Contra Costa County property record for 227 Grissom St, Hercules, CA 94547
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 2,224 sqft · built 1989 |
| Lot Size | 0.161 acres (7,000 sqft) |
| Owner | Trust Name on File |
| Last Sale | $555,000 (Oct 2003) |
| Tax Bill | $12,405 (2025) |
| Deeds & Mortgages | Oct 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 362-361-004-9 |
| Primary APN | 362-361-004-9 |
|---|---|
| Alternative APN |
|
| 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 |
| Year Built | Built 1989 |
|---|---|
| Effective Year Built | Effective 1989 |
| Lot Area | 7,000 sqft (0.161 acres) |
| Garage Type | Attached |
| Garage Area | 603 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 227 GRISSOM ST |
|---|---|
| City | HERCULES |
| State | CA |
| Zip | 94547-1048 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | A-2 |
| Legal Description | T6722 L4 |
| Legal Subdivision | SUBDIVISION #6722 |
| Legal Tract | 6722 |
| Legal Lot Number | 4 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | BRIONES |
| Census Block Group | 2 |
| Census Block | 2000 |
| Census Tract | 356002 |
227 Grissom St is owner-occupied and held in a trust since April 2014.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Trust Name on File |
|---|---|
| Mailing Address | 227 GRISSOM ST, HERCULES, CA 94547-1048 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Oct 3, 2003 · Amount on File |
| Deed Sale | Oct 3, 2003 · Amount on File |
| Deed Document Number | 2003495468 |
| Last Transfer Date | Apr 4, 2014 |
| Transfer Doc | 0000057985 |
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 227 GRISSOM ST, HERCULES, CA 94547-1048 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATIONAL TTL COMPAN |
| Name | Verified Name |
|---|---|
| Address | 227 GRISSOM ST, HERCULES, CA 94547-1048 |
| Document Number | 0000257962 |
|---|---|
| Date | Oct 30, 2020 |
| Instrument | 2020-257962 |
| Name | SUMMIT FUNDING INC |
|---|---|
| Type | Mortgage Company |
| Address | SACRAMENTO, CA 95815 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 361 Months |
| Due | Nov 1, 2050 |
The 2025 property tax bill for 227 Grissom St was $12,405 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Hercules City |
| Unified School District | West Contra Costa Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $846,811 (+2%) Land $290,034 Building $556,777 | |
| 2025 | $12,405.00 Homeowner's exemption | $830,208 Land $284,348 Building $545,860 |
| 2023 | $11,754.00 (+1.14%) Homeowner's exemption | $797,971 Land $273,307 Building $524,664 |
| 2022 | $11,621.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 227 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 risk around 227 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.
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 |
| 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.
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.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures