Contra Costa County property record for 185 Mason Cir, Concord, CA 94520
| Property Type | Industrial Park |
|---|---|
| Details | 30,200 sqft · built 1986 |
| Lot Size | 2.32 acres (101,494 sqft) |
| Owner | Company Name on Record |
| Last Sale | $62,068,000 (Jul 2025) |
| Tax Bill | $61,375 (2025) |
| Deeds & Mortgages | Sep 2022 Mortgage Jul 2022 Transfer |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-070-022-3 |
| Primary APN | 159-070-022-3 |
|---|---|
| Alternative APN |
|
| Total Rooms | 3 Rooms |
|---|---|
| Stories | 1 Story |
| Building Area | 30,200 sqft Gross Area |
| 1st Floor Area | 30,200 sqft |
| Year Built | Built 1986 |
|---|---|
| Effective Year Built | Effective 1986 |
| Lot Area | 101,494 sqft |
| Street Address | 185 MASON CIR |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-1266 |
| Property Category | Industrial |
| Property Type | Industrial > Industrial Park |
| Legal Description | T05994 L0009 B EX MR |
| Legal Subdivision | SUBDIVISION 5994 |
| Legal Tract | 05994 |
| Legal Lot Number | 9 |
| 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, 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 | 185 MASON CIR, CONCORD, CA 94520-1266 |
| Owner Type | Company |
| Vesting | Limited Liability Partnership |
| Date | Document |
|---|---|
| Sep 29, 2022 | Deed of Trust, Mortgage · Commercial Mortgage BANK OF AMERICA NA |
| Jul 27, 2022 | Correction Deed FIDELITY NATIONAL TITLE |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 25, 2025 · Amount on Record |
| Deed Sale | Jul 25, 2025 · Amount on Record |
| Prior Sale | Dec 23, 2011 · Amount on Record |
| Deed Document Number | 202574969 |
| Record Updated | Sep 20, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Property Address | 185 MASON CIR, CONCORD, CA 94520-1266 |
| Transaction Type | Mortgage |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATIONAL TITLE |
| Name | Verified Name |
|---|
| Document Number | 0000147956 |
|---|---|
| Date | Sep 29, 2022 |
| Instrument | 2022-147956 |
| Name | BANK OF AMERICA NA |
|---|---|
| Type | Bank |
| Address | CHARLOTTE, NC 28255 |
| Type | Commercial Mortgage |
|---|
| Document Type | Correction Deed |
|---|---|
| Jurisdiction | CONTRA COSTA CA |
| Recording Date | Jul 27, 2022 |
| Property Address | 185 MASON CIR, CONCORD, CA 94520-1266 |
| Document Number | 0000118660 |
| Map Reference | MB 262 PG 8 |
| Instrument Date | Jul 20, 2022 |
| Instrument | 2022-118660 |
| Record Updated | Nov 3, 2022 |
| Title Company | FIDELITY NATIONAL TITLE |
| Tax | $0.00 |
|---|---|
| Amount Accuracy | Transfer Tax Exempt |
| Additional |
|
| Name | Verified Name |
|---|
| Name | Verified Name |
|---|
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 | $9,025,000 (+71.69%) Land $3,550,000 Building $5,475,000 | |
| 2025 | $61,375.00 (+3.68%) | $5,256,492 (+4.04%) Land $1,197,500 Building $4,058,992 |
| 2023 | $59,194.00 (-2.8%) | $5,052,377 Land $1,151,000 Building $3,901,377 |
| 2022 | $60,901.00 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
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 | Low lower than 99.8% of the US · lower than 99.8% 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 36 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 250 |
| Astound Broadband 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.
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