Contra Costa County property record for 417 Isabel Dr, Martinez, CA 94553 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2.5 ba · 2,308 sqft · built 1988 |
| Lot Size | 0.156 acres (6,800 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $351,000 (Dec 1998) |
| Tax Bill | $7,471 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 155-450-040-3 |
| Primary APN | 155-450-040-3 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 2 Stories |
| Building Area | 2,308 sqft Living Area |
| 1st Floor Area | 1,132 sqft |
| 2nd Floor Area | 1,176 sqft |
| Year Built | Built 1988 |
|---|---|
| Effective Year Built | Effective 1988 |
| Lot Area | 6,800 sqft (0.156 acres) |
| Garage Type | Attached |
| Garage Area | 483 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 417 ISABEL DR |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-6614 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T05127 L0089 B |
| Legal Tract | 05127 |
| Legal Lot Number | 89 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2001 |
| Census Tract | 321102 |
Source: Contra Costa County records · APN 155-450-040-3
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 | 2 Company Names on File |
|---|---|
| Mailing Address | 417 ISABEL DR, MARTINEZ, CA 94553-6614 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Dec 17, 1998 · Amount on Record |
| Deed Sale | Dec 17, 1998 · Amount on Record |
| Prior Sale | Sep 18, 1995 · Amount on Record |
| Deed Document Number | 1998317212 |
| Last Transfer Date | Oct 09, 2014 |
| Transfer Doc | 0000058880 |
| 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 |
| Municipality | Martinez City |
| 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 | $600,062 (+2%) Land $199,873 Building $400,189 | |
| 2025 | $7,471.00 (+4.18%) Homeowner's exemption | $588,297 (+4.04%) Land $195,954 Building $392,343 |
| 2023 | $7,171.00 (+0.86%) Homeowner's exemption | $565,454 Land $188,346 Building $377,108 |
| 2022 | $7,110.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133211022, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Community Rating System | Class 9 (5% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 3 (1983–2018) |
| Claims Outside the SFHA | 2 of 3 |
| Most Recent Claim | Nov 2018, rainfall accumulation |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| 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, availability as of December 31, 2025 · Published October 2026 · based on 368 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| Unwired | Fixed Wireless | 300 / 25 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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