San Mateo County property record for 843 First Ave, Half Moon Bay, CA 94019
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,392 sqft · built 1970 |
| Lot Size | 0.112 acres (4,875 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,700,000 (Aug 2025) |
| Tax Bill | $16,172 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 064-081-390 |
| Primary APN | 064-081-390 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,392 sqft Living Area |
| 1st Floor Area | 1,392 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1970 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Ranch |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Other |
| Lot Area | 4,875 sqft (0.112 acres) |
| Lot Dimensions | 82 ft deep x 60 ft wide |
| View / Lot | Corner |
| Garage Area | 460 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 843 FIRST AVE |
|---|---|
| City | HALF MOON BAY |
| State | CA |
| Zip | 94019-1857 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | PARCEL B BLK 20 PARCEL MAP VOL 10/44 |
| Legal Subdivision | AMENDED MAP OF ARLETA PARK |
| Legal Block | 20 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | HALF MOON BAY |
| Census Block Group | 1 |
| Census Block | 1025 |
| Census Tract | 613701 |
843 First Ave is owned and occupied by two individuals who bought it in August 2025.
Source: San Mateo County records, as of July 15, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 843 FIRST AVE, HALF MOON BAY, CA 94019-1857 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 7, 2025 · Amount on File |
| Deed Sale | Aug 7, 2025 · Amount on File |
| Prior Sale | Nov 24, 2015 · Amount on File |
| Deed Document Number | 202540402 |
| Prior Transfer Date | Jun 7, 2007 |
| Prior Transfer Doc | 0000089574 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 843 First Ave was $16,172.
Source: San Mateo County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| County | San Mateo County |
| Municipality | Half Moon Bay City |
| Unified School District | Cabrillo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $1,362,529 (+8.62%) Land $402,166 Building $960,363 | ||
| 2025 | $16,172.00 | $1,254,457 Land $735,512 Building $518,945 | |
| 2023 | $14,596.00 (+2.21%) | $1,205,748 Land $706,952 Building $498,796 | $1,369,440 |
| 2022 | $14,280.00 |
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
FEMA maps place 843 First 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 | 7 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.
Wildfire risk around 843 First 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 67% of the US · lower than 81% of California |
|---|---|
| Wildfire Likelihood | 0.02% 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 | COASTSIDE COUNTY WATER DISTRICT serves 19,033 people · EPA ID CA4110011 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jul 2023 |
| Lead | 2 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 642 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Cruzio Fixed Wireless | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: T-Mobile.
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