Contra Costa County property record for 1831 Harrison St, Apt 1, Concord, CA 94520
| Property Type | Quadplex |
|---|---|
| Details | 3,390 sqft · built 1972 |
| Lot Size | 0.11 acres (4,800 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $8,180 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 126-041-032-7 |
| Primary APN | 126-041-032-7 |
|---|---|
| Alternative APN |
|
| Total Rooms | 4 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 3,390 sqft Living Area |
| 1st Floor Area | 3,390 sqft |
| Year Built | Built 1972 |
|---|---|
| Effective Year Built | Effective 1972 |
| Architectural Style | Quadruplex |
| Lot Area | 4,800 sqft (0.11 acres) |
| Garage Type | Carport |
| Carport | Carport |
| Parking Spaces | 4 Parking Spaces |
| Street Address | 1831 HARRISON ST, 1 |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-2336 |
| Property Category | Residential |
| Property Type | Residential > Multi-Unit > Quadplex |
| Local Zoning Code | DB |
| Legal Description | BLUM & WITTENMYER ADDN LOT 30 BLK 3 |
| Legal Subdivision | BLUM & WITTENMYER ADD |
| Legal Block | 3 |
| Legal Lot Number | 30 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2002 |
| Census Tract | 328000 |
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 | Company Name on Record |
|---|---|
| Mailing Address | 58 VIA PESCARA, AMERICAN CANYON, CA 94503-1408 |
| Owner Type | Company |
| Vesting | Trust |
| Deed Names | Name on Deed |
|---|---|
| Last Transfer Date | Jun 2, 2023 |
| Transfer Doc | 0000054833 |
| 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 | $409,964 (+2%) Land $117,122 Building $292,842 | |
| 2025 | $8,180.00 (+7.07%) | $401,926 (+4.04%) Land $114,826 Building $287,100 |
| 2023 | $7,640.00 (+2.83%) | $386,320 Land $110,368 Building $275,952 |
| 2022 | $7,430.00 |
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
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
Values are read at the parcel center point; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within 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 292 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable · Fiber in parts of the area | 2,000 / 250 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
May also be available: AT&T, T-Mobile, Verizon.
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