Santa Clara County property record for 645 Mills Ave, Los Altos, CA 94022
| Property Type | Single Family Home |
|---|---|
| Details | 5 bd · 4 ba · 2,968 sqft · built 1958 |
| Lot Size | 0.268 acres (11,676 sqft) |
| Owner | Trust Name on File |
| Tax Bill | $5,436 (2025) |
| Flood Zone | Zone X (moderate risk) |
| APN | 189-34-017 |
| Primary APN | 189-34-017 |
|---|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 4 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,968 sqft Living Area |
| Gross Area | 1,290 sqft |
| 1st Floor Area | 1,290 sqft |
| Family Room | Family Room |
| Utility Room | Utility Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1958 |
|---|---|
| Effective Year Built | Effective 1958 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 11,676 sqft (0.268 acres) |
| Lot Dimensions | 139 ft deep x 84 ft wide |
| Garage Area | 616 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | None |
| Heating System | HVAC |
|---|
| Street Address | 645 MILLS AVE |
|---|---|
| City | LOS ALTOS |
| State | CA |
| Zip | 94022-3132 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R110 |
| Legal Description | TRACT 697 BERKELEY PARK BOOK 26 PAGE 35 LOT 4 |
| Legal Subdivision | BERKELEY PARK |
| Legal Tract | 697 |
| Legal Lot Number | 4 |
| Jurisdiction | SANTA CLARA CA |
| Township / Civil Division | SAN JOSE |
| Census Block Group | 1 |
| Census Block | 1002 |
| Census Tract | 510200 |
645 Mills Ave is owner-occupied and held in a trust since March 2003.
Source: Santa Clara County records, as of July 27, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 645 MILLS AVE, LOS ALTOS, CA 94022-3132 |
| 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 | Name on Deed |
|---|---|
| Last Transfer Date | Mar 27, 2003 |
| Transfer Doc | 0016973132 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 645 Mills Ave was $5,436 with a homeowner's exemption.
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 | $283,323 (+2%) Land $54,868 Building $228,455 | |
| 2025 | $5,436.00 Homeowner's exemption | $277,769 Land $53,793 Building $223,976 |
| 2023 | $5,009.00 (+4.14%) Homeowner's exemption | $266,985 Land $51,705 Building $215,280 |
| 2022 | $4,810.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 645 Mills Ave in Zone X, an area of moderate flood risk.
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 | 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.
The area around 645 Mills 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 | 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 563 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 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| Ridge Wireless Fixed Wireless | 100 / 60 |
May also be available: GeoLinks, T-Mobile.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures