Contra Costa County property record for 1187 Williams, Hercules, CA 94547
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,764 sqft · built 1986 |
| Lot Size | 0.138 acres (6,000 sqft) |
| Owner | Company Name on File |
| Tax Bill | $5,500 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 404-071-017-2 |
| Primary APN | 404-071-017-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 1,764 sqft Living Area |
| 1st Floor Area | 1,764 sqft |
| Year Built | Built 1986 |
|---|---|
| Effective Year Built | Effective 1987 |
| Architectural Style | Cluster |
| Lot Area | 6,000 sqft (0.138 acres) |
| Garage Type | Attached |
| Garage Area | 431 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 1187 WILLIAMS |
|---|---|
| City | HERCULES |
| State | CA |
| Zip | 94547-3733 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R1 |
| Legal Description | T5337A L0017 B |
| Legal Tract | 5337A |
| Legal Lot Number | 0017 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | WEST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2029 |
| Census Tract | 359105 |
Source: Contra Costa County records · APN 404-071-017-2
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 1187 WILLIAMS, HERCULES, CA 94547-3733 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Transfer Date | May 19, 2016 |
| Transfer Doc | 0000097149 |
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Hercules City |
| Unified School District | West Contra Costa Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $311,611 (+2%) Land $69,676 Building $241,935 | |
| 2025 | $5,500.00 (+7.17%) Homeowner's exemption | $305,502 (+4.04%) Land $68,310 Building $237,192 |
| 2023 | $5,132.00 (+1.3%) Homeowner's exemption | $293,641 Land $65,658 Building $227,983 |
| 2022 | $5,066.00 |
Source: FEMA National Flood Hazard Layer as of October 12, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 5 in force |
| 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 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: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: Sonic Telecom, Unwired.
Based on FCC filings for 505 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | EAST BAY MUD serves 1,468,000 people |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| Lead | Under 1 ppb (2022–2024) 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. This system sells water to local utilities; the supplier billing this address may be one of them. The full violation and enforcement history is in the system's EPA record.
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