San Mateo County property record for 3221 Upper Lock Ave, Belmont, CA 94002
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 2,010 sqft · built 1964 |
| Lot Size | 0.135 acres (5,885 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $1,399,500 (Jun 2016) |
| Tax Bill | $21,796 (2025) |
| Deeds & Mortgages | Jun 2019 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 043-122-120 |
| Primary APN | 043-122-120 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 2,010 sqft Living Area |
| Gross Area | 2,440 sqft |
| 1st Floor Area | 1,500 sqft |
| Basement Area | 430 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1964 |
|---|---|
| Effective Year Built | Effective 1964 |
| Exterior Material | Stucco |
| Roof Material | Tar & Gravel |
| Lot Area | 5,885 sqft (0.135 acres) |
| Lot Dimensions | 111 ft deep x 50 ft wide |
| Garage Type | Basement |
| Garage Area | 430 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Central |
| Street Address | 3221 UPPER LOCK AVE |
|---|---|
| City | BELMONT |
| State | CA |
| Zip | 94002-1349 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10006 |
| Legal Description | LOT 3 BLK 94 BELMONT CO CLUB PROP 8 |
| Legal Subdivision | BELMONT CO CLUB PROP 8 |
| Legal Block | 94 |
| Legal Lot Number | 3 |
| Jurisdiction | SAN MATEO CA |
| Township / Civil Division | SAN MATEO |
| Census Block Group | 5 |
| Census Block | 5005 |
| Census Tract | 608800 |
Source: San Mateo County records, as of July 15, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 3221 UPPER LOCK AVE, BELMONT, CA 94002-1349 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 23, 2016 · Amount on Record |
| Deed Sale | Jun 23, 2016 · Amount on Record |
| Prior Sale | Jul 14, 2003 · Amount on Record |
| Deed Document Number | 201661035 |
| Prior Transfer Date | Jun 16, 2000 |
| Prior Transfer Doc | 0000076356 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SAN MATEO CA |
| Property Address | 3221 UPPER LOCK AVE, BELMONT, CA 94002-1349 |
| Document Number | 0000049487 |
| Instrument Date | Jun 14, 2019 |
| Transaction Type | Mortgage |
| Record Updated | Jul 25, 2019 |
| Title Company | NOT AVAILABLE |
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 3221 UPPER LOCK AVE BELMONT CA 940021349, BELMONT, CA 94002-1349 |
| Document Number | 0000049487 |
|---|---|
| Date | Jun 26, 2019 |
| Instrument | 49487 |
| Name | SAN MATEO CU |
|---|---|
| Type | Credit Union |
| Address | REDWOOD CITY, CA 94063 |
| Amount | Amount Recorded |
|---|---|
| Term | 360 Months |
| Due | Jun 25, 2049 |
Source: San Mateo County assessment roll, as of July 15, 2026
| Type | Name |
|---|---|
| State | California |
| Municipality | Belmont City |
| County | San Mateo County |
| Elementary School District | Belmont-Redwood Shores Elementary School District (KG - 08) |
| Secondary School District | Sequoia Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value | Assessed Market Value |
|---|---|---|---|
| 2026 | $1,765,858 (+2%) Land $1,207,469 Building $558,389 | ||
| 2025 | $21,796.00 (+7.66%) Homeowner's exemption | $1,731,236 (+4.04%) Land $1,183,794 Building $547,442 | |
| 2023 | $20,246.00 (+3.53%) Homeowner's exemption | $1,664,012 Land $1,137,827 Building $526,185 | $3,672,810 |
| 2022 | $19,556.00 |
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 Claims | 1 (1980) |
| Most Recent Claim | Jan 1980 · tidal / storm surge |
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 | MID-PENINSULA WATER DISTRICT serves 31,059 people · EPA ID CA4110001 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Feb 2025 |
| Lead | Under 1 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 434 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| AT&T Fiber | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
May also be available: Etheric Networks, T-Mobile, Verizon.
5G (outdoors only) and 4G LTE
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