Contra Costa County property record for 1815 Alameda Diablo, Diablo, CA 94528 · Last verified July 2026
| Property Type | Single Family Home |
|---|---|
| Details | 3 bd · 3.5 ba · 3,649 sqft · built 1921 |
| Lot Size | 0.558 acres (24,300 sqft) |
| Owner | Company Name on File |
| Last Sale | $3,150,000 (Sep 2017) |
| Tax Bill | $40,515 (2025) |
| Deeds & Mortgages | Sep 2017 Sale |
| Flood Zone | Zone X (minimal risk) |
| APN | 195-192-002-2 |
| Primary APN | 195-192-002-2 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 3.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 10 Rooms |
| Stories | 1 Story |
| Building Area | 3,649 sqft Living Area |
| 1st Floor Area | 3,649 sqft |
| Year Built | Built 1921 |
|---|---|
| Effective Year Built | Effective 2000 |
| Lot Area | 24,300 sqft (0.558 acres) |
| Garage Type | Attached |
| Garage Area | 902 sqft |
| Parking Spaces | 4 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 1815 ALAMEDA DIABLO |
|---|---|
| City | DIABLO |
| State | CA |
| Zip | 94528 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | MT DIABLO EST PARK #1 LOT 132 POR 129 |
| Legal Subdivision | MOUNT DIABLO ESTATE PARK 01 |
| Legal Lot Number | 132 |
| 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 195-192-002-2
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 734, DIABLO, CA 94528-0734 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Sep 12, 2017 · Amount on Record |
| Deed Sale | Sep 12, 2017 · Amount on Record |
| Prior Sale | Aug 03, 2010 · Amount on Record |
| Deed Document Number | 2017166159 |
| Prior Transfer Date | Jul 05, 2005 |
| Prior Transfer Doc | 0000285437 |
| Record Updated | Sep 20, 2026 |
| Document Type | Grant Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Sep 12, 2017 |
| Property Address | 1815 ALAMEDA DIABLO, DIABLO, CA 94528 |
| Document Number | 0000166159 |
| Instrument Date | Sep 07, 2017 |
| Instrument | 166159 |
| Transaction Type | Transfer |
| Record Updated | Sep 18, 2017 |
| Title Company | FIDELITY NATIONAL TITLE |
| Amount | Amount Recorded |
|---|---|
| Tax | $3,465.00 |
| Amount Accuracy | Full Value |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Personal Trust |
| Address | 43 WEBER PL DANVILLE CA 945261994, DANVILLE, CA 94526-1994 |
| Investor | Possibly a Property Investor |
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 | $3,655,841 (+2%) Land $2,031,024 Building $1,624,817 | |
| 2025 | $40,515.00 (+3.63%) Homeowner's exemption | $3,584,158 (+4.04%) Land $1,991,200 Building $1,592,958 |
| 2023 | $39,094.00 (+0.79%) Homeowner's exemption | $3,444,982 Land $1,913,880 Building $1,531,102 |
| 2022 | $38,788.00 |
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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