Contra Costa County property record for 4650 Blum Rd, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 1,228 sqft · built 1940 |
| Lot Size | 0.34 acres (14,810 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $179,500 (Sep 1994) |
| Tax Bill | $4,557 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-180-024-6 |
| Primary APN | 159-180-024-6 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 5 Rooms |
| Stories | 2 Stories |
| Building Area | 1,228 sqft Living Area |
| 1st Floor Area | 832 sqft |
| 2nd Floor Area | 396 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1940 |
|---|---|
| Effective Year Built | Effective 1970 |
| Architectural Style | Bungalow |
| Exterior Material | Wood Siding |
| Roof Material | Other |
| Lot Area | 14,810 sqft (0.34 acres) |
| Lot Dimensions | 208 ft deep x 70 ft wide |
| Garage Type | Attached |
| Garage Area | 528 sqft |
| Parking Spaces | 2 Parking Spaces |
| Heating System | Forced Air with A/C |
|---|---|
| Heating Fuel | Gas |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 4650 BLUM RD |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-3612 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R7 |
| Legal Description | RECORD OF SURVEY 23 PG 18 PCL 1 |
| Legal Subdivision | LAS JUNTAS RHO |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1010 |
| 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 | 2 Individual Names on Record |
|---|---|
| Mailing Address | PO BOX 6102, CONCORD, CA 94524-1102 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Sep 30, 1994 · Amount on Record |
| Deed Sale | Sep 30, 1994 · Amount on Record |
| Deed Document Number | 1994245257 |
| Last Transfer Date | Apr 27, 1998 |
| Transfer Doc | 0000098189 |
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Martinez Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $307,484 (+2%) Land $154,169 Building $153,315 | |
| 2025 | $4,557.00 (+7.63%) Homeowner's exemption | $301,456 (+4.04%) Land $151,147 Building $150,309 |
| 2023 | $4,234.00 (+3.22%) Homeowner's exemption | $289,752 Land $145,279 Building $144,473 |
| 2022 | $4,102.00 |
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 97% of the US · lower than 97.8% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
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 244 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Fiber · Cable in parts of the area | 1,500 / 1,500 |
| Unwired Fixed Wireless | 300 / 25 |
| T-Mobile Fixed Wireless | 100 / 20 |
May also be available: AT&T, Verizon.
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