfer Date | May 22, 2000 |
| Prior Transfer Doc | 0000075374 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 33 SPENCER LN, ATHERTON, CA 94027-4038 |
| Transaction Type | Mortgage |
| Record Updated | Aug 5, 2022 |
| Title Company | OLD REPUBLIC TITLE COMPANY |
| Name | Verified Name |
|---|
| Document Number | 0000066602 |
|---|---|
| Date | Jul 13, 2020 |
| Instrument | 2020-066602 |
| Name | CITIBANK NA |
|---|---|
| Type | Bank |
| Address | O FALLON, MO 63368 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Aug 1, 2050 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 2.25% |
| Type Change Date | Aug 1, 2030 |
| Change Frequency | Annually |
| Min Rate At Change | 2.25% |
| Max Rate At Change | 7.25% |
| Index | 1-Year LIBOR |
| Max Rate | 7.25% |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Oct 5, 2020 |
| Property Address | 33 SPENCER LN, ATHERTON, CA 94027-4038 |
| Document Number | 0000106016 |
| Instrument Date | Sep 28, 2020 |
| Instrument | 106016 |
| Transaction Type | Transfer |
| Record Updated | Nov 12, 2020 |
| Title Company | FIRST AMERICAN TITLE |
| Amount | Amount on Record |
|---|---|
| Tax | $18,975.00 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 33 SPENCER LN ATHERTON CA 940274038, ATHERTON, CA 94027-4038 |
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 | Menlo Park City Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $19,112,502 (+2%) Land $12,144,888 Building $6,967,614 | |
| 2025 | $207,513.00 (+4.76%) | $18,737,748 (+4.04%) Land $11,906,753 Building $6,830,995 |
| 2023 | $198,084.00 (+2.45%) | $18,010,140 Land $11,444,400 Building $6,565,740 |
| 2022 | $193,341.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 | 2 in force |
| Nearby Flood Claims | 2 (1998) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Feb 1998 · Severe Winter Storms And Flooding |
| Claims by Event |
|
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 94% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | Direct burnable vegetation |
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 283 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Race Communications Fiber | 10,000 / 10,000 |
| Xfinity Cable | 2,000 / 250 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
May also be available: Etheric Networks, GeoLinks, T-Mobile.
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