Santa Clara County property record for 643 Jay St, Los Altos, CA 94022
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1.5 ba · 1,408 sqft · built 1950 |
| Lot Size | 0.457 acres (19,900 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $5,900,000 (Feb 2026) |
| Tax Bill | $2,918 (2025) |
| Deeds & Mortgages | Feb 2026 Sale & Mortgage |
| Flood Zone | Zone X (moderate risk) |
| APN | 170-20-056 |
| Primary APN | 170-20-056 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,408 sqft Living Area |
| 1st Floor Area | 1,408 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1950 |
|---|---|
| Effective Year Built | Effective 1950 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 19,900 sqft (0.457 acres) |
| Lot Dimensions | 199 ft deep x 100 ft wide |
| Garage Area | 484 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Cooling System | None |
|---|
| Street Address | 643 JAY ST |
|---|---|
| City | LOS ALTOS |
| State | CA |
| Zip | 94022-2364 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | TRACT 223 EL MONTE COURT BOOK 7 PAGE 49 LOT 6 |
| Legal Subdivision | EL MONTE COURT |
| Legal Tract | 223 |
| Legal Lot Number | 6 |
| Jurisdiction | SANTA CLARA CA |
| Township / Civil Division | SAN JOSE |
| Census Block Group | 3 |
| Census Block | 3000 |
| Census Tract | 510400 |
Source: Santa Clara County records, as of July 27, 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 | 10800 MAGDALENA RD, LOS ALTOS HILLS, CA 94024-6439 |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Feb 17, 2026 · Amount on Record |
| Deed Sale | Feb 17, 2026 · Amount on Record |
| Deed Document Number | 202625944727 |
| Prior Transfer Date | Apr 20, 2011 |
| Prior Transfer Doc | 0000079070 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SANTA CLARA CA |
| Recording Date | Feb 17, 2026 |
| Property Address | 643 JAY ST, LOS ALTOS, CA 94022-2364 |
| Document Number | 0025944727 |
| Map Reference | MB 7 PG 49 |
| Instrument Date | Feb 4, 2026 |
| Instrument | 25944727 |
| Transaction Type | Transfer |
| Record Updated | Mar 6, 2026 |
| Title Company | CHICAGO TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $6,490.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Right of Survivorship |
| Address | 10800 MAGDALENA RD, LOS ALTOS HILLS, CA 94024-6439 |
| Document Number | 0025944728 |
|---|---|
| Date | Feb 17, 2026 |
| Instrument | 25944728 |
| Name | ROCKET MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Mar 1, 2056 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 4.62% |
| Adjustable | Adjustable Rate Rider |
| Type Change Date | Mar 1, 2033 |
| Change Frequency | 6 Months |
| Min Rate At Change | 3% |
| Max Rate At Change | 9.62% |
| Index | Other |
| Margin | 3 |
| Max Rate | 9.62% |
Source: Santa Clara County assessment roll, as of July 27, 2026
| Type | Name |
|---|---|
| State | California |
| County | Santa Clara County |
| Municipality | Los Altos City |
| Elementary School District | Los Altos Elementary School District (KG - 08) |
| Secondary School District | Mountain View-Los Altos Union School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $4,855,414 (+3,313.25%) Land $4,690,824 Building $164,590 | |
| 2025 | $2,918.00 (+11.2%) | $142,252 (+4.04%) Land $63,733 Building $78,519 |
| 2024 | $2,624.00 (+4.92%) | |
| 2023 | $2,501.00 (+5.22%) Homeowner's exemption | $136,730 Land $61,259 Building $75,471 |
| 2022 | $2,377.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
Source: FEMA National Flood Hazard Layer, effective January 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 2 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 | CWSC LOS ALTOS SUBURBAN private · serves 63,559 people · EPA ID CA4310001 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Aug 2024 |
| Lead | 2 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 601 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 · Fiber in parts of the area | 2,000 / 250 |
| Cruzio Fixed Wireless | 1,000 / 1,000 |
| Verizon Fixed Wireless | 300 / 20 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| Ridge Wireless Fixed Wireless | 100 / 60 |
May also be available: GeoLinks, T-Mobile.
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