320 Summerhill Ln, Martinez, CA 94553 Property Records

Contra Costa County property record for 320 Summerhill Ln, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	3 bd · 4 ba · 3,671 sqft · built 1998
Lot Size	5.23 acres (228,254 sqft)
Owner	Company Name on Record
Last Sale	$220,000 (Feb 1997)
Tax Bill	$13,911 (2025)
Deeds & Mortgages	May 2023 Line of Credit Jan 2023 Line of Credit + 1 more
Flood Zone	Zone X (minimal risk)
APN	`367-240-011`

Property Details

APN / Parcel Number

Primary APN	`367-240-011`
Alternative APN	`367-240-011-0`

Interior

Bedrooms	3 Beds
Full Baths	4 Baths
Total Rooms	10 Rooms
Stories	1 Story
Building Area	3,671 sqft Living Area
1st Floor Area	3,145 sqft
Basement Area	526 sqft

Exterior

Year Built	Built 1998
Effective Year Built	Effective 1998
Lot Area	228,254 sqft
Garage Type	Attached
Garage Area	926 sqft
Parking Spaces	4 Parking Spaces

Location & Zoning

Street Address	320 SUMMERHILL LN
City	MARTINEZ
State	CA
Zip	94553-9709
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	A2
Legal Description	TRACT 6443 POR LOT 9
Legal Subdivision	CITY/MARTINEZ
Legal Tract	6443
Legal Lot Number	9
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	BRIONES
Census Block Group	1
Census Block	1050
Census Tract	356002

Owner

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	320 SUMMERHILL LN, MARTINEZ, CA 94553-9709
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
May 31, 2023	Deed of Trust, Mortgage · Line of Credit FLAGSTAR BANK FSB
Jan 13, 2023	Deed of Trust, Mortgage · Line of Credit JACKSON FLAGSTAR CENTRE OFFICE
Aug 21, 2020	Deed of Trust, Mortgage · Conventional Mortgage OWNING CORPORATION

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Feb 7, 1997 · Amount on Record
Deed Sale	Feb 7, 1997 · Amount on Record
Deed Document Number	199721184
Last Transfer Date	Jan 26, 2009
Transfer Doc	0000019664
Record Updated	Sep 20, 2026

May 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	320 SUMMERHILL LN, MARTINEZ, CA 94553-9709
Transaction Type	Mortgage
Record Updated	Jun 8, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	320 SUMMERHILL LN, MARTINEZ, CA 94553-9709

Mortgage

Document Number	0000051290
Date	May 31, 2023
Instrument	2023-051290

Lender

Name	FLAGSTAR BANK FSB
Type	Bank
Address	TROY, MI 48098

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	357 Months
Due	Feb 1, 2053

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

January 2023: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	320 SUMMERHILL LN, MARTINEZ, CA 94553-9709
Transaction Type	Mortgage
Record Updated	Jun 8, 2026

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	320 SUMMERHILL LN, MARTINEZ, CA 94553-9709

Mortgage

Document Number	0000003493
Date	Jan 13, 2023
Instrument	2023-003493

Lender

Name	JACKSON FLAGSTAR CENTRE OFFICE
Type	Bank
Address	TROY, MI 48098

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	361 Months
Due	Feb 1, 2053

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

August 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	320 SUMMERHILL LN, MARTINEZ, CA 94553-9709
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	ORANGE COAST TITLE SAN JOSE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000177560
Date	Aug 21, 2020
Instrument	2020-177560

Lender

Name	OWNING CORPORATION
Type	Non-Lending Institution
Address	ORANGE, CA 92868

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Sep 1, 2050

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	Martinez Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$1,196,349 (+2%) Land $365,466 Building $830,883
2025	$13,911.00 (+6.41%) Homeowner's exemption	$1,172,892 (+4.04%) Land $358,300 Building $814,592
2023	$13,073.00 (+1.75%) Homeowner's exemption	$1,127,349 Land $344,388 Building $782,961
2022	$12,848.00

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
Flood Insurance Cost	Premium on Record median of 14 policies
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	14 in force
Nearby Flood Claims	1 (2023)
Most Recent Claim	Jan 2023 · Severe Winter Storms, Flooding, Landslides, And Mudslides

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	High above 80% of the US · above 57% of California
Wildfire Likelihood	0.6% annual chance
Exposure	Direct burnable vegetation

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	CITY OF MARTINEZ serves 31,015 people · EPA ID CA0710006
Water Source	Purchased surface water from CONTRA COSTA WATER DISTRICT
Last State Inspection	Oct 2025
Lead	Under 1 ppb (2023–2025) 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 38 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
AT&T Fiber	5,000 / 5,000
Xfinity Cable	2,000 / 250
Unwired Fixed Wireless	300 / 25
Verizon Fixed Wireless	300 / 20
T-Mobile Fixed Wireless	100 / 20

Cell Coverage

5G (outdoors only) and 4G LTE

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