Contra Costa County property record for 240 Explorer Way, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,271 sqft · built 2004 |
| Lot Size | 0.177 acres (7,725 sqft) |
| Owner | Company Name on File |
| Last Sale | $706,500 (May 2005) |
| Tax Bill | $13,267 (2025) |
| Deeds & Mortgages | May 2021 Mortgage Sep 2022 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-170-041-2 |
| Primary APN | 159-170-041-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 9 Rooms |
| Stories | 2 Stories |
| Building Area | 2,271 sqft Living Area |
| 1st Floor Area | 1,061 sqft |
| 2nd Floor Area | 1,210 sqft |
| Year Built | Built 2004 |
|---|---|
| Effective Year Built | Effective 2005 |
| Lot Area | 7,725 sqft (0.177 acres) |
| Garage Type | Attached |
| Garage Area | 486 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 240 EXPLORER WAY |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-3604 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R7 |
| Legal Description | T8738 L6 |
| Legal Subdivision | SUBDIVISION 8738 |
| Legal Tract | 8738 |
| Legal Lot Number | 6 |
| 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 · APN 159-170-041-2
Assessment roll updated July 14, 2026 · Last verified August 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 | 240 EXPLORER WAY, MARTINEZ, CA 94553-3604 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Date | Document |
|---|---|
| May 25, 2021 | Deed of Trust, Mortgage · Conventional Mortgage CATALYST MORTGAGE |
| Sep 30, 2022 | Intrafamily Transfer, Transfer |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | May 03, 2005 · Amount on Record |
| Deed Sale | May 03, 2005 · Amount on Record |
| Deed Document Number | 2005156254 |
| Last Transfer Date | Sep 29, 2022 |
| Transfer Doc | 0000148420 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 240 EXPLORER WAY, MARTINEZ, CA 94553-3604 |
| Transaction Type | Mortgage |
| Record Updated | Nov 03, 2022 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|---|
| Address | 240 EXPLORER WAY, MARTINEZ, CA 94553-3604 |
| Document Number | 0000154392 |
|---|---|
| Date | May 25, 2021 |
| Instrument | 2021-154392 |
| Name | CATALYST MORTGAGE |
|---|---|
| Type | Mortgage Company |
| Address | ROSEVILLE, CA 95661 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 181 Months |
| Due | Jun 01, 2036 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Sep 30, 2022 |
| Property Address | 240 EXPLORER WAY, MARTINEZ, CA 94553-3604 |
| Document Number | 0000148420 |
| Map Reference | MB 464 PG 11 |
| Instrument Date | Sep 29, 2022 |
| Instrument | 2022-148420 |
| Transaction Type | Transfer |
| Record Updated | Jun 07, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Family Trust |
| Address | 240 EXPLORER WAY, MARTINEZ, CA 94553-3604 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified August 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Martinez 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 | $1,044,906 (+2%) Land $405,200 Building $639,706 | |
| 2025 | $13,267.00 (+6.86%) Homeowner's exemption | $1,024,418 (+4.04%) Land $397,255 Building $627,163 |
| 2023 | $12,415.00 (+2.36%) Homeowner's exemption | $984,640 Land $381,830 Building $602,810 |
| 2022 | $12,129.00 |
Source: FEMA National Flood Hazard Layer as of October 12, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · 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 | 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 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 |
| Radiate Holdings Fiber · Cable in parts of the area | 1,500 / 1,500 |
| Unwired Fixed Wireless | 300 / 25 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
May also be available: AT&T, Verizon.
Based on FCC filings for 244 locations within half a mile of this property.
5G (outdoors only) and 4G LTE
Source: EPA Safe Drinking Water Information System 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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