Contra Costa County property record for 525 Marathon Dr, Oakley, CA 94561
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2.5 ba · 1,929 sqft · built 2020 |
| Lot Size | 0.106 acres (4,606 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $566,000 (Aug 2021) |
| Tax Bill | $13,059 (2025) |
| Deeds & Mortgages | Aug 2021 Sale & Mortgage |
| Flood Zone | Zone X (reduced by levee) |
| APN | 032-530-148-9 |
| Primary APN | 032-530-148-9 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 1,929 sqft Living Area |
| 1st Floor Area | 927 sqft |
| 2nd Floor Area | 1,002 sqft |
| Year Built | Built 2020 |
|---|---|
| Effective Year Built | Effective 2021 |
| Lot Area | 4,606 sqft (0.106 acres) |
| Garage Type | Attached |
| Garage Area | 460 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 525 MARATHON DR |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-1065 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T9473 L133 |
| Legal Subdivision | GILBERT PROP PH 1 SUB MAP |
| Legal Tract | 9473 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1025 |
| Census Tract | 302011 |
525 Marathon Dr is owned and occupied by two individuals who bought it in August 2021.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 525 MARATHON DR, OAKLEY, CA 94561-1065 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Aug 2, 2021 · Amount on File |
| Deed Sale | Aug 2, 2021 · Amount on File |
| Deed Document Number | 2021215793 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Aug 2, 2021 |
| Property Address | 525 MARATHON DR, OAKLEY, CA 94561-1065 |
| Document Number | 0000215793 |
| Map Reference | MB 536 PG 1 |
| Instrument Date | Jun 1, 2021 |
| Instrument | 2021-215793 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Title Company | FIRSTAMERICAN TITLE COMPANY, FIRST AMERICAN TITLE COMPANY |
| Amount | Amount on Record |
|---|---|
| Downpayment | Downpayment on Record |
| Loan-to-Value (LTV) | LTV on Record |
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Community Property with Right of Survivorship |
| Address | 525 MARATHON DR, OAKLEY, CA 94561-1065 |
| Document Number | 0000215794 |
|---|---|
| Date | Aug 2, 2021 |
| Instrument | 2021-215794 |
| Name | KBHS HOME LOANS LLC |
|---|---|
| Type | Mortgage Company |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount on Record |
| Term | 360 Months |
| Due | Aug 1, 2051 |
The 2025 property tax bill for 525 Marathon Dr was $13,059 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Oakley City |
| Secondary School District | Liberty Union High School District (09 - 12) |
| Elementary School District | Oakley Union Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $612,221 (+2%) Land $173,188 Building $439,033 | |
| 2025 | $13,059.00 Homeowner's exemption | $600,218 Land $169,793 Building $430,425 |
| 2023 | $12,632.00 (+1.81%) Homeowner's exemption | $576,912 Land $163,200 Building $413,712 |
| 2022 | $12,408.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 525 Marathon Dr in Zone X, where a levee reduces flood risk.
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 reduced by levee · depends on levee performance |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 7 in force |
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.
Wildfire risk around 525 Marathon Dr is moderate, ranking above 64% of the US, with a 0.2% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 64% of the US · lower than 60% of California |
|---|---|
| Wildfire Likelihood | 0.2% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 | DIABLO WATER DISTRICT serves 47,158 people · EPA ID CA0710007 |
|---|---|
| Water Source | Purchased surface water from RANDALL-BOLD WATER TREATMENT PLANT |
| Last State Inspection | Jan 2024 |
| Also Mapped Here | CONTRA COSTA WATER DISTRICT |
| Lead | 2 ppb (2020–2022) 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 762 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| AT&T Fiber | 5,000 / 5,000 |
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
May also be available: T-Mobile.
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