Contra Costa County property record for 4030 Nelson Ave, Concord, CA 94520
| Property Type | Light Industrial |
|---|---|
| Details | 50,454 sqft · built 2001 |
| Lot Size | 3.17 acres (138,520 sqft) |
| Owner | Company Name on File |
| Tax Bill | $86,748 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-430-036-8 |
| Primary APN | 159-430-036-8 |
|---|---|
| Alternative APN |
|
| Total Rooms | 1 Room |
|---|---|
| Stories | 1 Story |
| Building Area | 50,454 sqft Gross Area |
| 1st Floor Area | 50,454 sqft |
| Year Built | Built 2001 |
|---|---|
| Effective Year Built | Effective 2002 |
| Lot Area | 138,520 sqft |
| Street Address | 4030 NELSON AVE |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-1200 |
| Property Category | Industrial |
| Property Type | Industrial > Light Industrial |
| Legal Description | 182PM10 PCL A |
| Legal Tract | 182PM10 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1029 |
| Census Tract | 315000 |
Source: Contra Costa County assessment roll, 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 File |
|---|---|
| Mailing Address | 46901 FISH ROCK RD, GUALALA, CA 95445-7558 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Verified 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 | $7,589,300 (+2%) Land $1,987,227 Building $5,602,073 | |
| 2025 | $86,748.00 (+3.5%) | $7,440,491 (+4.33%) Land $1,948,262 Building $5,492,229 |
| 2023 | $83,811.00 (+0.95%) | $7,131,961 Land $1,872,609 Building $5,259,352 |
| 2022 | $83,019.00 |
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 |
| Flood Insurance Cost | Premium on Record median of 10 policies |
| Community Rating System | Class 6 (20% premium discount) |
| Nearby Flood Policies | 10 in force |
| Nearby Flood Claims | 1 (1993) |
| Claims Outside the SFHA | 1 of 1 |
| Most Recent Claim | Jan 1993 · Severe Winter Storm, Mud & Land Slides, & Flooding |
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 | Not rated no burnable land within ember reach |
|---|
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 36 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Radiate Holdings Cable · Fiber in parts of the area | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: T-Mobile USA.
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