Contra Costa County property record for 300 4th St, Oakley, CA 94561
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 1.5 ba · 1,916 sqft · built 1954 |
| Lot Size | 0.14 acres (6,075 sqft) |
| Owner | 2 Individual Names on Record |
| Tax Bill | $2,621 (2025) |
| Deeds & Mortgages | Nov 2023 Transfer Nov 2023 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 035-163-015-7 |
| Primary APN | 035-163-015-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 1.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 1,916 sqft Living Area |
| Gross Area | 1,198 sqft |
| 1st Floor Area | 1,198 sqft |
| Year Built | Built 1954 |
|---|---|
| Effective Year Built | Effective 1954 |
| Lot Area | 6,075 sqft (0.14 acres) |
| Garage Type | Attached |
| Garage Area | 550 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 300 4TH ST |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-2170 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | O HARA ADDN LOT 17 BLK 17 EX MR |
| Legal Subdivision | O HARA ADD |
| Legal Block | 17 |
| Legal Lot Number | 17 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 302007 |
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 | 2 Individual Names on Record |
|---|---|
| Mailing Address | 300 4TH ST, OAKLEY, CA 94561-2170 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Tenants in Common |
| Date | Document |
|---|---|
| Nov 20, 2023 | Intrafamily Transfer, Transfer |
| Nov 20, 2023 | Affidavit of Death of Joint Tenant, Transfer |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Transfer Date | Nov 14, 2023 |
| Transfer Doc | 0000124121 |
| Record Updated | Sep 20, 2026 |
| Document Type | Intrafamily Transfer |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 20, 2023 |
| Property Address | 300 4TH ST, OAKLEY, CA 94561-2170 |
| Document Number | 0000124122 |
| Map Reference | VOL C PG 60 |
| Instrument Date | Nov 17, 2023 |
| Instrument | 2023-124122 |
| Transaction Type | Transfer |
| Record Updated | Dec 5, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Revocable Trust |
| Address | 1424 SAINT FRANCES DR, ANTIOCH, CA 94509-4630 |
| Document Type | Affidavit of Death of Joint Tenant |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Nov 20, 2023 |
| Property Address | 300 4TH ST, OAKLEY, CA 94561-2170 |
| Document Number | 0000124121 |
| Map Reference | VOL C PG 60 |
| Instrument Date | Oct 17, 2023 |
| Instrument | 2023-124121 |
| Transaction Type | Transfer |
| Record Updated | Dec 5, 2023 |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Address | 1424 SAINT FRANCES DR, ANTIOCH, CA 94509-4630 |
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 | $572,220 (+300.15%) Land $291,312 Building $280,908 | |
| 2025 | $2,621.00 (+2.62%) | $143,000 (+4.04%) Land $67,342 Building $75,658 |
| 2023 | $2,554.00 (+0.59%) | $137,449 Land $64,728 Building $72,721 |
| 2022 | $2,539.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Nearby Flood Policies | 8 in force |
| Nearby Flood Claims | 1 (1998) |
| Most Recent Claim | Feb 1998 · Severe Winter Storms And Flooding |
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 94% of the US · lower than 96% of California |
|---|---|
| Wildfire Likelihood | 0.01% 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 240 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
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