San Mateo County property record for 331 Grunion Ct, Foster City, CA 94404
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,780 sqft · built 1967 |
| Lot Size | 0.119 acres (5,183 sqft) |
| Owner | 2 Trust Names on File |
| Tax Bill | $6,381 (2025) |
| Flood Zone | Zone X (reduced by levee) |
| APN | 094-303-120 |
| Primary APN | 094-303-120 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,780 sqft Living Area |
| 1st Floor Area | 1,780 sqft |
| Family Room | Family Room |
| Year Built | Built 1967 |
|---|---|
| Effective Year Built | Effective 1967 |
| Lot Area | 5,183 sqft (0.119 acres) |
| Lot Dimensions | 95 ft deep x 56 ft wide |
| Garage Area | 430 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 331 GRUNION CT |
|---|---|
| City | FOSTER CITY |
| State | CA |
| Zip | 94404-1922 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 469 FOSTER CITY NEIGHBORHOOD NO 3 UNIT NO 2 RSM 62/43 50 |
| Legal Subdivision | FOSTER CITY NEIGHBORHOOD NO 3 UNIT NO 2 |
| Legal Lot Number | 469 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 2 |
| Census Block | 2007 |
| Census Tract | 608300 |
331 Grunion Ct is owner-occupied and held in a trust since December 2015.
Source: San Mateo County records, as of July 15, 2026
| Owner of Record | 2 Trust Names on File |
|---|---|
| Mailing Address | 331 GRUNION CT, FOSTER CITY, CA 94404-1922 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
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 Transfer Date | Dec 29, 2015 |
| Transfer Doc | 0000004288 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 331 Grunion Ct was $6,381 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 | Foster City |
| Elementary School District | San Mateo-Foster 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 | $573,240 (+2%) Land $286,620 Building $286,620 | ||
| 2025 | $6,381.00 Homeowner's exemption | $562,000 Land $281,000 Building $281,000 | |
| 2023 | $6,160.00 (+1.23%) Homeowner's exemption | $540,180 Land $270,090 Building $270,090 | $1,743,930 |
| 2022 | $6,085.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 331 Grunion Ct in Zone X, where a levee reduces 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 reduced by levee · depends on levee performance |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 6 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 Grunion Ct 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 | ESTERO MUNICIPAL IMPROVEMENT DISTRICT serves 36,556 people · EPA ID CA4110021 |
|---|---|
| Water Source | Purchased surface water from SAN FRANCISCO REGIONAL WATER SYSTEM |
| Last State Inspection | Nov 2024 |
| 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 636 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 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks, Sail Internet.
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