San Mateo County property record for 49 Atherton Ave, Atherton, CA 94027
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 5.5 ba · 6,490 sqft · built 1999 |
| Lot Size | 0.933 acres (40,626 sqft) |
| Owner | Company Name on File |
| Last Sale | $15,800,000 (Sep 2026) |
| Tax Bill | $93,451 (2025) |
| Deeds & Mortgages | Sep 2026 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 070-230-190 |
| Primary APN | 070-230-190 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 5.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 14 Rooms |
| Stories | 2 Stories |
| Building Area | 6,490 sqft Living Area |
| Gross Area | 7,250 sqft |
| 1st Floor Area | 3,650 sqft |
| 2nd Floor Area | 2,840 sqft |
| Basement Area | 760 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 1999 |
|---|---|
| Effective Year Built | Effective 1999 |
| Lot Area | 40,626 sqft (0.933 acres) |
| View / Lot | Corner |
| Garage Type | Basement |
| Garage Area | 760 sqft |
| Parking Spaces | 3 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 49 ATHERTON AVE |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-4048 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1001A |
| Legal Description | LOT 1 ATHERTON GLEN RSM 40/21 TOWN OF ATHERTON |
| Legal Subdivision | ATHERTON GLEN |
| Legal Lot Number | 1 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 611400 |
49 Atherton Ave is owned by a company that bought it in September 2026.
Source: San Mateo County records, as of October 22, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 49 ATHERTON AVE, ATHERTON, CA 94027-4048 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
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 | Name on Deed |
|---|---|
| Last Sale | Sep 21, 2026 · Amount on File |
| Deed Sale | Sep 21, 2026 · Amount on File |
| Prior Sale | Nov 4, 2014 · Amount on File |
| Deed Document Number | 202653303 |
| Prior Transfer Date | Sep 29, 2010 |
| Prior Transfer Doc | 0000117298 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Recording Date | Sep 21, 2026 |
| Property Address | 49 ATHERTON AVE, ATHERTON, CA 94027-4048 |
| Document Number | 0000053303 |
| Instrument Date | Sep 17, 2026 |
| Instrument | 202653303 |
| Transaction Type | Transfer |
| Record Updated | Oct 21, 2026 |
| Title Company | LAWYERS LAND TITLE COMPANY, LAWYERS TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $1,755,380.00 |
| Amount Accuracy | Full Amount Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Limited Liability Partnership |
| Address | 49 ATHERTON AVE, ATHERTON, CA 94027-4048 |
| Document Number | 0000053304, |
|---|---|
| Date | Sep 21, 2026 |
| Instrument | 202653304 |
| Name | CITIZENS BANK |
|---|
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Oct 1, 2056 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 4.63% |
| Initial Type | Adjustable Rate |
| Adjustable | Adjustable Rate Rider |
| Max Rate | -1% |
The 2025 property tax bill for 49 Atherton Ave was $93,451.
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 | $8,458,613 (+2%) Land $5,191,628 Building $3,266,985 | |
| 2025 | $93,451.00 Homeowner's exemption | $8,292,759 Land $5,089,832 Building $3,202,927 |
| 2023 | $89,161.00 (+2.42%) Homeowner's exemption | $7,970,743 Land $4,892,189 Building $3,078,554 |
| 2022 | $87,053.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 49 Atherton Ave 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 Atherton Ave is low, with a 0.02% 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 | 0.02% 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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