Santa Clara County property record for 21573 Castleton St, Cupertino, CA 95014
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 2,119 sqft · built 1966 |
| Lot Size | 0.172 acres (7,500 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $725,000 (Sep 1998) |
| Tax Bill | $14,249 (2025) |
| Deeds & Mortgages | May 2019 Line of Credit |
| Flood Zone | Zone X (moderate risk) |
| APN | 356-18-057 |
| Primary APN | 356-18-057 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 2,119 sqft Living Area |
| Gross Area | 2,039 sqft |
| 1st Floor Area | 2,039 sqft |
| Family Room | Family Room |
| Utility Room | Utility Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1966 |
|---|---|
| Effective Year Built | Effective 1966 |
| Architectural Style | L-Shape |
| Construction Type | Wood |
| Lot Area | 7,500 sqft (0.172 acres) |
| Lot Dimensions | 100 ft deep x 75 ft wide |
| Garage Area | 451 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Heating System | HVAC |
|---|
| Street Address | 21573 CASTLETON ST |
|---|---|
| City | CUPERTINO |
| State | CA |
| Zip | 95014-4702 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | TRACT 4103 MONTEBELLO BOOK 206 PAGE 16 PAGE 17 LOT 30 |
| Legal Subdivision | MONTEBELLO |
| Legal Tract | 4103 |
| Legal Lot Number | 30 |
| Jurisdiction | SANTA CLARA CA |
| Township / Civil Division | SAN JOSE |
| Census Block Group | 2 |
| Census Block | 2006 |
| Census Tract | 507702 |
Source: Santa Clara County records, as of August 14, 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 | 21573 CASTLETON ST, CUPERTINO, CA 95014-4702 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 16, 1998 · Amount on Record |
| Deed Sale | Sep 16, 1998 · Amount on Record |
| Deed Document Number | 199814392835 |
| Last Transfer Date | Jun 15, 2010 |
| Transfer Doc | 0020752905 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SANTA CLARA CA |
| Property Address | 21573 CASTLETON ST, CUPERTINO, CA 95014-4702 |
| Transaction Type | Mortgage |
| Record Updated | Feb 5, 2021 |
| Title Company | SERVICELINK |
| Name | Verified Name |
|---|
| Document Number | 0024172103 |
|---|---|
| Date | May 6, 2019 |
| Instrument | 24172103 |
| Name | WELLS FARGO BANK NA |
|---|---|
| Type | Bank |
| Address | SIOUX FALLS, SD 57104 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | May 27, 2049 |
Source: Santa Clara County assessment roll, as of July 27, 2026
| Type | Name |
|---|---|
| State | California |
| County | Santa Clara County |
| Municipality | Cupertino City |
| Elementary School District | Cupertino Union Elementary School District (KG - 08) |
| Secondary School District | Fremont Union High School District (09 - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,159,311 (+2%) Land $879,483 Building $279,828 | |
| 2025 | $14,249.00 (+3.85%) Homeowner's exemption | $1,136,581 (+4.04%) Land $862,239 Building $274,342 |
| 2023 | $13,721.00 (+0.4%) Homeowner's exemption | $1,092,448 Land $828,758 Building $263,690 |
| 2022 | $13,666.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 6 (20% 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 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 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 | SAN JOSE WATER private · serves 1,039,920 people · EPA ID CA4310011 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Mar 2026 |
| Lead | Under 1 ppb (2023–2025) action level 15 ppb |
| Water Quality | Treatment failure resolved · Jun 2023 |
|---|---|
| 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 685 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Verizon Fixed Wireless | 1,000 / 75 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| Ridge Wireless Fixed Wireless | 100 / 60 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
May also be available: GeoLinks, T-Mobile.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures