Contra Costa County property record for 2359 Mount Diablo St, Concord, CA 94520
| Property Type | Single Family Home |
|---|---|
| Details | 2,460 sqft · built 1926 |
| Lot Size | 0.31 acres (13,500 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $2,703 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 112-124-010-3 |
| Primary APN | 112-124-010-3 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 2,460 sqft Living Area |
| Gross Area | 1,736 sqft |
| 1st Floor Area | 1,736 sqft |
| Year Built | Built 1926 |
|---|---|
| Effective Year Built | Effective 1930 |
| Lot Area | 13,500 sqft (0.31 acres) |
| Street Address | 2359 MOUNT DIABLO ST |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-2213 |
| Property Category | Residential |
| Property Type | Residential > Single Family > Home |
| Legal Description | BOYDS ADDN LOT 7 & POR 4 & 8 BLK 2 & TR ADJ |
| Legal Subdivision | BOYDS ADD |
| Legal Block | 2 |
| Legal Lot Number | 7 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 4 |
| Census Block | 4010 |
| Census Tract | 329000 |
Source: Contra Costa County records, as of July 14, 2026
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 2121 HARRISON ST, 100, OAKLAND, CA 94612-3788 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Sep 20, 2026 |
Source: Contra Costa County assessment roll, as of July 14, 2026
| Type | Name |
|---|---|
| State | California |
| County | Contra Costa County |
| Municipality | Concord City |
| Unified School District | Mount Diablo Unified School District (KG - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $257,024 (+2%) Land $180,048 Building $76,976 | |
| 2025 | $2,703.00 (+8.77%) Additional exemption filed | $251,985 (+4.04%) Land $176,518 Building $75,467 |
| 2023 | $2,485.00 (+3.89%) Additional exemption filed | $242,202 Land $169,664 Building $72,538 |
| 2022 | $2,392.00 |
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 |
|---|---|
| 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 |
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 | Low lower than 98% of the US · lower than 98.4% of California |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
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 | CONTRA COSTA WATER DISTRICT serves 210,500 people · EPA ID CA0710003 |
|---|---|
| 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, 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 344 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Sonic Telecom Fiber | 10,000 / 10,000 |
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| Verizon Fixed Wireless | 300 / 20 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL · Fiber, Fixed Wireless in parts of the area | 100 / 20 |
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