Contra Costa County property record for 23 Lost Valley Dr, Orinda, CA 94563
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3 ba · 2,610 sqft · built 1967 |
| Lot Size | 0.682 acres (29,700 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $1,870,000 (Jun 2025) |
| Tax Bill | $4,387 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 272-230-015-5 |
| Primary APN | 272-230-015-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3 Baths |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 2,610 sqft Living Area |
| 1st Floor Area | 2,610 sqft |
| Year Built | Built 1967 |
|---|---|
| Effective Year Built | Effective 1977 |
| Lot Area | 29,700 sqft (0.682 acres) |
| Garage Type | Attached |
| Garage Area | 530 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 23 LOST VALLEY DR |
|---|---|
| City | ORINDA |
| State | CA |
| Zip | 94563-3909 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | LOST VALLEY ESTATES POR LOT 4 |
| Legal Subdivision | LOST VALLEY ESTATES |
| Legal Lot Number | 4 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 3 |
| Census Block | 3007 |
| Census Tract | 353001 |
23 Lost Valley Dr is owned and occupied by two individuals who bought it in June 2025.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Individual Names on File |
|---|---|
| Mailing Address | 23 LOST VALLEY DR, ORINDA, CA 94563-3909 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
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 | Jun 18, 2025 · Amount on File |
| Deed Sale | Jun 18, 2025 · Amount on File |
| Prior Sale | Apr 4, 1994 |
| Deed Document Number | 202561722 |
| Prior Transfer Date | May 17, 2012 |
| Prior Transfer Doc | 0000134282 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 23 Lost Valley Dr was $4,387.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Orinda City |
| Secondary School District | Acalanes Union High School District (09 - 12) |
| Elementary School District | Orinda Union Elementary School District (KG - 08) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,907,400 (+635.58%) Land $1,224,000 Building $683,400 | |
| 2025 | $4,387.00 Homeowner's exemption | $259,306 Land $47,767 Building $211,539 |
| 2023 | $4,234.00 (+1.05%) Homeowner's exemption | $249,239 Land $45,913 Building $203,326 |
| 2022 | $4,190.00 |
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.
FEMA maps place 23 Lost Valley Dr in Zone X, an area of minimal 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 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.
Wildfire risk around 23 Lost Valley Dr is high, ranking above 72% 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 72% of the US · above 47% 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 | EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2021 |
| Lead | Under 1 ppb (2022–2024) 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. This system sells water to local utilities; the supplier billing this address may be one of them.
Source: FCC Broadband Data Collection, based on 100 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: Etheric Networks.
5G (outdoors only) and 4G LTE
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