San Mateo County property record for 40 Aster Ave, Hillsborough, CA 94010
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 4 ba · 4,370 sqft · built 1938 |
| Lot Size | 0.495 acres (21,574 sqft) |
| Owner | 2 Company Names on Record |
| Tax Bill | $28,520 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 028-262-050 |
| Primary APN | 028-262-050 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 4,370 sqft Living Area |
| Gross Area | 4,890 sqft |
| 1st Floor Area | 2,100 sqft |
| 2nd Floor Area | 1,810 sqft |
| Basement Area | 520 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1938 |
|---|---|
| Effective Year Built | Effective 1938 |
| Architectural Style | Colonial |
| Exterior Material | Brick |
| Construction Type | Brick |
| Lot Area | 21,574 sqft (0.495 acres) |
| Lot Dimensions | 150 ft deep x 140 ft wide |
| Garage Type | Carport |
| Carport | Carport |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 40 ASTER AVE |
|---|---|
| City | HILLSBOROUGH |
| State | CA |
| Zip | 94010-6442 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10025 |
| Legal Description | 150 FT ON ASTER AVE BEING A PTN OF LOTS 9 10 BLOCK 2 BURLINGAME PARK NO 3 RSM C/63 TOWN OF HILLSBOROUGH |
| Legal Subdivision | BURLINGAME PARK NO 3 |
| Legal Block | 2 |
| Legal Lot Number | 9 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 605600 |
Source: San Mateo County records, as of August 14, 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 Record |
|---|---|
| Mailing Address | 40 ASTER AVE, HILLSBOROUGH, CA 94010-6442 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Dec 12, 2005 |
| Transfer Doc | 0000220281 |
| Record Updated | Sep 20, 2026 |
Source: San Mateo County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Mateo County |
| Municipality | Hillsborough Town |
| Elementary School District | Hillsborough City Elementary School District (KG - 08) |
| Secondary School District | San Mateo Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $2,125,411 (+2%) Land $972,597 Building $1,152,814 | ||
| 2025 | $28,520.00 (+1.41%) Homeowner's exemption | $2,083,738 (+4.04%) Land $953,527 Building $1,130,211 | |
| 2023 | $28,124.00 (+4.14%) Homeowner's exemption | $2,002,828 Land $916,501 Building $1,086,327 | $6,396,750 |
| 2022 | $27,006.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
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 | 3 in force |
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 99.1% of the US · lower than 99.2% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
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 | TOWN OF HILLSBOROUGH serves 11,766 people · EPA ID CA4110016 |
|---|---|
| Water Source | Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM |
| Last State Inspection | Mar 2026 |
| Lead | Under 1 ppb (2023–2025) 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 561 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
| Sonic Telecom Fiber | 1,000 / 1,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
May also be available: Etheric Networks, T-Mobile.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures