191 Grissom Ct, Hercules, CA 94547 Property Records

Contra Costa County property record for 191 Grissom Ct, Hercules, CA 94547

Property Summary

Property Type	Single Family Home
Details	5 bd · 3 ba · 2,675 sqft · built 1989
Lot Size	0.253 acres (11,000 sqft)
Owner	Company Name on Record
Tax Bill	$9,423 (2025)
Deeds & Mortgages	Dec 2017 Transfer
Flood Zone	Zone X (minimal risk)
APN	`362-301-009-1`

Property Details

APN / Parcel Number

Primary APN	`362-301-009-1`
Alternative APN	`362-301-009`

Interior

Bedrooms	5 Beds
Full Baths	3 Baths
Total Rooms	11 Rooms
Stories	2 Stories
Building Area	2,675 sqft Living Area
1st Floor Area	1,435 sqft
2nd Floor Area	1,240 sqft

Exterior

Year Built	Built 1989
Effective Year Built	Effective 1991
Lot Area	11,000 sqft (0.253 acres)
Garage Type	Attached
Garage Area	630 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	191 GRISSOM CT
City	HERCULES
State	CA
Zip	94547-1046
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T6774 L9
Legal Subdivision	SUBDIVISION 6774
Legal Tract	6774
Legal Lot Number	9
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	BRIONES
Census Block Group	2
Census Block	2006
Census Tract	356002

Owner

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	Company Name on Record
Mailing Address	191 GRISSOM CT, HERCULES, CA 94547-1046
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Transfer Date	Nov 18, 2017
Transfer Doc	0000227518
Record Updated	Sep 20, 2026

December 2017: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Dec 5, 2017
Property Address	191 GRISSOM CT, HERCULES, CA 94547-1046
Document Number	0000227518
Instrument Date	Nov 18, 2017
Instrument	227518
Transaction Type	Transfer
Record Updated	Dec 11, 2017
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	191 GRISSOM CT HERCULES CA 945471046, HERCULES, CA 94547-1046

Tax Assessment & Valuation

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		$643,158 (+2%) Land $153,877 Building $489,281
2025	$9,423.00 (+1%) Homeowner's exemption	$630,548 (+4.04%) Land $150,860 Building $479,688
2023	$9,330.00 (+1.17%) Homeowner's exemption	$606,064 Land $145,002 Building $461,062
2022	$9,222.00

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

Flood

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

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

Wildfire Risk	High above 73% of the US · above 49% of California
Wildfire Likelihood	0.4% annual chance
Exposure	Direct burnable vegetation

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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