Santa Clara County property record for 1644 Heron Ave, Sunnyvale, CA 94087
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,230 sqft · built 1957 |
| Lot Size | 0.146 acres (6,363 sqft) |
| Owner | Company on Record |
| Tax Bill | $6,591 (2025) |
| Deeds & Mortgages | Jul 2022 Transfer Mar 2021 Mortgage |
| Flood Zone | Zone X (moderate risk) |
| APN | 309-48-036 |
| Primary APN | 309-48-036 |
|---|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 5 Rooms |
| Stories | 1 Story |
| Building Area | 1,230 sqft Living Area |
| 1st Floor Area | 1,230 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1957 |
|---|---|
| Effective Year Built | Effective 1957 |
| Architectural Style | L-Shape |
| Exterior Material | Stucco |
| Construction Type | Wood |
| Roof Material | Composition Shingle |
| Lot Area | 6,363 sqft (0.146 acres) |
| Lot Dimensions | 101 ft deep x 63 ft wide |
| Garage Area | 506 sqft |
| Parking Spaces | 2 Parking Spaces |
| Porch | Porch |
| Heating System | HVAC |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 1644 HERON AVE |
|---|---|
| City | SUNNYVALE |
| State | CA |
| Zip | 94087-4805 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R0 |
| Legal Description | TRACT 1638 LONDONDERRY GLEN BOOK 76 PAGE 56 LOT 10 |
| Legal Subdivision | LONDONDERRY GLEN |
| Legal Tract | 1638 |
| Legal Lot Number | 10 |
| Jurisdiction | SANTA CLARA CA |
| Township / Civil Division | SAN JOSE |
| Census Block Group | 3 |
| Census Block | 3008 |
| Census Tract | 508204 |
Source: Santa Clara County assessment roll, 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 | Company on Record |
|---|---|
| Mailing Address | 1644 HERON AVE, SUNNYVALE, CA 94087-4805 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| Jul 21, 2022 | Intrafamily Transfer, Transfer |
| Mar 12, 2021 | Deed of Trust, Mortgage · Conventional Mortgage STAR ONE CU |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Jul 14, 2022 |
| Transfer Doc | 0025339326 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | SANTA CLARA CA |
| Recording Date | Jul 21, 2022 |
| Property Address | 1644 HERON AVE, SUNNYVALE, CA 94087-4805 |
| Document Number | 0025339326 |
| Map Reference | MB 76 PG 56 |
| Instrument Date | Jul 14, 2022 |
| Instrument | 25339326 |
| Transaction Type | Transfer |
| Record Updated | Jun 7, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Living Trust |
| Address | 1644 HERON AVE, SUNNYVALE, CA 94087-4805 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | SANTA CLARA CA |
| Property Address | 1644 HERON AVE, SUNNYVALE, CA 94087-4805 |
| Transaction Type | Mortgage |
| Record Updated | Mar 23, 2021 |
| Title Company | CHICAGO TITLE COMPANY |
| Name | Verified Name |
|---|---|
| Address | 1644 HERON AVE, SUNNYVALE, CA 94087-4805 |
| Document Number | 0024872168 |
|---|---|
| Date | Mar 12, 2021 |
| Instrument | 24872168 |
| Name | STAR ONE CU |
|---|---|
| Type | Credit Union |
| Address | SUNNYVALE, CA 94088 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Apr 1, 2051 |
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 | $560,536 (+2%) Land $295,301 Building $265,235 | |
| 2025 | $6,591.00 (+3.5%) | $549,546 (+4.04%) Land $289,511 Building $260,035 |
| 2023 | $6,368.00 (-1.88%) | $528,209 Land $278,270 Building $249,939 |
| 2022 | $6,490.00 |
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
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; 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 499 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
May also be available: GeoLinks.
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