122 Williamson Ct, Martinez, CA 94553 Property Records

Contra Costa County property record for 122 Williamson Ct, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	4 bd · 2.5 ba · 1,995 sqft · built 1996
Lot Size	0.099 acres (4,300 sqft)
Owner	2 Individual Names on File
Last Sale	$885,000 (Mar 2022)
Tax Bill	$12,070 (2025)
Deeds & Mortgages	Mar 2022 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`161-291-027-1`

Property Details

APN / Parcel Number

Primary APN	`161-291-027-1`
Alternative APN	`161-291-027`

Interior

Bedrooms	4 Beds
Full Baths	2.5 Baths
Half Baths	1 Half Bath
Total Rooms	9 Rooms
Stories	2 Stories
Building Area	1,995 sqft Living Area
1st Floor Area	837 sqft
2nd Floor Area	1,158 sqft

Exterior

Year Built	Built 1996
Effective Year Built	Effective 2000
Lot Area	4,300 sqft (0.099 acres)
Garage Type	Attached
Garage Area	410 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	122 WILLIAMSON CT
City	MARTINEZ
State	CA
Zip	94553-4194
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	TR7586 POR LOTS 6 & 7
Legal Subdivision	SUBDIVISION 7586
Legal Tract	7586
Legal Lot Number	6,7
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 records · APN 161-291-027-1

Assessment roll updated July 14, 2026 · Last verified July 2026

Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.

Owner of Record	2 Individual Names on File
Mailing Address	122 WILLIAMSON CT, MARTINEZ, CA 94553-4194
Occupancy	Owner Occupied
Owner Type	Individual

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Mar 22, 2022 · Amount on Record
Deed Sale	Mar 22, 2022 · Amount on Record
Prior Sale	May 31, 1996 · Amount on Record
Deed Document Number	202250573
Record Updated	Sep 20, 2026

March 2022: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Mar 22, 2022
Property Address	122 WILLIAMSON CT, MARTINEZ, CA 94553-4194
Document Number	0000050573
Map Reference	MB 359 PG 34
Instrument Date	Mar 18, 2022
Instrument	2022-050573
Transaction Type	Transfer
Record Updated	Nov 03, 2022
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount Recorded
Downpayment	Downpayment on File
Loan-to-Value (LTV)	LTV on Record
Tax	$0.00
Amount Accuracy	Rounded by County
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants
Address	122 WILLIAMSON CT, MARTINEZ, CA 94553-4194

Mortgage

Document Number	0000050574
Date	Mar 22, 2022
Instrument	2022-050574

Lender

Name	AMERICAN PACIFIC MORTGAGE CORP
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Apr 01, 2052

Tax Assessment & Valuation

Source: Contra Costa County records · Assessment roll updated July 14, 2026 · Last verified July 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

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

Year	Tax Bill	Assessed Value
2026		$957,952 (+2%) Land $541,216 Building $416,736
2025	$12,070.00 (+4.3%) Homeowner's exemption	$939,169 (+4.04%) Land $530,604 Building $408,565
2023	$11,572.00 (+120.38%)	$902,700 Land $510,000 Building $392,700
2022	$5,251.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer as of October 12, 2026 · FEMA NFIP claims and policies as of September 2026 · USDA Forest Service Wildfire Risk to Communities as of 2024 · Last verified October 2026

Flood

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

Wildfire

Wildfire Risk	Not rated no burnable land within ember reach

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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

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.

Based on FCC filings for 454 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water System	CONTRA COSTA WATER DISTRICT serves 210,500 people
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 as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.