Contra Costa County property record for 525 Webster Dr, Martinez, CA 94553
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 2 ba · 1,430 sqft · built 1972 |
| Lot Size | 0.215 acres (9,350 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $860,000 (Nov 2021) |
| Tax Bill | $11,187 (2025) |
| Deeds & Mortgages | Jun 2021 Reverse Mortgage Nov 2021 Sale & Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 164-294-012-4 |
| Primary APN | 164-294-012-4 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 8 Rooms |
| Stories | 1 Story |
| Building Area | 1,430 sqft Living Area |
| Gross Area | 1,920 sqft |
| 1st Floor Area | 1,430 sqft |
| Fireplaces | 1 Fireplace |
| Fireplace | Fireplace |
| Year Built | Built 1972 |
|---|---|
| Effective Year Built | Effective 1974 |
| Exterior Material | Stucco |
| Roof Material | Wood Shingle |
| Lot Area | 9,350 sqft (0.215 acres) |
| Garage Type | Attached |
| Garage Area | 490 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|---|
| Heating System | Forced Air with A/C |
| Sewer | Municipal |
| Water Source | Commercial |
| Street Address | 525 WEBSTER DR |
|---|---|
| City | MARTINEZ |
| State | CA |
| Zip | 94553-6041 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R10 |
| Legal Description | TRACT 3469 LOT 38 EX MR |
| Legal Subdivision | SUBDIVISION 3469 |
| Legal Tract | 3469 |
| Legal Lot Number | 38 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 321103 |
Source: Contra Costa County records · APN 164-294-012-4
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 | 525 WEBSTER DR, MARTINEZ, CA 94553-6041 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Date | Document |
|---|---|
| Jun 07, 2021 | Deed of Trust, Mortgage · Reverse Mortgage AMERICAN ADVISORS GROUP |
| Nov 23, 2021 | Grant Deed, Transfer · Conventional Mortgage ROCKET MORTGAGE LLC |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Nov 23, 2021 · Amount on Record |
| Deed Sale | Nov 23, 2021 · Amount on Record |
| Deed Document Number | 2021322969 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 525 WEBSTER DR, MARTINEZ, CA 94553-6041 |
| Transaction Type | Mortgage |
| Record Updated | Nov 03, 2022 |
| Name | Verified Name |
|---|---|
| Address | 525 WEBSTER DR, MARTINEZ, CA 94553-6041 |
| Document Number | 0000164720 |
|---|---|
| Date | Jun 07, 2021 |
| Instrument | 2021-164720 |
| Name | AMERICAN ADVISORS GROUP |
|---|---|
| Type | Mortgage Company |
| Address | IRVINE, CA 92612 |
| Type | Reverse Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 830 Months |
| Due | Aug 27, 2090 |
| Rate Type | Adjustable Rate |
|---|---|
| Rate | 3.19% |
| Type Change Date | Jun 01, 2021 |
| Change Frequency | Monthly |
| Index | 1-Year CMT |
| Max Rate | 8.19% |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 23, 2021 |
| Property Address | 525 WEBSTER DR, MARTINEZ, CA 94553-6041 |
| Document Number | 0000322969 |
| Map Reference | MB 109 PG 45 |
| Instrument Date | Nov 16, 2021 |
| Instrument | 2021-322969 |
| Transaction Type | Transfer |
| Record Updated | Nov 03, 2022 |
| Title Company | FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO |
| Amount | Amount Recorded |
|---|---|
| Downpayment | Downpayment on File |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 525 WEBSTER DR, MARTINEZ, CA 94553-6041 |
| Document Number | 0000322970 |
|---|---|
| Date | Nov 23, 2021 |
| Instrument | 2021-322970 |
| Name | ROCKET MORTGAGE LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 361 Months |
| Due | Dec 01, 2051 |
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 | $930,890 (+2%) Land $692,756 Building $238,134 | |
| 2025 | $11,187.00 (+11.37%) | $912,638 (+12.12%) Land $679,173 Building $233,465 |
| 2023 | $10,045.00 (-5.81%) | $814,000 Land $606,000 Building $208,000 |
| 2022 | $10,665.00 |
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 | 8 in force |
| Nearby Flood Claims | 4 (1995–1998) |
| Claims Outside the SFHA | 1 of 4 |
| Most Recent Claim | Mar 1998 · Severe Winter Storms And Flooding |
| Wildfire Risk | Moderate above 54% of the US · lower than 68% of California |
|---|---|
| Wildfire Likelihood | 0.1% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL | 100 / 20 |
May also be available: T-Mobile USA.
Based on FCC filings for 548 locations within half a mile of this property.
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 | CITY OF MARTINEZ serves 31,015 people |
|---|---|
| Water Source | Purchased surface water from CONTRA COSTA WATER DISTRICT |
| Last State Inspection | Oct 2025 |
| Lead | Under 1 ppb (2023–2025) 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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