Contra Costa County property record for 4451 Blum Rd, Martinez, CA 94553
| Property Type | Federal Property (Exempt) |
|---|---|
| Lot Size | 48.3 acres (2,106,561 sqft) |
| Owner | Company Name on Record |
| Deeds & Mortgages | Dec 2022 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-140-042-7 |
| Primary APN | 159-140-042-7 |
|---|---|
| Alternative APN |
|
| Lot Area | 2,106,561 sqft |
|---|
| Street Address | 4451 BLUM RD |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-3653 |
| Property Category | Public Works |
| Property Type | Public Works > Federal Property (Exempt) |
| Local Zoning Code | HI |
| Legal Description | POR SEC 22 T2N R2W |
| Legal Range | 02W |
| Legal Township | 02N |
| Legal Section | 22 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 320004 |
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 | 5019 IMHOFF PL, MARTINEZ, CA 94553-4316 |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Oct 17, 2022 |
| Transfer Doc | 0000186198 |
| Record Updated | Sep 20, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Dec 20, 2022 |
| Property Address | 4451 BLUM RD, MARTINEZ, CA 94553-3653 |
| Document Number | 0000186198 |
| Instrument Date | Oct 17, 2022 |
| Instrument | 2022-186198 |
| Transaction Type | Transfer |
| Record Updated | Dec 29, 2022 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Investor | Possibly a Property Investor |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Assessed Value |
|---|---|
| 2026 | $2,325,527 (+6.12%) Land $2,325,527 |
| 2023 | $2,191,398 Land $2,191,398 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 4 in force |
| Nearby Flood Claims | 1 (2017) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jan 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 67% of the US · lower than 81% of California |
|---|---|
| Wildfire Likelihood | 0.04% 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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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.
Source: FCC Broadband Data Collection, based on 2 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Unwired Fixed Wireless | 300 / 25 |
| Starlink Satellite | 280 / 30 |
| AT&T DSL | 25 / 5 |
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