Contra Costa County property record for 4340 Rio Ln, Bay Point, CA 94565
| Property Type | Rural Home |
|---|---|
| Details | 2,082 sqft · built 1974 |
| Lot Size | 3.6 acres (156,816 sqft) |
| Owner | 2 Company Names on Record |
| Last Sale | $1,100,000 (Nov 2024) |
| Tax Bill | $12,962 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 098-484-004-1 |
| Primary APN | 098-484-004-1 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 2,082 sqft Living Area |
| 1st Floor Area | 2,082 sqft |
| Year Built | Built 1974 |
|---|---|
| Effective Year Built | Effective 1985 |
| Lot Area | 156,816 sqft |
| Street Address | 4340 RIO LN |
|---|---|
| City | BAY POINT |
| State | CA |
| Zip | 94565-6732 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Rural Home |
| Local Zoning Code | A2 |
| Legal Description | TRACT 6450 PCL D |
| Legal Subdivision | SUBDIVISION 6450 PRCL D |
| Legal Tract | 6450 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2011 |
| Census Tract | 315000 |
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 Company Names on Record |
|---|---|
| Mailing Address | 4340 RIO LN, BAY POINT, CA 94565-6732 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Life Tenant |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Nov 1, 2024 · Amount on Record |
| Deed Sale | Nov 1, 2024 · Amount on Record |
| Deed Document Number | 2024118779 |
| Prior Transfer Date | Oct 5, 1993 |
| Prior Transfer Doc | 0000291598 |
| Record Updated | Oct 29, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,122,000 (+2%) Land $663,000 Building $459,000 | |
| 2025 | $12,962.00 (+671.09%) Homeowner's exemption | $1,100,000 (+1,184.22%) Land $650,000 Building $450,000 |
| 2023 | $1,681.00 (+0.54%) Homeowner's exemption | $85,655 Land $14,985 Building $70,670 |
| 2022 | $1,672.00 |
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
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 67% of the US · lower than 81% of California |
|---|---|
| Wildfire Likelihood | 0.03% annual chance |
| Exposure | Indirect within 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 | GOLDEN STATE WATER COMPANY - BAY POINT private · serves 23,765 people · EPA ID CA0710002 |
|---|---|
| Water Source | Purchased surface water from several systems |
| Last State Inspection | Jun 2023 |
| Lead | Under 1 ppb (2024–2026) 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 445 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
May also be available: AT&T, Unwired, Verizon.
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