Contra Costa County property record for 121 Bay St, Hercules, CA 94547
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 1.5 ba · 1,413 sqft · built 1900 |
| Lot Size | 0.108 acres (4,692 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $612,000 (Jun 2005) |
| Tax Bill | $10,876 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 404-170-017-2 |
| Primary APN | 404-170-017-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 8 Rooms |
| Stories | 2 Stories |
| Building Area | 1,413 sqft Living Area |
| 1st Floor Area | 841 sqft |
| 2nd Floor Area | 572 sqft |
| Year Built | Built 1900 |
|---|---|
| Effective Year Built | Effective 1985 |
| Lot Area | 4,692 sqft (0.108 acres) |
| Garage Type | Attached |
| Garage Area | 299 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Central |
|---|
| Street Address | 121 BAY ST |
|---|---|
| City | HERCULES |
| State | CA |
| Zip | 94547-3718 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | H |
| Legal Description | T06102 L0017 B |
| Legal Tract | 06102 |
| Legal Lot Number | 17 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | WEST CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 359105 |
Source: NPS National Register of Historic Places, as of August 1, 2026
| Historic District | Within the Hercules Village listed 1980 · 40 contributing resources · NRIS 80000799 |
|---|
Federal listing alone does not restrict alterations; local historic district rules, which this data does not cover, may apply.
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 121 BAY ST, HERCULES, CA 94547-3718 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 28, 2005 · Amount on Record |
| Deed Sale | Jun 28, 2005 · Amount on Record |
| Prior Sale | Aug 14, 2002 · Amount on Record |
| Deed Document Number | 2005234753 |
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Hercules City |
| Unified School District | West Contra Costa Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $709,000 (-1.12%) Land $417,059 Building $291,941 | |
| 2025 | $10,876.00 (+8.46%) Homeowner's exemption | $717,000 (+7.17%) Land $421,766 Building $295,234 |
| 2023 | $10,028.00 (-7.58%) Homeowner's exemption | $669,000 Land $394,000 Building $275,000 |
| 2022 | $10,851.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 Policies | 1 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 | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| 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, 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.
Source: FCC Broadband Data Collection, based on 505 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T Fixed Wireless · DSL | 100 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: Sonic Telecom, Unwired.
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