Santa Clara County property record for 21583 Castleton St, Cupertino, CA 95014 · Last verified October 2025
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 4 Beds |
| Bathrooms | 5 Baths |
| Year Built | Built 2024 |
| Square Footage | 2,472 sqft Living Area |
| Lot Size | 7,500 sqft (0.172 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $2,300,000 (2017) |
| Tax Bill | $35,832.00 (2025) |
| Primary APN | 356-18-058 |
|---|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 5 Baths |
| Total Rooms | 7 Rooms |
| Building Area | 2,472 sqft Living Area |
| Gross Area | 2,102 sqft Gross Area |
| 1st Floor | 1,338 sqft 1st Floor |
| 2nd Floor | 764 sqft 2nd Floor |
| Stories | 2 Stories |
| Fireplace | Fireplace |
| Fireplaces | 2 Fireplaces |
| Year Built | Built 2024 |
|---|---|
| Architectural Style | Other Style |
| Construction Type | Wood Construction |
| Lot Area | 7,500 sqft (0.172 acres) |
| Depth X Width | 100 ft x 75 ft Depth x Width |
| Parking Spaces | 2 Parking Spaces |
| Garage Area | 484 sqft Garage |
| Total Buildings | 2 Total Buildings |
| Heating System | HVAC Heating |
|---|
| Street Address | 21583 CASTLETON ST |
|---|---|
| City | CUPERTINO |
| State | CA |
| Zip | 95014-4702 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | TR 4103 LOT 31 |
| Legal Subdivision | MONTEBELLO |
| Legal Tract | 4103 |
| Legal Lot Number | 31 |
| Jurisdiction | SANTA CLARA CA |
| Minor Civil Division | SAN JOSE |
| Census Blockgroup | 2 |
| Census Block | 2006 |
| Census Tract | 507702 |
Source: Santa Clara County records · APN 356-18-058
Assessment roll updated July 1, 2025 · Last verified October 2025
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on File |
|---|---|
| Co-owner | Verified Secondary Owner |
| Mailing Address | 21583 CASTLETON ST, CUPERTINO, CA 95014-4702 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Date | Document |
|---|---|
| Jun 25, 2021 | Deed of Trust, Mortgage · Conventional Mortgage HSBC BANK USA |
| Jul 20, 2017 | Grant Deed, Transfer · Adjustable Rate Mortgage (ARM) MUFG UNION BANK NA |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Jul 20, 2017 · Amount on Record |
| Deed Sale | Jul 20, 2017 · Amount on Record |
| Prior Sale | Sep 19, 1997 · Amount on Record |
| Deed Doc Number | 23706549 |
| Record Refreshed | Jun 08, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SANTA CLARA CA |
| Property Address | 21583 CASTLETON ST, CUPERTINO, CA 95014-4702 |
| Transaction Type | Mortgage |
| Record Updated | Jul 05, 2021 |
| Title Company | WFT NATIONAL TITLE, WFG NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 21583 CASTLETON ST, CUPERTINO, CA 95014-4702 |
| Document Number | 0025009049 |
|---|---|
| Date | Jun 25, 2021 |
| Instrument | 25009049 |
| Name | HSBC BANK USA |
|---|---|
| Type | Bank |
| Address | NEW YORK, NY 10018 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Jul 01, 2051 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 1.96% |
| Type Change Date | Jul 01, 2028 |
| Change Frequency | 6 Months |
| Min Rate At Change | 3% |
| Max Rate At Change | 6.96% |
| Index | Other |
| Margin | 3 |
| Max Rate | 6.96% |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | SANTA CLARA CA |
| Recording Date | Jul 20, 2017 |
| Property Address | 21583 CASTLETON ST, CUPERTINO, CA 95014-4702 |
| Document Number | 0023706549 |
| Map Reference | MB206 PG16&17 |
| Instrument Date | Jul 19, 2017 |
| Instrument | 23706549 |
| Transaction Type | Transfer |
| Record Updated | Sep 01, 2021 |
| Title Company | CORNERSTONE TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded Values by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property (Marital Community) with Rights of Survivorship |
| Address | 21583 CASTLETON ST, CUPERTINO, CA 95014-4702 |
| Document Number | 0023706550 |
|---|---|
| Date | Jul 20, 2017 |
| Instrument | 23706550 |
| Name | MUFG UNION BANK NA |
|---|---|
| Type | Bank |
| Type | Adjustable Rate Mortgage (ARM) |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Aug 01, 2047 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 2.87% |
| Type Change Date | Aug 01, 2024 |
| Change Frequency | Annually |
| Min Rate At Change | 2.25% |
| Max Rate At Change | 4.87% |
| Index | 1-Year LIBOR |
| Max Rate | 8.87% |
Source: Santa Clara County records · Assessment roll updated July 1, 2025 · Last verified October 2025
| 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) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $35,832.00 (+18.04%) Homeowner's exemption | $2,991,400 (+18.92%) Land $2,184,629 Building $806,771 |
| 2023 | $30,357.00 (+1.37%) Homeowner's exemption | $2,515,382 Land $2,099,799 Building $415,583 |
| 2022 | $29,946.00 |
21583 Castleton St is in FEMA Zone X (moderate — 0.2% annual chance (shaded X)), outside the Special Flood Hazard Area, with no wildfire exposure.
Source: FEMA National Flood Hazard Layer · Santa Clara County (06085C), updated January 18, 2026
| FEMA Flood Zone | Zone X moderate — 0.2% annual chance (shaded X) |
|---|---|
| Special Flood Hazard Area | No |
Source: USDA Forest Service Wildfire Risk to Communities · 2nd edition (2024)
| Wildfire Risk to Homes | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond ember reach of burnable land |
Lookups use the parcel center point against federal datasets; a lot that straddles a boundary may differ at its edges, and lenders make the official flood determination. Wildfire values come from a national model at roughly 900 ft resolution with fuels as of 2020 and describe conditions, not a forecast.
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