Contra Costa County property record for 1781 Alameda Diablo, Diablo, CA 94528 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 4 bd · 3.5 ba · 3,196 sqft · built 1959 |
| Lot Size | 0.679 acres (29,580 sqft) |
| Owner | Company Name on File |
| Tax Bill | $15,409 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 195-192-010-5 |
| Primary APN | 195-192-010-5 |
|---|---|
| Alternative APN |
|
| Bedrooms | 4 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 6 Rooms |
| Stories | 2 Stories |
| Building Area | 3,196 sqft Living Area |
| 1st Floor Area | 2,469 sqft |
| 2nd Floor Area | 727 sqft |
| Year Built | Built 1959 |
|---|---|
| Effective Year Built | Effective 1959 |
| Lot Area | 29,580 sqft (0.679 acres) |
| Garage Type | Attached |
| Garage Area | 552 sqft |
| Parking Spaces | 2 Parking Spaces |
| Street Address | 1781 ALAMEDA DIABLO |
|---|---|
| City | DIABLO |
| State | CA |
| Zip | 94528 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | MT DIABLO EST PARK #1 POR LOTS 125 & 128 |
| Legal Subdivision | MOUNT DIABLO ESTATE PARK |
| Legal Lot Number | 125 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1017 |
| Census Tract | 346205 |
Source: Contra Costa County records · APN 195-192-010-5
Assessment roll updated July 14, 2026 · Last verified July 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | PO BOX 883, DIABLO, CA 94528-0883 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Transfer Date | Nov 13, 2015 |
| Transfer Doc | 0000242098 |
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
Assessed value is set for property tax purposes and is not a market price estimate.
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $1,296,779 (+2%) Land $693,468 Building $603,311 | |
| 2025 | $15,409.00 (+3.85%) | $1,271,353 (+4.04%) Land $679,871 Building $591,482 |
| 2023 | $14,838.00 (+0.86%) | $1,221,987 Land $653,472 Building $568,515 |
| 2022 | $14,711.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133462051, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Flood Insurance Cost | Premium on Record median of 18 individual NFIP policies nearby |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 18 in force |
| Nearby Flood Claims | 1 (2017) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Feb 2017, other causes, Severe Winter Storms, Flooding, And Mudslides |
| Wildfire Risk | Moderate above 70% of the US · above 45% of California |
|---|---|
| Wildfire Likelihood | About 1 in 321 per year |
| Exposure | Direct burnable vegetation at the parcel |
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: FCC Broadband Data Collection, availability as of December 31, 2025 · Published October 2026 · based on 153 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Xfinity | Cable | 2,000 / 250 |
| Unwired | Fixed Wireless | 300 / 25 |
| T-Mobile USA | Fixed Wireless | 100 / 20 |
| AT&T | DSL | 100 / 20 |
May also be available at this address: Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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