Contra Costa County property record for 1821 Concord Ave, Concord, CA 94520
| Property Type | Medical Building |
|---|---|
| Details | 5,000 sqft · built 1996 |
| Lot Size | 0.572 acres (24,916 sqft) |
| Owner | 2 Company Names on File |
| Last Sale | $1,400,000 (Jun 1997) |
| Tax Bill | $30,473 (2025) |
| Deeds & Mortgages | Aug 2020 Transfer Dec 2019 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 112-110-026-5 |
| Primary APN | 112-110-026-5 |
|---|---|
| Alternative APN |
|
| Total Rooms | 1 Room |
|---|---|
| Stories | 1 Story |
| Building Area | 5,000 sqft Gross Area |
| 1st Floor Area | 5,000 sqft |
| Year Built | Built 1996 |
|---|---|
| Effective Year Built | Effective 1996 |
| Lot Area | 24,916 sqft (0.572 acres) |
| Street Address | 1821 CONCORD AVE |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-2348 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Medical Building |
| Legal Description | POR RO MONTE DEL DIABLO |
| Legal Subdivision | RO MONTE DEL DIABLO |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1005 |
| Census Tract | 328000 |
1821 Concord Ave, a commercial property, is owned by a company that acquired it in April 2024.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 690 SUNOL ST, SAN JOSE, CA 95126-3751 |
| Owner Type | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Date | Document |
|---|---|
| Aug 13, 2020 | Quit Claim Deed, Transfer ATTORNEY ONLY |
| Dec 31, 2019 | Affidavit of Death, Transfer FIRST AMERICAN TITLE |
| Deed Names | 2 Names on Deed |
|---|---|
| Last Sale | Jun 18, 1997 · Amount on File |
| Deed Sale | Jun 18, 1997 · Amount on File |
| Deed Document Number | 1997104456 |
| Last Transfer Date | Apr 12, 2024 |
| Transfer Doc | 0000050103 |
| Record Updated | Sep 20, 2026 |
| Document Type | Quit Claim Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Aug 13, 2020 |
| Property Address | 1821 CONCORD AVE, CONCORD, CA 94520-2348 |
| Document Number | 0000169763 |
| Instrument Date | May 19, 2020 |
| Instrument | 169763 |
| Transaction Type | Transfer |
| Record Updated | Aug 26, 2020 |
| Title Company | ATTORNEY ONLY |
| Tax | $0.00 |
|---|---|
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Company |
| Address | 690 SUNOL ST SAN JOSE CA 951263751, SAN JOSE, CA 95126-3751 |
| Document Type | Affidavit of Death |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Dec 31, 2019 |
| Property Address | 1821 CONCORD AVE, CONCORD, CA 94520-2348 |
| Document Number | 0000235764 |
| Instrument Date | Dec 23, 2019 |
| Instrument | 235764 |
| Transaction Type | Transfer |
| Record Updated | Jan 13, 2020 |
| Title Company | FIRST AMERICAN TITLE |
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|---|
| Relationship | Living Trust |
| Address | 690 SUNOL ST SAN JOSE CA 951263751, SAN JOSE, CA 95126-3751 |
The 2025 property tax bill for 1821 Concord Ave was $30,473.
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 | $2,325,772 (+2%) Land $620,871 Building $1,704,901 | |
| 2025 | $30,473.00 | $2,280,170 Land $608,698 Building $1,671,472 |
| 2023 | $35,455.00 (+5.2%) | $2,191,630 Land $585,062 Building $1,606,568 |
| 2022 | $33,702.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 1821 Concord Ave in Zone X, an area of minimal flood risk.
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.
The area around 1821 Concord Ave has no burnable land within ember reach, so its wildfire risk is not rated.
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 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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