Contra Costa County property record for 521 Isabel Dr, Martinez, CA 94553 · Last verified July 2026
| Property Type | Residential > Single Family > Home |
|---|---|
| Bedrooms | 5 Beds |
| Bathrooms | 2.5 Baths |
| Year Built | Built 1997 |
| Square Footage | 2,308 sqft Living Area |
| Lot Size | 7,000 sqft (0.161 acres) |
| Occupancy | Owner Occupied |
| Last Sale | $930,000 (2019) |
| Tax Bill | $12,501.00 (2025) |
| Primary APN | 155-450-025-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 5 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Partial Baths | 1 Partial Baths |
| Total Rooms | 10 Rooms |
| Building Area | 2,308 sqft Living Area |
| Gross Area | 2,791 sqft Gross Area |
| 1st Floor | 1,132 sqft 1st Floor |
| 2nd Floor | 1,176 sqft 2nd Floor |
| Stories | 2 Stories |
| Year Built | Built 1986 |
|---|---|
| Effective Year Built | Effective 1997 |
| Lot Area | 7,000 sqft (0.161 acres) |
| Parking Spaces | 2 Parking Spaces |
| Garage Type | Attached Garage |
| Garage Area | 483 sqft Garage |
| Heating System | Central Heating |
|---|
| Street Address | 521 ISABEL DR |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-6617 |
| Property Usage | Residential Property Usage |
| Type | Residential > Single Family > Home |
| Legal Description | T05127 L0074 B |
| Legal Subdivision | SUBDIVISION 5127 |
| Legal Tract | 05127 |
| Legal Lot Number | 74 |
| Jurisdiction | CONTRA COSTA CA |
| Minor Civil Division | CENTRAL CONTRA COSTA |
| Census Blockgroup | 2 |
| Census Block | 2001 |
| Census Tract | 321102 |
Source: Contra Costa County records · APN 155-450-025-4
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 Individual Names on File |
|---|---|
| Mailing Address | 521 ISABEL DR, MARTINEZ, CA 94553-6617 |
| Occupancy | Owner Occupied |
| Owner Type | Owner is an Individual, Couple or Unincorporated Entity |
| Vesting | Community Property |
| Date | Document |
|---|---|
| May 20, 2020 | Deed of Trust, Mortgage · Conventional Mortgage GUARANTEED RATE |
| Mar 08, 2019 | Grant Deed, Transfer · Conventional Mortgage GUARANTEED RATE INC |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Mar 08, 2019 · Amount on Record |
| Deed Sale | Mar 08, 2019 · Amount on Record |
| Prior Sale | Mar 21, 2000 · Amount on Record |
| Deed Doc Number | 201931819 |
| Record Refreshed | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 521 ISABEL DR, MARTINEZ, CA 94553-6617 |
| Document Number | 0000099787 |
| Instrument Date | May 20, 2020 |
| Transaction Type | Mortgage |
| Record Updated | Jun 03, 2020 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY TITLE |
| Name | Verified Name |
|---|---|
| Relationship | Community Property |
| Address | 521 ISABEL DR MARTINEZ CA 945536617, MARTINEZ, CA 94553-6617 |
| Document Number | 0000099787 |
|---|---|
| Date | May 27, 2020 |
| Instrument | 99787 |
| Name | GUARANTEED RATE |
|---|---|
| Address | CHICAGO, IL 60613 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | May 26, 2050 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Mar 08, 2019 |
| Property Address | 521 ISABEL DR, MARTINEZ, CA 94553-6617 |
| Document Number | 0000031819 |
| Map Reference | MB 230 PG 44 |
| Instrument Date | Feb 26, 2019 |
| Instrument | 2019-031819 |
| Transaction Type | Transfer |
| Record Updated | Nov 03, 2022 |
| Title Company | PLACER TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded Values by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property (Marital Community) with Rights of Survivorship |
| Address | 521 ISABEL DR, MARTINEZ, CA 94553-6617 |
| Document Number | 0000031820 |
|---|---|
| Date | Mar 08, 2019 |
| Instrument | 2019-031820 |
| Name | GUARANTEED RATE INC |
|---|---|
| Type | Non-Lending Institution |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Apr 01, 2049 |
| Document Number | 0000031821 |
|---|---|
| Date | Mar 08, 2019 |
| Instrument | 2019-031821 |
| Name | TCF NATIONAL BANK |
|---|---|
| Type | Bank |
| Address | SIOUX FALLS, SD 57106 |
| Type | Line of Credit |
|---|---|
| Amount | Amount Recorded |
| Term | 360 Months |
| Due | Mar 23, 2049 |
| Rate Type | Adjustable Rate |
|---|---|
| Change Frequency | Monthly (Revolving credit lines are monthly unless stated otherwise). |
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 | $1,058,176 (+2%) Land $477,885 Building $580,291 | |
| 2025 | $12,501.00 (+4.03%) Homeowner's exemption | $1,037,428 (+4.04%) Land $468,515 Building $568,913 |
| 2023 | $12,017.00 (+0.86%) Homeowner's exemption | $997,145 Land $450,323 Building $546,822 |
| 2022 | $11,915.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Special Flood Hazard Area | No |
| 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; lenders make the official flood determination.
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