Contra Costa County property record for 509 Lassen Way, Oakley, CA 94561
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 2 ba · 1,686 sqft · built 2005 |
| Lot Size | 0.103 acres (4,500 sqft) |
| Owner | Individual Name on Record |
| Last Sale | $635,000 (Jul 2021) |
| Tax Bill | $2,731 (2025) |
| Deeds & Mortgages | Jul 2021 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 033-420-043-3 |
| Primary APN | 033-420-043-3 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,686 sqft Living Area |
| 1st Floor Area | 1,686 sqft |
| Year Built | Built 2005 |
|---|---|
| Effective Year Built | Effective 2005 |
| Lot Area | 4,500 sqft (0.103 acres) |
| Garage Type | Attached |
| Garage Area | 467 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 509 LASSEN WAY |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-5232 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | T8816 L43 |
| Legal Subdivision | SUBDIVISION 8816 |
| Legal Tract | 8816 |
| Legal Lot Number | 43 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2018 |
| Census Tract | 302012 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Individual Name on Record |
|---|---|
| Mailing Address | 509 LASSEN WAY, OAKLEY, CA 94561-5232 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 9, 2021 · Amount on Record |
| Deed Sale | Jul 9, 2021 · Amount on Record |
| Prior Sale | Oct 28, 2008 · Amount on Record |
| Deed Document Number | 2021195688 |
| Prior Transfer Date | Jul 25, 2015 |
| Prior Transfer Doc | 0000172578 |
| Record Updated | Oct 29, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 9, 2021 |
| Property Address | 509 LASSEN WAY, OAKLEY, CA 94561-5232 |
| Document Number | 0000195688 |
| Map Reference | MB 467 PG 4 |
| Instrument Date | Jul 7, 2021 |
| Instrument | 2021-195688 |
| Transaction Type | Transfer |
| Record Updated | Nov 3, 2022 |
| Title Company | OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY |
| Amount | Amount Recorded |
|---|---|
| Tax | $0.00 |
| Amount Accuracy | Rounded by County |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 509 LASSEN WAY, OAKLEY, CA 94561-5232 |
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 | $90,775 (+2%) Land $42,011 Building $48,764 | |
| 2025 | $2,731.00 (+3.84%) | $88,996 (+4.04%) Land $41,188 Building $47,808 |
| 2023 | $2,630.00 (-1.76%) | $85,542 Land $39,590 Building $45,952 |
| 2022 | $2,677.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
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 minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 2 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 93% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | 0.02% annual chance |
| Exposure | None beyond ember reach |
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 597 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| AT&T DSL · Fiber in parts of the area | 100 / 20 |
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