Contra Costa County property record for 307 Oneil Cir, Hercules, CA 94547
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,591 sqft · built 1988 |
| Lot Size | 0.08 acres (3,465 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $400,000 (Mar 2014) |
| Tax Bill | $8,727 (2025) |
| Deeds & Mortgages | Nov 2025 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 404-351-081-9 |
| Primary APN | 404-351-081-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,591 sqft Living Area |
| 1st Floor Area | 858 sqft |
| 2nd Floor Area | 733 sqft |
| Year Built | Built 1988 |
|---|---|
| Effective Year Built | Effective 1988 |
| Architectural Style | Cluster |
| Lot Area | 3,465 sqft (0.08 acres) |
| Garage Type | Attached |
| Garage Area | 420 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Central |
|---|
| Street Address | 307 ONEIL CIR |
|---|---|
| City | HERCULES |
| State | CA |
| Zip | 94547-3751 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T6773 L81 |
| Legal Subdivision | 6773 BAYSIDE VILLAGE PH 4 |
| Legal Tract | 6773 |
| Legal Lot Number | 81 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | WEST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2028 |
| Census Tract | 359105 |
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 Company Names on Record |
|---|---|
| Mailing Address | 307 ONEIL CIR, HERCULES, CA 94547-3751 |
| Owner Type | Company |
| Vesting | Life Tenant |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Mar 24, 2014 · Amount on Record |
| Deed Sale | Mar 24, 2014 · Amount on Record |
| Prior Sale | Oct 16, 1996 · Amount on Record |
| Deed Document Number | 201443584 |
| Prior Transfer Date | Apr 15, 1999 |
| Prior Transfer Doc | 0000108139 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 17, 2025 |
| Property Address | 307 ONEIL CIR, HERCULES, CA 94547-3751 |
| Document Number | 0000129223 |
| Map Reference | MB 312 PG 22 |
| Instrument Date | Nov 13, 2025 |
| Instrument | 2025- 129223 |
| Transaction Type | Transfer |
| Record Updated | Dec 9, 2025 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | No Consideration Stated |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 307 ONEIL CIR, HERCULES, CA 94547-3751 |
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 | $500,141 (+2%) Land $187,551 Building $312,590 | |
| 2025 | $8,727.00 (+11.93%) Homeowner's exemption | $490,335 (+4.04%) Land $183,874 Building $306,461 |
| 2023 | $7,797.00 (-6.11%) Homeowner's exemption | $471,296 Land $176,735 Building $294,561 |
| 2022 | $8,304.00 |
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 | 5 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 | Low lower than 80% of the US · lower than 88% of California |
|---|---|
| Wildfire Likelihood | 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 | 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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