Contra Costa County property record for 231 Diane Ave, Pittsburg, CA 94565
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 1 ba · 961 sqft · built 1955 |
| Lot Size | 0.116 acres (5,040 sqft) |
| Owner | Individual Name on File |
| Tax Bill | $4,757 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 073-182-007-2 |
| Primary APN | 073-182-007-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 1 Bath |
| Total Rooms | 6 Rooms |
| Stories | 1 Story |
| Building Area | 961 sqft Living Area |
| 1st Floor Area | 961 sqft |
| Year Built | Built 1955 |
|---|---|
| Effective Year Built | Effective 1955 |
| Lot Area | 5,040 sqft (0.116 acres) |
| Garage Type | Attached |
| Garage Area | 613 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 231 DIANE AVE |
|---|---|
| City | PITTSBURG |
| State | CA |
| Zip | 94565-4104 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R4 |
| Legal Description | BILTMORE SUBN LOT 17 |
| Legal Subdivision | BILTMORE SUB |
| Legal Lot Number | 17 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | ANTIOCH-PITTSBURG |
| Census Block Group | 1 |
| Census Block | 1001 |
| Census Tract | 312000 |
231 Diane Ave is owned and occupied by an individual who acquired it in October 2006.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Individual Name on File |
|---|---|
| Mailing Address | 231 DIANE AVE, PITTSBURG, CA 94565-4104 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Single Person |
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 | Name on Deed |
|---|---|
| Last Sale | Aug 10, 2004 |
| Deed Sale | Aug 10, 2004 |
| Prior Sale | Sep 25, 2000 · Amount on File |
| Deed Document Number | 2004308273 |
| Last Transfer Date | Oct 12, 2006 |
| Transfer Doc | 0000330381 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 231 Diane Ave was $4,757 with a homeowner's exemption.
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Pittsburg City |
| Unified School District | Pittsburg Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $207,311 (+2%) Land $42,251 Building $165,060 | |
| 2025 | $4,757.00 Homeowner's exemption | $203,247 Land $41,423 Building $161,824 |
| 2023 | $4,672.00 (-0.68%) Homeowner's exemption | $195,356 Land $39,815 Building $155,541 |
| 2022 | $4,704.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 231 Diane Ave in Zone X, an area of minimal flood risk, though there have been 4 flood claims nearby since 1982.
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 |
| Nearby Flood Claims | 4 (1982–1987) |
| Most Recent Claim | Jan 1987 · tidal / storm surge |
| Claims by Event |
|
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.
No wildfire likelihood is modeled around 231 Diane Ave, so its wildfire risk is not rated.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no wildfire likelihood modeled here |
|---|
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 | CITY OF PITTSBURG serves 62,500 people · EPA ID CA0710008 |
|---|---|
| Water Source | Purchased surface water from CONTRA COSTA WATER DISTRICT |
| Last State Inspection | Apr 2023 |
| 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.
Source: FCC Broadband Data Collection, based on 259 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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