140 Mason Cir, Concord, CA 94520 Property Records

Contra Costa County property record for 140 Mason Cir, Concord, CA 94520

Property Summary

Property Type	Industrial Park
Details	27,748 sqft · built 1984
Lot Size	1.75 acres (76,230 sqft)
Owner	Company Name on File
Last Sale	$5,000,000 (Aug 2019)
Tax Bill	$72,838 (2025)
Deeds & Mortgages	Dec 2019 Mortgage Jun 2022 Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`159-070-031-4`

Property Details

APN / Parcel Number

Primary APN	`159-070-031-4`
Alternative APN	`159-070-031`

Interior

Total Rooms	12 Rooms
Stories	1 Story
Building Area	27,748 sqft Gross Area
1st Floor Area	27,748 sqft

Exterior

Year Built	Built 1984
Effective Year Built	Effective 1985
Exterior Material	Concrete
Construction Type	Concrete
Roof Type	Flat
Roof Material	Composition Shingle
Lot Area	76,230 sqft

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C

Location & Zoning

Street Address	140 MASON CIR
City	CONCORD
State	CA
Zip	94520-8549
Property Category	Industrial
Property Type	Industrial > Industrial Park
Legal Description	T05994 L0018 B EX MR
Legal Subdivision	SUBDIVISION 5994
Legal Tract	05994
Legal Lot Number	18
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1082
Census Tract	315000

Owner

140 Mason Cir, an industrial property, is owned by a company that bought it in August 2019.

Source: Contra Costa County records, as of July 14, 2026

Owner of Record	Company Name on File
Mailing Address	20 MANZANITA AVE, SAN RAFAEL, CA 94901-2522
Owner Type	Company
Vesting	Limited Liability Company

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Deeds, Mortgages & Sale History

Date	Document
Dec 24, 2019	Deed of Trust, Mortgage · Commercial Mortgage FIRST REPUBLIC BANK
Jun 2, 2022	Intrafamily Transfer, Transfer · Loan Assumption FIRST REPUBLIC BANK
Aug 2, 2019	Grant Deed, Transfer TICOR TITLE INSURANCE COMPANY, TICOR TITLE
Aug 2, 2019	Quit Claim Deed, Transfer TICOR TITLE INSURANCE COMPANY, TICOR TITLE

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Aug 2, 2019 · Amount on File
Deed Sale	Aug 2, 2019 · Amount on File
Prior Sale	Apr 30, 2015 · Amount on File
Deed Document Number	2019121492
Prior Transfer Date	Jul 18, 2013
Prior Transfer Doc	0000184492
Record Updated	Oct 29, 2026

December 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	140 MASON CIR, CONCORD, CA 94520-8549
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000231643
Date	Dec 24, 2019
Instrument	2019-231643

Lender

Name	FIRST REPUBLIC BANK
Type	Bank
Address	SAN FRANCISCO, CA 94111

Agreement

Type	Commercial Mortgage
Amount	Amount on Record

June 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Jun 2, 2022
Property Address	140 MASON CIR, CONCORD, CA 94520-8549
Document Number	0000092930
Map Reference	MB 262 PG 8
Instrument Date	May 19, 2022
Instrument	2022-092930
Transaction Type	Transfer
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name
Address	20 MANZANITA AVE, 20, SAN RAFAEL, CA 94901-2522

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000092931
Date	Jun 2, 2022
Instrument	2022-092931

Lender

Name	FIRST REPUBLIC BANK
Type	Bank

Agreement

Type	Loan Assumption
Amount	Amount on Record

August 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Aug 2, 2019
Property Address	140 MASON CIR, CONCORD, CA 94520-8549
Document Number	0000121492
Instrument Date	Jul 23, 2019
Instrument	121492
Transaction Type	Transfer
Record Updated	Aug 8, 2019
Title Company	TICOR TITLE INSURANCE COMPANY, TICOR TITLE

Transaction

Amount	Amount on Record
Tax	$5,500.00
Amount Accuracy	Confirmed
Additional	Notice of Default Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Personal Trust
Address	235 MONTGOMERY ST #16TH SAN FRANCISCO CA 941042902, 16TH, SAN FRANCISCO, CA 94104-2902

August 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Aug 2, 2019
Property Address	140 MASON CIR, CONCORD, CA 94520-8549
Document Number	0000121491
Instrument Date	Jun 20, 2019
Instrument	121491
Transaction Type	Transfer
Record Updated	Aug 8, 2019
Title Company	TICOR TITLE INSURANCE COMPANY, TICOR TITLE

Transaction

Tax	$0.00
Additional	Quitclaim Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company

Tax Assessment & Valuation

The 2025 property tax bill for 140 Mason Cir was $72,838.

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Municipality	Concord City
Unified School District	Mount Diablo Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$5,577,591 (+2%) Land $1,701,164 Building $3,876,427
2025	$72,838.00	$5,468,227 Land $1,667,808 Building $3,800,419
2023	$64,669.00 (+1.14%)	$5,255,891 Land $1,603,046 Building $3,652,845
2022	$63,940.00

Assessed value is set for property tax purposes and is not a market price estimate.

Flood

FEMA maps place 140 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.

Wildfire

The area around 140 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.

Drinking Water

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

Violations Reported to EPA

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.

Internet Providers

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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