Contra Costa County property record for 4010 Nelson Ave, Concord, CA 94520 · Last verified July 2026
| Property Type | Industrial Park |
|---|---|
| Details | 36,513 sqft · built 1997 |
| Lot Size | 2.31 acres (101,059 sqft) |
| Owner | Company Name on File |
| Last Sale | $2,800,000 (Aug 1997) |
| Tax Bill | $3,978 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-430-028-5 |
| Primary APN | 159-430-028-5 |
|---|---|
| Alternative APN |
|
| Total Rooms | 2 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 36,513 sqft Gross Area |
| 1st Floor Area | 36,513 sqft |
| Year Built | Built 1997 |
|---|---|
| Effective Year Built | Effective 1997 |
| Lot Area | 101,059 sqft |
| Street Address | 4000 NELSON AVE, 4010 |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-1200 |
| Property Category | Industrial |
| Property Type | Industrial > Industrial Park |
| Legal Description | TR 6559 POR LOT 7 |
| Legal Subdivision | SUBDIVISION MAP 6559 |
| Legal Tract | 6559 |
| Legal Lot Number | 7 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1029 |
| Census Tract | 315000 |
Source: Contra Costa County records · APN 159-430-028-5
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 | Company Name on File |
|---|---|
| Mailing Address | 4010 NELSON AVE, CONCORD, CA 94520-1200 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
| Deed Names | Verified Name on Deed |
|---|---|
| Last Sale | Aug 11, 1997 · Amount on Record |
| Deed Sale | Aug 11, 1997 · Amount on Record |
| Deed Document Number | 1997143397 |
| 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 | $7,232,319 (+1.33%) Land $814,344 Building $6,417,975 | |
| 2025 | $3,978.00 (+42.17%) Additional exemption filed | $7,137,151 (+20.31%) Land $798,377 Building $6,338,774 |
| 2023 | $2,798.00 (-27.02%) Additional exemption filed | $5,932,100 Land $767,376 Building $5,164,724 |
| 2022 | $3,834.00 |
Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133150001, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026
| FEMA Flood Zone | Zone X |
|---|---|
| Special Flood Hazard Area | No |
| Flood Hazard | Minimal |
| 500-Year Floodplain | No |
| Flood Insurance Cost | Premium on Record median of 10 individual NFIP policies nearby |
| 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, rainfall accumulation, Severe Winter Storm, Mud & Land Slides, & Flooding |
| Wildfire Risk | Not rated no burnable land in reach |
|---|---|
| Wildfire Likelihood | Negligible |
| Exposure | None beyond 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, availability as of December 31, 2025 · Published October 2026 · based on 282 locations within about half a mile of this property
| Provider | Technology | Download / Upload (Mbps) |
|---|---|---|
| Radiate Holdings | Cable | 1,500 / 50 |
| Unwired | Fixed Wireless | 300 / 25 |
May also be available at this address: T-Mobile USA, Xfinity, AT&T, Sonic Telecom, Verizon. Availability varies by address; speeds are provider-advertised maximums, not measured.
5G and 4G LTE
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