Contra Costa County property record for 5100 Clayton Rd, Concord, CA 94521
| Property Type | Regional Shopping Center, Mall |
|---|---|
| Details | 90,271 sqft · built 1977 |
| Lot Size | 12.8 acres (558,700 sqft) |
| Owner | Company Name on Record |
| Tax Bill | $206,470 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 133-111-010-4 |
| Primary APN | 133-111-010-4 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 90,271 sqft Gross Area |
| 1st Floor Area | 90,271 sqft |
| Year Built | Built 1977 |
|---|---|
| Effective Year Built | Effective 1978 |
| Lot Area | 558,700 sqft |
| Street Address | 5100 CLAYTON RD |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94521-3139 |
| Property Category | Commercial |
| Property Type | Commercial > Retail > Regional Shopping Center, Mall |
| Legal Description | POR RO MONTE DEL DIABLO & TR ADJ |
| Legal Subdivision | RO MONTE DEL DIABLO |
| Legal Lot Number | A |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 2 |
| Census Block | 2000 |
| Census Tract | 334008 |
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 | 30 BAYWOOD AVE, SAN MATEO, CA 94402-1517 |
| Owner Type | Company |
| Vesting | Partnership |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Apr 4, 2007 |
| Deed Sale | Apr 4, 2007 |
| Prior Sale | Mar 2, 2001 |
| Deed Document Number | 200797990 |
| Record Updated | Oct 29, 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 | $16,174,107 (+2%) Land $9,068,252 Building $7,105,855 | |
| 2025 | $206,470.00 (+3.64%) | $15,856,969 (+4.27%) Land $8,890,444 Building $6,966,525 |
| 2023 | $199,215.00 (-3.76%) | $15,207,584 Land $8,545,218 Building $6,662,366 |
| 2022 | $207,005.00 |
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 18 policies |
| Community Rating System | Class 7 (15% premium discount) |
| Nearby Flood Policies | 18 in force |
| Nearby Flood Claims | 1 (2024) |
| Most Recent Claim | Nov 2024 · other causes |
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 93% of the US · lower than 96% 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 558 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband Cable | 1,500 / 50 |
| Unwired Fixed Wireless | 300 / 25 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T DSL | 100 / 20 |
May also be available: Verizon.
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