Contra Costa County property record for 5039 Blum Rd, Martinez, CA 94553
| Property Type | Federal Property (Exempt) |
|---|---|
| Lot Size | 4.53 acres (197,762 sqft) |
| Owner | Company Name on File |
| Tax Bill | $999 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-150-032-5 |
| Primary APN | 159-150-032-5 |
|---|---|
| Alternative APN |
|
| Lot Area | 197,762 sqft |
|---|
| Street Address | 5039 BLUM RD |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-4307 |
| Property Category | Public Works |
| Property Type | Public Works > Federal Property (Exempt) |
| Local Zoning Code | C |
| Legal Description | POR RO LAS JUNTAS EX 1/2 MR |
| Legal Subdivision | RO LAS JUNTAS |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1020 |
| Census Tract | 320004 |
Source: Contra Costa County records · APN 159-150-032-5
Assessment roll updated July 14, 2026 · Last verified July 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 File |
|---|---|
| Mailing Address | PO BOX 23440, OAKLAND, CA 94623-0440 |
| Owner Type | Company |
| Deed Names | Verified Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $340,587 (+2%) Land $340,587 | |
| 2025 | $999.00 (+12.5%) | $333,909 (+4.04%) Land $333,909 |
| 2023 | $888.00 (-68.58%) | $320,944 Land $320,944 |
| 2022 | $2,826.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), as of October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133200041, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 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 |
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
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: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: AT&T, Radiate Holdings.
Based on FCC filings for 87 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System, water system CA0710003, as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CONTRA COSTA WATER DISTRICT serves 210,500 people |
|---|---|
| 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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