San Mateo County property record for 331 Ashton Ave, Millbrae, CA 94030
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3 ba · 2,180 sqft · built 1941 |
| Lot Size | 0.139 acres (6,050 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,418,000 (Sep 2014) |
| Tax Bill | $21,250 (2025) |
| Deeds & Mortgages | May 2021 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 024-095-100 |
| Primary APN | 024-095-100 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 2,180 sqft Living Area |
| Gross Area | 4,790 sqft |
| 1st Floor Area | 2,180 sqft |
| Attic | Attic |
| Attic Area | 980 sqft |
| Basement Area | 1,630 sqft |
| Family Room | Family Room |
| Year Built | Built 1941 |
|---|---|
| Effective Year Built | Effective 1941 |
| Lot Area | 6,050 sqft (0.139 acres) |
| Lot Dimensions | 110 ft deep x 55 ft wide |
| Garage Type | Basement |
| Garage Area | 1,630 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 331 ASHTON AVE |
|---|---|
| City | MILLBRAE |
| State | CA |
| Zip | 94030-2363 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 7 BLOCK 40 MILLBRAE HIGHLANDS NO 4 |
| Legal Subdivision | MILLBRAE HIGHLANDS NO 4 |
| Legal Block | 40 |
| Legal Lot Number | 7 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SOUTH SAN FRANCISCO |
| Census Block Group | 2 |
| Census Block | 2012 |
| Census Tract | 604800 |
331 Ashton Ave is owned and occupied by two individuals who bought it in September 2014.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 331 ASHTON AVE, MILLBRAE, CA 94030-2363 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
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 | Sep 9, 2014 · Amount on File |
| Deed Sale | Sep 9, 2014 · Amount on File |
| Deed Document Number | 201481469 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 331 ASHTON AVE, MILLBRAE, CA 94030-2363 |
| Transaction Type | Mortgage |
| Record Updated | Aug 5, 2022 |
| Title Company | ATLANTIS TITLE COMPANY, ATLAS TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 331 ASHTON AVE, MILLBRAE, CA 94030-2363 |
| Document Number | 0000070238 |
|---|---|
| Date | May 3, 2021 |
| Instrument | 2021-070238 |
| Name | RESICENTRAL LLC |
|---|---|
| Type | Non-Lending Institution |
| Address | PHOENIX, AZ 85040 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | May 1, 2051 |
The 2025 property tax bill for 331 Ashton Ave was $21,250 with a homeowner's exemption.
Source: San Mateo County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Mateo County |
| Municipality | Millbrae City |
| Elementary School District | Millbrae 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 | $1,738,300 (+2%) Land $869,150 Building $869,150 | ||
| 2025 | $21,250.00 Homeowner's exemption | $1,704,216 Land $852,108 Building $852,108 | |
| 2023 | $19,918.00 (+10.08%) Homeowner's exemption | $1,638,040 Land $819,020 Building $819,020 | $1,477,980 |
| 2022 | $18,094.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 331 Ashton Ave in Zone X, an area of minimal flood risk.
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 | 4 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.
The area around 331 Ashton Ave has no burnable land within ember reach, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 | CITY OF MILLBRAE serves 22,795 people · EPA ID CA4110018 |
|---|---|
| Water Source | Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM |
| Last State Inspection | Apr 2025 |
| 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 | 1 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 802 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · Fixed Wireless, DSL in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Sail Internet, Verizon.
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