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248 Grissom St, Hercules, CA 94547 Property Records

Contra Costa County property record for 248 Grissom St, Hercules, CA 94547

Property Summary

Property TypeSingle Family Home
Details5 bd · 3 ba · 2,598 sqft · built 1989
Lot Size0.161 acres (7,000 sqft)
Owner2 Trust Names on File
Last Sale$375,000 (Mar 2000)
Tax Bill$6,823 (2025)
Deeds & MortgagesNov 2023 Transfer
Flood ZoneZone X (minimal risk)
APN362-371-005-4

Property Details

APN / Parcel Number

Primary APN362-371-005-4
Alternative APN
  • 362-371-005

Interior

Bedrooms5 Beds
Full Baths3 Baths
Total Rooms11 Rooms
Stories2 Stories
Building Area2,598 sqft Living Area
1st Floor Area1,455 sqft
2nd Floor Area1,143 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1989
Effective Year BuiltEffective 1989
Architectural StyleContemporary
Exterior MaterialWood Siding
Roof MaterialWood Shingle
Lot Area7,000 sqft (0.161 acres)
Lot Dimensions105 ft deep x 75 ft wide
Garage TypeAttached
Garage Area709 sqft
Parking Spaces2 Parking Spaces

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemForced Air with A/C
Heating FuelGas
SewerMunicipal
Water SourceCommercial

Location & Zoning

Street Address248 GRISSOM ST
CityHERCULES
StateCA
Zip94547-1047
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal DescriptionT6722 L44
Legal SubdivisionSUBDIVISION 6722
Legal Tract6722
Legal Lot Number44
JurisdictionCONTRA COSTA CA
Township / Civil DivisionBRIONES
Census Block Group2
Census Block2001
Census Tract356002

Owner

248 Grissom St is owner-occupied and held in a trust since August 2023.

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

Owner of Record2 Trust Names on File
Mailing Address248 GRISSOM ST, HERCULES, CA 94547-1047
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust

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

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleMar 31, 2000 · Amount on File
Deed SaleMar 31, 2000 · Amount on File
Prior SaleAug 1, 1995 · Amount on File
Deed Document Number200064614
Last Transfer DateAug 13, 2023
Transfer Doc0000119343
Record UpdatedSep 20, 2026

November 2023: Intrafamily Transfer, Transfer

Document TypeIntrafamily Transfer
JurisdictionCONTRA COSTA CA
Recording DateNov 6, 2023
Property Address248 GRISSOM ST, HERCULES, CA 94547-1047
Document Number0000119343
Map ReferenceMB 326 PG 9
Instrument DateAug 18, 2023
Instrument2023-119343
Transaction TypeTransfer
Record UpdatedNov 15, 2023

Transaction

Tax$0.00
Amount AccuracyTransfer Tax Exempt
Additional
  • Intrafamily Transfer

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipFamily Trust
Address248 GRISSOM ST, HERCULES, CA 94547-1047

Tax Assessment & Valuation

The 2025 property tax bill for 248 Grissom St was $6,823 with a veteran's exemption.

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
MunicipalityHercules City
Unified School DistrictWest Contra Costa Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$587,872 (+2%) Land $137,945 Building $449,927
2025$6,823.00 Disabled Person's exemption Veteran's exemption$576,346 Land $135,241 Building $441,105
2023$6,498.00 (-0.35%) Disabled Person's exemption Veteran's exemption$553,968 Land $129,991 Building $423,977
2022$6,521.00

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

Flood

FEMA maps place 248 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 ZoneZone X
minimal risk
Nearest Special Flood Hazard AreaZone A, within 500 ft
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies1 in force
Nearby Flood Claims7 (1993–2017)
Claims Outside the SFHA2 of 7
Most Recent ClaimFeb 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 248 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 RiskHigh
above 74% of the US · above 50% of California
Wildfire Likelihood0.5% annual chance
ExposureIndirect
within ember reach
Adjoins Burnable LandYes

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 SystemEAST BAY MUD
serves 1,468,000 people · EPA ID CA0110005
Water SourceSurface water
Last State InspectionDec 2021
LeadUnder 1 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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

ProviderMax 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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