Contra Costa County property record for 4520 Blum Rd, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 3,417 sqft · built 1947 |
| Lot Size | 0.25 acres (10,890 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $385,000 (Jun 2016) |
| Tax Bill | $7,435 (2025) |
| Deeds & Mortgages | Feb 2022 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-170-002-4 |
| Primary APN | 159-170-002-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 9 Rooms |
| Stories | 1 Story |
| Building Area | 3,417 sqft Living Area |
| Gross Area | 2,036 sqft |
| 1st Floor Area | 2,036 sqft |
| Year Built | Built 1947 |
|---|---|
| Effective Year Built | Effective 1960 |
| Lot Area | 10,890 sqft (0.25 acres) |
| Lot Dimensions | 150 ft deep x 75 ft wide |
| Garage Type | Attached |
| Garage Area | 318 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Floor/Wall Furnace |
|---|
| Street Address | 4520 BLUM RD |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-3600 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R7 |
| Legal Description | POR RO LAS JUNTAS |
| Legal Subdivision | RANCHO LAS JUNTAS |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1003 |
| 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 Company Names on Record |
|---|---|
| Mailing Address | 1901 GILLY LN, CONCORD, CA 94518-3217 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 28, 2016 · Amount on Record |
| Deed Sale | Jun 28, 2016 · Amount on Record |
| Deed Document Number | 2016126619 |
| Prior Transfer Date | Oct 21, 1993 |
| Prior Transfer Doc | 0000304758 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 4520 BLUM RD, MARTINEZ, CA 94553-3600 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | SOLIDIFI TITLE & CLOSING |
| Name | Verified Name |
|---|---|
| Address | 1901 GILLY LN, CONCORD, CA 94518-3217 |
| Document Number | 0000031147 |
|---|---|
| Date | Feb 18, 2022 |
| Instrument | 2022-031147 |
| Name | FARMERS BANK & TRUST |
|---|---|
| Type | Bank |
| Address | GREAT BEND, KS 67530 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Mar 1, 2052 |
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 | $464,869 (+2%) Land $241,491 Building $223,378 | |
| 2025 | $7,435.00 (+7.91%) | $455,755 (+4.04%) Land $236,756 Building $218,999 |
| 2023 | $6,890.00 (+3.53%) | $438,059 Land $227,563 Building $210,496 |
| 2022 | $6,655.00 |
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 99.1% of the US · lower than 99.2% 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.
5G (outdoors only) and 4G LTE
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