Contra Costa County property record for 2285 Mount Diablo St, Concord, CA 94520
| Property Type | Single Family Home |
|---|---|
| Details | 2 bd · 2 ba · 1,507 sqft · built 1938 |
| Lot Size | 0.184 acres (8,000 sqft) |
| Owner | 2 Individual Names on File |
| Last Sale | $430,000 (Mar 2004) |
| Tax Bill | $7,833 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 112-123-004-7 |
| Primary APN | 112-123-004-7 |
|---|---|
| Alternative APN |
|
| Bedrooms | 2 Beds |
|---|---|
| Full Baths | 2 Baths |
| Total Rooms | 7 Rooms |
| Stories | 1 Story |
| Building Area | 1,507 sqft Living Area |
| 1st Floor Area | 1,507 sqft |
| Year Built | Built 1938 |
|---|---|
| Effective Year Built | Effective 1945 |
| Lot Area | 8,000 sqft (0.184 acres) |
| Garage Type | Attached |
| Garage Area | 271 sqft |
| Parking Spaces | 1 Parking Space |
| Heating System | Central |
|---|
| Street Address | 2285 MOUNT DIABLO ST |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-2211 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Local Zoning Code | R6 |
| Legal Description | BOYDS ADDN N LY 80 FT OF LOT 5 BLK 3 |
| Legal Subdivision | BOYDS ADD |
| Legal Block | 3 |
| Legal Lot Number | 5 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4013 |
| Census Tract | 329000 |
Source: Contra Costa County records · APN 112-123-004-7
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 | 2 Individual Names on File |
|---|---|
| Mailing Address | 2285 MOUNT DIABLO ST, CONCORD, CA 94520-2211 |
| Occupancy | Owner Occupied |
| Owner Type | Individual |
| Deed Names | 2 Verified Names on Deed |
|---|---|
| Last Sale | Mar 16, 2004 · Amount on Record |
| Deed Sale | Mar 16, 2004 · Amount on Record |
| Prior Sale | Feb 07, 2003 · Amount on Record |
| Deed Document Number | 200487818 |
| Last Transfer Date | May 22, 2006 |
| Transfer Doc | 0000185168 |
| 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 |
| Municipality | Concord City |
| Unified School District | Mount Diablo 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 | $637,369 (+2%) Land $520,768 Building $116,601 | |
| 2025 | $7,833.00 (+4.64%) Homeowner's exemption | $624,872 (+4.04%) Land $510,557 Building $114,315 |
| 2023 | $7,486.00 (+1.37%) Homeowner's exemption | $600,610 Land $490,733 Building $109,877 |
| 2022 | $7,385.00 |
Source: FEMA National Flood Hazard Layer as of October 12, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 1 in force |
| Nearby Flood Claims | 3 (1980–1983) |
| Most Recent Claim | Jan 1983 · Coastal Storms, Floods, Slides & Tornadoes |
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
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 as of December 31, 2025 · Last verified October 2026
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| Xfinity Cable | 2,000 / 250 |
| Radiate Holdings Cable · Fiber in parts of the area | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile USA Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
Based on FCC filings for 344 locations within half a mile of this property.
Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026
| Water System | CONTRA COSTA WATER DISTRICT serves 210,500 people |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jan 2022 |
| Lead | Under 1 ppb (2026–2028) 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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.
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