131 Williamson Ct, Martinez, CA 94553 Property Records

Contra Costa County property record for 131 Williamson Ct, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	5 bd · 3.5 ba · 2,559 sqft · built 1996
Lot Size	0.216 acres (9,400 sqft)
Owner	Company Name on File
Last Sale	$850,000 (Nov 2018)
Tax Bill	$13,193 (2025)
Deeds & Mortgages	Jan 2018 Line of Credit Jan 2019 Transfer + 2 more
Flood Zone	Zone X (minimal risk)
APN	`161-291-024-8`

Property Details

APN / Parcel Number

Primary APN	`161-291-024-8`
Alternative APN	`161-291-024`

Interior

Bedrooms	5 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Total Rooms	13 Rooms
Stories	2 Stories
Building Area	2,559 sqft Living Area
Gross Area	1,943 sqft
1st Floor Area	764 sqft
2nd Floor Area	1,179 sqft

Exterior

Year Built	Built 1996
Effective Year Built	Effective 2007
Exterior Material	Wood Siding
Roof Material	Composition Shingle
Lot Area	9,400 sqft (0.216 acres)
Garage Type	Attached
Garage Area	462 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	131 WILLIAMSON CT
City	MARTINEZ
State	CA
Zip	94553-6850
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	TR 7586 LTS 8&9
Legal Subdivision	CREEKSIDE COLLECTION/SHADOWBRO
Legal Tract	7586
Legal Lot Number	8,9
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3005
Census Tract	320004

Owner

Source: Contra Costa County assessment roll, 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 File
Mailing Address	131 WILLIAMSON CT, MARTINEZ, CA 94553-6850
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Jan 9, 2018	Deed of Trust, Mortgage · Line of Credit UNIVEST BANK & TRUST CO
Jan 25, 2019	Quit Claim Deed, Transfer Quitclaim
Nov 7, 2018	Quit Claim Deed, Transfer FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO
Nov 7, 2018	Grant Deed, Transfer FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Assessor's Deed Record

Deed Names	Verified Name on Deed
Last Sale	Nov 7, 2018 · Amount on Record
Deed Sale	Nov 7, 2018 · Amount on Record
Prior Sale	May 17, 2013
Deed Document Number	2018181279
Last Transfer Date	Jan 24, 2019
Transfer Doc	0000011042
Record Updated	Sep 20, 2026

January 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	131 WILLIAMSON CT, MARTINEZ, CA 94553-6850
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	MEMBERS TITLE CO OF CA

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000002769
Date	Jan 9, 2018
Instrument	2018-002769

Lender

Name	UNIVEST BANK & TRUST CO
Type	Bank
Address	FLINT, MI 48501

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	144 Months
Due	Jan 5, 2030

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

January 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jan 25, 2019
Property Address	131 WILLIAMSON CT, MARTINEZ, CA 94553-6850
Document Number	0000011042
Instrument Date	Jan 24, 2019
Instrument	11042
Transaction Type	Transfer
Record Updated	Feb 4, 2019

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	31-133 WILLIAMSON CT MARTINEZ CA 945536850, MARTINEZ, CA 94553-6850

November 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Nov 7, 2018
Property Address	131 WILLIAMSON CT, MARTINEZ, CA 94553-6850
Document Number	0000181280
Instrument Date	Nov 5, 2018
Instrument	181280
Transaction Type	Transfer
Record Updated	Nov 16, 2018
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	131-133 WILLIAMSON CT MARTINEZ CA 945536850, MARTINEZ, CA 94553-6850

November 2018: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Nov 7, 2018
Property Address	131 WILLIAMSON CT, MARTINEZ, CA 94553-6850
Document Number	0000181279
Instrument Date	Nov 2, 2018
Instrument	181279
Transaction Type	Transfer
Record Updated	Nov 16, 2018
Title Company	FIDELITY NATIONAL TITLE, FIDELITY NATIONAL TITLE CO

Transaction

Amount	Amount Recorded
Tax	$935.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Separate Estate/Property
Address	131-133 WILLIAMSON CT MARTINEZ CA 945536850, MARTINEZ, CA 94553-6850

Tax Assessment & Valuation

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

Property Jurisdictions

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

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$967,149 (+2%) Land $512,020 Building $455,129
2025	$13,193.00 (-9.69%) Homeowner's exemption	$948,186 (+4.04%) Land $501,981 Building $446,205
2023	$14,609.00 (+17.58%) Homeowner's exemption	$911,369 Land $482,490 Building $428,879
2022	$12,425.00

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

Flood

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
Nearby Flood Claims	1 (1979)
Most Recent Claim	Oct 1979 · rainfall accumulation

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

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within ember reach

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 454 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
T-Mobile USA Fixed Wireless	100 / 20

May also be available: AT&T, Radiate Holdings, Verizon.

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