San Mateo County property record for 28 Serrano Dr, Atherton, CA 94027 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4.5 ba · 4,170 sqft · built 1936 |
| Lot Size | 0.897 acres (39,074 sqft) |
| Owner | Company Name on File |
| Tax Bill | $9,441 (2025) |
| Deeds & Mortgages | Dec 2018 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 059-281-080 |
| Primary APN | 059-281-080 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 11 Rooms |
| Stories | 1 Story |
| Building Area | 4,170 sqft Living Area |
| Gross Area | 4,570 sqft |
| 1st Floor Area | 1,770 sqft |
| Attic | Attic |
| Attic Area | 400 sqft |
| Family Room | Family Room |
| Study | Study |
| Year Built | Built 1936 |
|---|---|
| Effective Year Built | Effective 1936 |
| Lot Area | 39,074 sqft (0.897 acres) |
| Lot Dimensions | 177 ft deep x 248 ft wide |
| Garage Area | 400 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 28 SERRANO DR |
|---|---|
| City | ATHERTON |
| State | CA |
| Zip | 94027-3934 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOT 6 BLOCK 1 ATHERTON OAKS RSM 16/10 11 TOWN OF ATHERTON |
| Legal Subdivision | ATHERTON OAKS |
| Legal Block | 1 |
| Legal Lot Number | 6 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 4 |
| Census Block | 4006 |
| Census Tract | 611400 |
Source: San Mateo County records · APN 059-281-080
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 | Company Name on File |
|---|---|
| Mailing Address | 28 SERRANO DR, ATHERTON, CA 94027-3934 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Verified Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 28 SERRANO DR, ATHERTON, CA 94027-3934 |
| Transaction Type | Mortgage |
| Record Updated | Feb 05, 2021 |
| Name | Verified Name |
|---|
| Document Number | 0000099438 |
|---|---|
| Date | Dec 20, 2018 |
| Instrument | 2018-099438 |
| Name | MORGAN STANLEY PRIVATE BANK NA |
|---|---|
| Type | Bank |
| Address | CINCINNATI, OH 45245 |
| Type | ARM |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jan 01, 2049 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 3.75% |
| Type Change Date | Jan 01, 2026 |
| Change Frequency | Annually |
| Min Rate At Change | 2.5% |
| Max Rate At Change | 8.75% |
| Index | 1-Year CMT |
| Max Rate | 8.75% |
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 | Redwood City 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 | $770,326 (+2%) Land $124,755 Building $645,571 | ||
| 2025 | $9,441.00 (+3.26%) Homeowner's exemption | $755,222 (+4.04%) Land $122,309 Building $632,913 | |
| 2023 | $9,143.00 (+4.8%) Homeowner's exemption | $725,897 Land $117,560 Building $608,337 | $6,779,430 |
| 2022 | $8,724.00 |
Source: FEMA National Flood Hazard Layer, San Mateo County (06081C), updated September 10, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060816114004, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Flood Insurance Cost | Premium on Record median of 7 individual NFIP policies nearby |
| Nearby Flood Policies | 7 in force 5 of 7 on primary residences |
| Nearby Flood Claims | 8 (1979–2019) |
| Claims Outside the SFHA | 2 of 8 |
| Most Recent Claim | Jan 2019, other causes |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach |
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.
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