277 Oneil Cir, Hercules, CA 94547 Property Records

Contra Costa County property record for 277 Oneil Cir, Hercules, CA 94547

Property Summary

Property Type	Townhouse
Details	2 bd · 2 ba · 1,064 sqft · built 1988
Lot Size	0.06 acres (2,600 sqft)
Owner	2 Individual Names on File
Last Sale	$575,000 (May 2025)
Tax Bill	$5,028 (2025)
Deeds & Mortgages	Mar 2022 Sale
Flood Zone	Zone X (minimal risk)
APN	`404-351-083-5`

Property Details

APN / Parcel Number

Primary APN	`404-351-083-5`
Alternative APN	`404-351-083`

Interior

Bedrooms	2 Beds
Full Baths	2 Baths
Total Rooms	4 Rooms
Stories	1 Story
Building Area	1,064 sqft Living Area
1st Floor Area	1,064 sqft

Exterior

Year Built	Built 1988
Effective Year Built	Effective 1988
Architectural Style	Townhouse
Lot Area	2,600 sqft (0.06 acres)
Garage Type	Attached
Garage Area	254 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	277 ONEIL CIR
City	HERCULES
State	CA
Zip	94547-3746
Property Category	Residential
Property Type	Residential > Condominium / Townhouse > Townhouse
Legal Description	T6773 L83
Legal Subdivision	1 MARTINEZ CENTER
Legal Tract	6773
Legal Lot Number	83
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	WEST CONTRA COSTA
Census Block Group	2
Census Block	2028
Census Tract	359105

Owner

Source: Contra Costa County records · APN 404-351-083-5

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	2 Individual Names on File
Mailing Address	277 ONEIL CIR, HERCULES, CA 94547-3746
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	May 22, 2025 · Amount on Record
Deed Sale	May 22, 2025 · Amount on Record
Prior Sale	Apr 07, 2011 · Amount on Record
Deed Document Number	202551070
Prior Transfer Date	Mar 05, 2013
Prior Transfer Doc	0000066010
Record Updated	Sep 20, 2026

March 2022: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Mar 25, 2022
Property Address	277 ONEIL CIR, HERCULES, CA 94547-3746
Document Number	0000053076
Map Reference	MB 30 PG 50&51
Instrument Date	Jan 20, 2022
Instrument	2022-053076
Transaction Type	Transfer
Record Updated	Nov 03, 2022
Title Company	SERVICELINK TITLE COMPANY D, SERVICELINK TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Notice of Trustee Sale Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	B THE GREEN #B # B, B, DOVER, DE 19901
Investor	Possibly a Property Investor

Tax Assessment & Valuation

Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Hercules City
Unified School District	West Contra Costa Unified School District (KG - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Year	Tax Bill	Assessed Value
2026		$586,500 (+123.32%) Land $306,000 Building $280,500
2025	$5,028.00 (+7.28%)	$262,626 (+4.04%) Land $115,940 Building $146,686
2023	$4,687.00 (+1.21%)	$252,430 Land $111,439 Building $140,991
2022	$4,631.00

Flood & Wildfire

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

Flood

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

Wildfire

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.

Internet Providers

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.

Drinking Water

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

Violations Reported to EPA

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.