266 Grissom St, Hercules, CA 94547 Property Records

Contra Costa County property record for 266 Grissom St, Hercules, CA 94547

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 2,519 sqft · built 1989
Lot Size	0.161 acres (7,000 sqft)
Owner	Individual Name on File
Last Sale	$385,000 (Sep 2010)
Tax Bill	$8,188 (2025)
Deeds & Mortgages	Apr 2024 Mortgage Jan 2024 Transfer
Flood Zone	Zone X (minimal risk)
APN	`362-371-002-1`

Property Details

APN / Parcel Number

Primary APN	`362-371-002-1`
Alternative APN	`362-371-002`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	2,519 sqft Living Area
1st Floor Area	1,416 sqft
2nd Floor Area	1,103 sqft

Exterior

Year Built	Built 1989
Effective Year Built	Effective 1989
Lot Area	7,000 sqft (0.161 acres)
Garage Type	Attached
Garage Area	708 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Heating System	Central

Location & Zoning

Street Address	266 GRISSOM ST
City	HERCULES
State	CA
Zip	94547-1047
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	A-2
Legal Description	T6722 L41
Legal Subdivision	SUBDIVISION 6722
Legal Tract	6722
Legal Lot Number	41
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	BRIONES
Census Block Group	2
Census Block	2001
Census Tract	356002

Owner

266 Grissom St is owned and occupied by an individual who acquired it in April 2024.

Source: Contra Costa County records, as of July 14, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Individual Name on File
Mailing Address	266 GRISSOM ST, HERCULES, CA 94547-1047
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Date	Document
Apr 10, 2024	Intrafamily Transfer, Transfer · Conventional Mortgage HOMEPLUS CORP
Jan 31, 2024	Intrafamily Transfer, Transfer

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Sep 17, 2010 · Amount on File
Deed Sale	Sep 17, 2010 · Amount on File
Prior Sale	May 30, 2003 · Amount on File
Deed Document Number	2010197693
Last Transfer Date	Apr 4, 2024
Transfer Doc	0000032914
Record Updated	Sep 20, 2026

April 2024: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Apr 10, 2024
Property Address	266 GRISSOM ST, HERCULES, CA 94547-1047
Document Number	0000032914
Map Reference	MB 326 PG 9
Instrument Date	Apr 4, 2024
Instrument	2024-032914
Transaction Type	Transfer
Record Updated	Apr 19, 2024
Title Company	OLD REPUBLIC TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	266 GRISSOM ST, HERCULES, CA 94547-1047

Mortgage

Document Number	0000032915
Date	Apr 10, 2024
Instrument	2024-032915

Lender

Name	HOMEPLUS CORP
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	May 1, 2054

January 2024: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Jan 31, 2024
Property Address	266 GRISSOM ST, HERCULES, CA 94547-1047
Document Number	0000009701
Map Reference	MB 326 PG 9
Instrument Date	Jan 27, 2024
Instrument	2024-009701
Transaction Type	Transfer
Record Updated	Feb 12, 2024

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	266 GRISSOM ST, HERCULES, CA 94547-1047

Tax Assessment & Valuation

The 2025 property tax bill for 266 Grissom St was $8,188.

Source: Contra Costa County assessment roll, as of July 14, 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

Year	Tax Bill	Assessed Value
2026		$503,104 (+2%) Land $182,945 Building $320,159
2025	$8,188.00	$493,240 Land $179,358 Building $313,882
2023	$7,629.00 (+1.19%) Homeowner's exemption	$474,090 Land $172,395 Building $301,695
2022	$7,539.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

FEMA maps place 266 Grissom St 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 A, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	1 in force
Nearby Flood Claims	7 (1993–2017)
Claims Outside the SFHA	2 of 7
Most Recent Claim	Feb 2017 · Severe Winter Storms, Flooding, And Mudslides

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

Wildfire risk around 266 Grissom St is high, ranking above 74% of the US, with a 0.5% annual chance of wildfire.

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	High above 74% of the US · above 50% of California
Wildfire Likelihood	0.5% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

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

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, 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.

Internet Providers

Source: FCC Broadband Data Collection, based on 216 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
T-Mobile Fixed Wireless	100 / 20

May also be available: Unwired.

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