Contra Costa County property record for 4850 Sandmound Blvd, Oakley, CA 94561
| Property Type | Harbor & Marine Transportation |
|---|---|
| Details | 3,336 sqft · built 1985 |
| Lot Size | 0.817 acres (35,600 sqft) |
| Owner | 2 Individual Names on File |
| Tax Bill | $8,573 (2025) |
| Flood Zone | Zone AE (high risk) |
| APN | 032-230-036-9 |
| Primary APN | 032-230-036-9 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 3,336 sqft Gross Area |
| 1st Floor Area | 3,336 sqft |
| Year Built | Built 1985 |
|---|---|
| Effective Year Built | Effective 1985 |
| Lot Area | 35,600 sqft (0.817 acres) |
| View / Lot | Waterfront |
| Street Address | 4850 SANDMOUND BLVD |
|---|---|
| City | OAKLEY |
| State | CA |
| Zip | 94561-5053 |
| Property Category | Public Works |
| Property Type | Public Works > Harbor & Marine Transportation |
| Local Zoning Code | F1 |
| Legal Description | SANDMOUND TRACT LOTS 52 TO 55 EX MR |
| Legal Subdivision | SANDMOUND |
| Legal Lot Number | 52-55 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | EAST CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4003 |
| Census Tract | 301000 |
4850 Sandmound Blvd, a public works property, is owned and occupied by two individuals who acquired it in April 2004.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 4850 SANDMOUND BLVD, OAKLEY, CA 94561-5053 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Joint Tenants |
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 Transfer Date | Apr 14, 2004 |
| Transfer Doc | 0000143868 |
| Record Updated | Sep 20, 2026 |
The 2025 property tax bill for 4850 Sandmound Blvd was $8,573 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| 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 | $362,583 (+2%) Land $109,977 Building $252,606 | |
| 2025 | $8,573.00 Homeowner's exemption | $355,474 Land $107,821 Building $247,653 |
| 2023 | $8,284.00 (+1.02%) Homeowner's exemption | $341,673 Land $103,635 Building $238,038 |
| 2022 | $8,200.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 4850 Sandmound Blvd in Zone AE, a high-risk flood area; flood insurance is required for federally backed loans.
Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone AE high risk |
|---|---|
| 100-Year Floodplain | Yes 1% annual chance |
| Floodway | No |
| Base Flood Elevation | 9.0 ft |
| Flood Insurance Requirement | Required federally backed loans |
| Flood Insurance Cost | Premium on File median of 49 individual policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 149 units insured incl. 100 condo units |
| Nearby Flood Claims | 2 (2017–2022) |
| Most Recent Claim | Dec 2022 · Severe Winter Storms, Flooding, Landslides, And Mudslides |
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 4850 Sandmound Blvd is high, ranking above 76% of the US, with a 0.4% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | High above 76% of the US · above 53% of California |
|---|---|
| Wildfire Likelihood | 0.4% annual chance |
| Exposure | Direct burnable vegetation |
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 | DELTA MUTUAL WATER COMPANY private · serves 333 people · EPA ID CA0707573 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Mar 2025 |
| Lead | Under 1 ppb (2023–2025) action level 15 ppb |
| Water Quality | Arsenic not recorded as resolved · Jul 2025 |
|---|---|
| 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 77 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 |
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