Contra Costa County property record for 137 Mason Cir, Concord, CA 94520
| Property Type | Light Industrial |
|---|---|
| Details | 14,100 sqft · built 1985 |
| Lot Size | 1.22 acres (53,578 sqft) |
| Owner | Company Name on File |
| Tax Bill | $31,911 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 159-070-039-7 |
| Primary APN | 159-070-039-7 |
|---|---|
| Alternative APN |
|
| Stories | 1 Story |
|---|---|
| Building Area | 14,100 sqft Gross Area |
| 1st Floor Area | 14,100 sqft |
| Year Built | Built 1985 |
|---|---|
| Effective Year Built | Effective 1986 |
| Lot Area | 53,578 sqft |
| Street Address | 137 MASON CIR |
|---|---|
| City | CONCORD |
| State | CA |
| Zip | 94520-1213 |
| Property Category | Industrial |
| Property Type | Industrial > Light Industrial |
| Legal Description | PCL MAP 112 PG 47 PCL 1 EX MR |
| Legal Tract | 112PM47 |
| Jurisdiction | CONTRA COSTA CA |
| Township / Civil Division | CENTRAL CONTRA COSTA |
| Census Block Group | 1 |
| Census Block | 1029 |
| Census Tract | 315000 |
137 Mason Cir, an industrial property, is owned by a company that acquired it in January 2007.
Source: Contra Costa County records, as of July 14, 2026
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 370 CIVIC DR, PLEASANT HILL, CA 94523-1921 |
| Owner Type | Company |
| Vesting | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jan 16, 2007 |
| Deed Sale | Jan 16, 2007 |
| Prior Sale | May 12, 2005 |
| Deed Document Number | 200712674 |
| Record Updated | Oct 29, 2026 |
The 2025 property tax bill for 137 Mason Cir was $31,911.
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 | $2,708,505 (+2%) Land $762,073 Building $1,946,432 | |
| 2025 | $31,911.00 | $2,655,398 Land $747,131 Building $1,908,267 |
| 2023 | $31,346.00 (-12.78%) | $2,552,287 Land $718,120 Building $1,834,167 |
| 2022 | $35,938.00 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 137 Mason Cir in Zone X, an area of minimal flood risk, though there have been 1 flood claim nearby since 1993.
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 File 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.
The area around 137 Mason Cir 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 82 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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