San Mateo County property record for 49 Spencer Ln, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 3.5 ba · 4,990 sqft · built 1966 |
| Lot Size | 0.916 acres (39,913 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,725,000 (Nov 1993) |
| Tax Bill | $35,483 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 070-230-230 |
| Primary APN | 070-230-230 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 4,990 sqft Living Area |
| 1st Floor Area | 2,700 sqft |
| 2nd Floor Area | 2,290 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1966 |
|---|---|
| Effective Year Built | Effective 1966 |
| Architectural Style | Contemporary |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Material | Composition Shingle |
| Lot Area | 39,913 sqft (0.916 acres) |
| Lot Dimensions | 272 ft deep x 146 ft wide |
| Garage Area | 660 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 49 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 9 1.00 AC ARDEN WOOD AMEND MAP RSM 13/74 TOWN OF ATHERTON |
| Legal Subdivision | ARDEN WOOD AMEND MAP |
| Legal Lot Number | 9 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 611400 |
49 Spencer Ln is owned and occupied by two individuals who acquired it in November 1996.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 49 SPENCER LN, ATHERTON, CA 94027-4038 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Borrower in Default |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Nov 8, 1993 · Amount on File |
| Deed Sale | Nov 8, 1993 · Amount on File |
| Deed Document Number | 1993192122 |
| Last Transfer Date | Nov 1, 1996 |
| Transfer Doc | 0000137885 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 49 Spencer Ln was $35,483 with a homeowner's exemption.
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 | Assessed Market Value |
|---|---|---|---|
| 2026 | $3,040,549 (+2%) Land $1,495,305 Building $1,545,244 | ||
| 2025 | $35,483.00 Homeowner's exemption | $2,980,932 Land $1,465,986 Building $1,514,946 | |
| 2023 | $33,296.00 (+2.46%) Homeowner's exemption | $2,818,122 Land $1,409,061 Building $1,409,061 | $4,782,240 |
| 2022 | $32,496.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 49 Spencer Ln in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 1998.
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.
Wildfire risk around 49 Spencer Ln is low, with a 0.01% annual chance of wildfire.
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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