209 Grissom St, Hercules, CA 94547 Property Records

Contra Costa County property record for 209 Grissom St, Hercules, CA 94547

Property Summary

Property Type	Single Family Home
Details	4 bd · 2 ba · 2,224 sqft · built 1989
Lot Size	0.161 acres (7,000 sqft)
Owner	2 Trust Names on File
Tax Bill	$6,688 (2025)
Deeds & Mortgages	Aug 2026 Sale Dec 2019 Mortgage
Flood Zone	Zone X (minimal risk)
APN	`362-361-001-5`

Property Details

APN / Parcel Number

Primary APN	`362-361-001-5`
Alternative APN	`362-361-001`

Interior

Bedrooms	4 Beds
Full Baths	2 Baths
Total Rooms	9 Rooms
Stories	1 Story
Building Area	2,224 sqft Living Area
1st Floor Area	2,224 sqft

Exterior

Year Built	Built 1989
Effective Year Built	Effective 1992
Lot Area	7,000 sqft (0.161 acres)
Garage Type	Attached
Garage Area	603 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	209 GRISSOM ST
City	HERCULES
State	CA
Zip	94547-1048
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	T6722 L1
Legal Subdivision	SUBDIVISION 6722
Legal Tract	6722
Legal Lot Number	1
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	BRIONES
Census Block Group	2
Census Block	2000
Census Tract	356002

Owner

209 Grissom St is owner-occupied and held in a trust since July 2026.

Source: Contra Costa County records, as of August 25, 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	2 Trust Names on File
Mailing Address	209 GRISSOM ST, HERCULES, CA 94547-1048
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Aug 18, 2026	Grant Deed, Transfer NONE LISTED ON DOCUMENT
Dec 4, 2019	Intrafamily Transfer, Transfer · Conventional Mortgage MUFG UNION BANK NA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Transfer Date	Jul 30, 2026
Transfer Doc	0000086984
Record Updated	Oct 29, 2026

August 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Aug 18, 2026
Property Address	209 GRISSOM ST, HERCULES, CA 94547-1048
Document Number	0000086984
Instrument Date	Jul 30, 2026
Instrument	202686984
Transaction Type	Transfer
Record Updated	Aug 31, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length Multiple Parcels

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Trust
Address	209 GRISSOM ST, HERCULES, CA 94547-1048

December 2019: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Dec 4, 2019
Property Address	209 GRISSOM ST, HERCULES, CA 94547-1048
Document Number	0000217040
Map Reference	MB 326 PG 9
Instrument Date	Nov 25, 2019
Instrument	2019-217040
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	CHICAGO 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	209 GRISSOM ST, HERCULES, CA 94547-1048

Mortgage

Document Number	0000217041
Date	Dec 4, 2019
Instrument	2019-217041

Lender

Name	MUFG UNION BANK NA
Type	Bank

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	360 Months
Due	Dec 1, 2049

Interest

Rate Type	Adjustable Rate
Rate	4.75%
Type Change Date	Dec 1, 2024
Change Frequency	Annually
Min Rate At Change	2.75%
Max Rate At Change	6.75%
Index	1-Year LIBOR
Max Rate	10.7%

Tax Assessment & Valuation

The 2025 property tax bill for 209 Grissom St was $6,688 with a homeowner's exemption.

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		$425,959 (+2%) Land $114,828 Building $311,131
2025	$6,688.00 Homeowner's exemption	$417,608 Land $112,577 Building $305,031
2023	$6,272.00 (+1.19%) Homeowner's exemption	$401,393 Land $108,206 Building $293,187
2022	$6,198.00

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

Flood

FEMA maps place 209 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 209 Grissom St is high, ranking above 73% of the US, with a 0.4% annual chance of 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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