Contra Costa County property record for 1743 Sunnyvale Ave, Walnut Creek, CA 94597
| Property Type | Religious, Church, Worship (Synagogue, Temple, Parsonage) |
|---|---|
| Details | 5,366 sqft · built 1942 |
| Lot Size | 1.3 acres (57,064 sqft) |
| Owner | Company Name on File |
| Last Sale | $750,000 (Feb 1992) |
| Tax Bill | $1,582 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 170-270-087-1 |
| Primary APN | 170-270-087-1 |
|---|---|
| Alternative APN |
|
| Units | 2 Units |
|---|---|
| Stories | 1 Story |
| Building Area | 5,366 sqft Total Area |
| 1st Floor Area | 5,366 sqft |
| Year Built | Built 1942 |
|---|---|
| Lot Area | 57,064 sqft (1.3 acres) |
| Total Buildings | 3 Buildings |
| Account Number | 170-270-087-1 |
|---|---|
| Street Address | 1743 SUNNYVALE AVE |
| City | WALNUT CREEK |
| State | CA |
| Zip | 94597 |
| Property Category | Other |
| Property Type | Other > Religious, Church, Worship (Synagogue, Temple, Parsonage) |
| Legal Description | HOOK ESTATE SUBN #1 POR LOT 11 |
| Legal Subdivision | HOOK ESTATE SUBN #1 |
| Legal Lot Number | 11 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2008 |
| Census Tract | 340001 |
1743 Sunnyvale Ave is owned by a company that bought it in February 1992 and is owner-occupied.
Source: Contra Costa County records, as of September 29, 2025
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 1755 SUNNYVALE AVE, WALNUT CREEK, CA 94597-1809 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
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 Sale | Feb 6, 1992 · Amount on File |
| Deed Sale | Feb 6, 1992 · Amount on File |
| Deed Document Number | 17205910 |
| Record Updated | Jun 8, 2026 |
The 2025 property tax bill for 1743 Sunnyvale Ave was $1,582 with an additional exemption.
Source: Contra Costa County assessment roll, as of July 1, 2025
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Walnut Creek City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $1,582.00 Additional exemption filed | $778,054 Land $707,341 Building $70,713 |
| 2023 | $1,482.00 (-7.49%) Additional exemption filed | $747,843 Land $679,875 Building $67,968 |
| 2022 | $1,602.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1743 Sunnyvale Ave in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Claims | 2 (1998–2012) |
| Claims Outside the SFHA | 2 of 2 |
| Most Recent Claim | Nov 2012 · rainfall accumulation |
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.
Wildfire risk around 1743 Sunnyvale Ave is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 99.2% of California |
|---|---|
| Wildfire Likelihood | Under 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 486 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber · DSL · Fixed Wireless in parts of the area | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Sonic Telecom.
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