Santa Clara County property record for 583 Belfast Ct, Sunnyvale, CA 94087
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,564 sqft · built 1959 |
| Lot Size | 0.137 acres (5,978 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $1,615,000 (Sep 2016) |
| Tax Bill | $21,974 (2025) |
| Deeds & Mortgages | Dec 2025 Transfer |
| Flood Zone | Zone X (moderate risk) |
| APN | 309-02-037 |
| Primary APN | 309-02-037 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 1,564 sqft Living Area |
| 1st Floor Area | 1,564 sqft |
| Family Room | Family Room |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1959 |
|---|---|
| Effective Year Built | Effective 1959 |
| Architectural Style | Custom Design |
| Construction Type | Wood |
| Lot Area | 5,978 sqft (0.137 acres) |
| Lot Dimensions | 98 ft deep x 61 ft wide |
| Garage Area | 500 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Heating System | HVAC |
|---|
| Street Address | 583 BELFAST CT |
|---|---|
| City | SUNNYVALE |
| State | CA |
| Zip | 94087-3365 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R0 |
| Legal Description | TRACT 2064 COUNTRY LANE BOOK 94 PAGE 17 LOT 23 |
| Legal Subdivision | COUNTRY LANE |
| Legal Tract | 2064 |
| Legal Lot Number | 23 |
| Jurisdiction | SANTA CLARA CA |
| Township / Civil Division | SAN JOSE |
| Census Block Group | 2 |
| Census Block | 2001 |
| Census Tract | 508203 |
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 Company Names on Record |
|---|---|
| Mailing Address | 583 BELFAST CT, SUNNYVALE, CA 94087-3365 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust, Family Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 9, 2016 · Amount on Record |
| Deed Sale | Sep 9, 2016 · Amount on Record |
| Deed Document Number | 201623426469 |
| Prior Transfer Date | Jul 31, 1997 |
| Prior Transfer Doc | 0013819423 |
| Record Updated | Oct 29, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SANTA CLARA CA |
| Recording Date | Dec 9, 2025 |
| Property Address | 583 BELFAST CT, SUNNYVALE, CA 94087-3365 |
| Document Number | 0025915720 |
| Map Reference | MB 94 PG 17 |
| Instrument Date | May 22, 2025 |
| Instrument | 25915720 |
| Transaction Type | Transfer |
| Record Updated | Dec 17, 2025 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 583 BELFAST CT, SUNNYVALE, CA 94087-3365 |
Source: Santa Clara County assessment roll, as of July 27, 2026
| Type | Name |
|---|---|
| State | California |
| County | Santa Clara County |
| Municipality | Sunnyvale 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 | $1,911,824 (+2%) Land $1,529,461 Building $382,363 | |
| 2025 | $21,974.00 (+3.53%) | $1,874,338 (+4.04%) Land $1,499,472 Building $374,866 |
| 2023 | $21,224.00 (+0.93%) | $1,801,557 Land $1,441,247 Building $360,310 |
| 2022 | $21,028.00 |
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 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 | 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 | CITY OF SUNNYVALE serves 157,566 people · EPA ID CA4310014 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Sep 2024 |
| Lead | Under 1 ppb (2023–2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 63 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 787 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Etheric Networks Fixed Wireless | 250 / 100 |
| Ridge Wireless Fixed Wireless | 100 / 60 |
| AT&T Fixed Wireless · DSL · Fiber in parts of the area | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: GeoLinks.
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