Contra Costa County property record for 1685 Calle Arroyo, Diablo, CA 94528
| Property Type | Single Family Home |
|---|---|
| Details | 6 bd · 4.5 ba · 4,840 sqft · built 2004 |
| Lot Size | 0.62 acres (27,025 sqft) |
| Owner | 2 Individual Names on Record |
| Last Sale | $3,191,000 (Apr 2014) |
| Tax Bill | $44,137 (2025) |
| Deeds & Mortgages | Dec 2020 Mortgage |
| Flood Zone | Zone X (minimal risk) |
| APN | 195-170-007-7 |
| Primary APN | 195-170-007-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 6 Beds |
|---|---|
| Full Baths | 4.5 Baths |
| Half Baths | 1 Half Bath |
| Total Rooms | 12 Rooms |
| Stories | 2 Stories |
| Building Area | 4,840 sqft Living Area |
| 1st Floor Area | 2,723 sqft |
| 2nd Floor Area | 2,117 sqft |
| Year Built | Built 2004 |
|---|---|
| Effective Year Built | Effective 2008 |
| Lot Area | 27,025 sqft (0.62 acres) |
| Garage Type | Attached |
| Garage Area | 554 sqft |
| Parking Spaces | 2 Parking Spaces |
| Cooling System | Central |
|---|
| Street Address | 1685 CALLE ARROYO |
|---|---|
| City | DIABLO |
| State | CA |
| Zip | 94528 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R20 |
| Legal Description | MT DIABLO EST PARK #1 POR LOTS 96 & 97 |
| Legal Subdivision | MOUNT DIABLO ESTATE PARK 01 |
| Legal Lot Number | 96,97 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1000 |
| Census Tract | 346205 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | 2 Individual Names on Record |
|---|---|
| Mailing Address | 1685 CALLE ARROYO, DIABLO, CA 94528 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Vesting | Community Property |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Apr 25, 2014 · Amount on Record |
| Deed Sale | Apr 25, 2014 · Amount on Record |
| Prior Sale | Mar 16, 2005 · Amount on Record |
| Deed Document Number | 201464672 |
| Prior Transfer Date | Jan 2, 2003 |
| Prior Transfer Doc | 0000014314 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 1685 CALLE ARROYO, DIABLO, CA 94528 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | TITLE365 |
| Name | Verified Name |
|---|---|
| Address | 1685 CALLE ARROYO, DIABLO, CA 94528 |
| Document Number | 0000320005 |
|---|---|
| Date | Dec 21, 2020 |
| Instrument | 2020-320005 |
| Name | ALLY BANK |
|---|---|
| Type | Bank |
| Address | CHARLOTTE, NC 28202 |
| Type | Conventional Mortgage |
|---|---|
| Amount | Amount Recorded |
| Term | 181 Months |
| Due | Jan 1, 2036 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Unified School District | San Ramon Valley Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $3,989,953 (+2%) Land $1,875,566 Building $2,114,387 | |
| 2025 | $44,137.00 (+3.62%) | $3,911,720 (+4.04%) Land $1,838,791 Building $2,072,929 |
| 2023 | $42,596.00 (+0.78%) | $3,759,826 Land $1,767,390 Building $1,992,436 |
| 2022 | $42,266.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone A, within 500 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Flood Insurance Cost | Premium on Record median of 18 policies |
| 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 · Severe Winter Storms, Flooding, 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.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Moderate above 67% of the US · above 42% of California |
|---|---|
| Wildfire Likelihood | 0.3% annual chance |
| Exposure | Indirect within ember reach |
| Adjoins Burnable Land | Yes |
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 130 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 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL | 100 / 20 |
May also be available: Etheric Networks, Verizon.
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