4511 Grothman Ln, Martinez, CA 94553 Property Records

Contra Costa County property record for 4511 Grothman Ln, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 1,528 sqft · built 1947
Lot Size	0.49 acres (21,344 sqft)
Owner	Trust Name on File
Last Sale	$760,000 (Jul 2019)
Tax Bill	$10,662 (2025)
Deeds & Mortgages	Jul 2019 Transfer Jul 2019 Sale + 3 more
Flood Zone	Zone AO (high risk)
APN	`162-242-035-2`

Property Details

APN / Parcel Number

Primary APN	`162-242-035-2`
Alternative APN	`162-242-035`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	6 Rooms
Stories	1 Story
Building Area	1,528 sqft Living Area
1st Floor Area	1,528 sqft

Exterior

Year Built	Built 1947
Effective Year Built	Effective 1969
Lot Area	21,344 sqft (0.49 acres)
Garage Type	Attached
Garage Area	572 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	4511 GROTHMAN LN
City	MARTINEZ
State	CA
Zip	94553-4411
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R10
Legal Description	POR RO EL PINOLE
Legal Subdivision	RO EL PINOLE
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3002
Census Tract	321103

Owner

4511 Grothman Ln is owner-occupied and held in a trust since July 2019.

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

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

Owner of Record	Trust Name on File
Mailing Address	4511 GROTHMAN LN, MARTINEZ, CA 94553-4411
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

Deeds, Mortgages & Sale History

Date	Document
Jul 11, 2019	Quit Claim Deed, Transfer CHICAGO TITLE COMPANY, CHICAGO TITLE CO
Jul 11, 2019	Grant Deed, Transfer CHICAGO TITLE COMPANY, CHICAGO TITLE CO
Jul 11, 2019	Quit Claim Deed, Transfer CHICAGO TITLE COMPANY, CHICAGO TITLE CO
Oct 19, 2018	Quit Claim Deed, Transfer ATTORNEY ONLY
Oct 19, 2018	Affidavit of Death, Transfer ATTORNEY ONLY

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jul 11, 2019 · Amount on File
Deed Sale	Jul 11, 2019 · Amount on File
Deed Document Number	2019106799
Prior Transfer Date	Jul 8, 2019
Prior Transfer Doc	0000106798
Record Updated	Oct 29, 2026

July 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jul 11, 2019
Property Address	4511 GROTHMAN LN, MARTINEZ, CA 94553-4411
Document Number	0000106798
Instrument Date	Jul 8, 2019
Instrument	106798
Transaction Type	Transfer
Record Updated	Jul 17, 2019
Title Company	CHICAGO TITLE COMPANY, CHICAGO 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	4105 NE 37TH AVE VANCOUVER WA 986613103, VANCOUVER, WA 98661-3103

July 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jul 11, 2019
Property Address	4511 GROTHMAN LN, MARTINEZ, CA 94553-4411
Document Number	0000106799
Instrument Date	Jul 8, 2019
Instrument	106799
Transaction Type	Transfer
Record Updated	Jul 17, 2019
Title Company	CHICAGO TITLE COMPANY, CHICAGO TITLE CO

Transaction

Amount	Amount on Record
Tax	$836.00
Amount Accuracy	Full Value
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	2064 LOS ANGELES AVE BERKELEY CA 947072457, BERKELEY, CA 94707-2457

July 2019: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Jul 11, 2019
Property Address	4511 GROTHMAN LN, MARTINEZ, CA 94553-4411
Document Number	0000106797
Instrument Date	Jul 8, 2019
Instrument	106797
Transaction Type	Transfer
Record Updated	Jul 17, 2019
Title Company	CHICAGO TITLE COMPANY, CHICAGO 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	7407 SW HUNT CLUB DR PORTLAND OR 972239436, PORTLAND, OR 97223-9436

October 2018: Quit Claim Deed, Transfer

Document Type	Quit Claim Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Oct 19, 2018
Property Address	4511 GROTHMAN LN, MARTINEZ, CA 94553-4411
Document Number	0000166135
Instrument Date	Oct 12, 2018
Instrument	166135
Transaction Type	Transfer
Record Updated	Oct 30, 2018
Title Company	ATTORNEY ONLY

Transaction

Tax	$0.00
Additional	Quitclaim Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Joint Tenants with Right of Survivorship
Address	4511 GROTHMAN LN MARTINEZ CA 945534411, MARTINEZ, CA 94553-4411

October 2018: Affidavit of Death, Transfer

Document Type	Affidavit of Death
Jurisdiction	CONTRA COSTA CA
Recording Date	Oct 19, 2018
Property Address	4511 GROTHMAN LN, MARTINEZ, CA 94553-4411
Document Number	0000166134
Instrument Date	Oct 12, 2018
Instrument	166134
Transaction Type	Transfer
Record Updated	Oct 30, 2018
Title Company	ATTORNEY ONLY

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	4511 GROTHMAN LN MARTINEZ CA 945534411, MARTINEZ, CA 94553-4411

Tax Assessment & Valuation

The 2025 property tax bill for 4511 Grothman Ln was $10,662 with a homeowner's exemption.

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		$847,787 (+2%) Land $536,115 Building $311,672
2025	$10,662.00 Homeowner's exemption	$831,164 Land $525,603 Building $305,561
2023	$10,012.00 (+1.69%) Homeowner's exemption	$798,892 Land $505,195 Building $293,697
2022	$9,846.00

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

Flood

FEMA maps place 4511 Grothman Ln in Zone AO, a high-risk flood area; flood insurance is required for federally backed loans.

Source: FEMA National Flood Hazard Layer, effective October 12, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone AO high risk · sheet flow 1–3 ft
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	Varies along the reach; see FIRM
Flood Insurance Requirement	Required federally backed loans
Flood Insurance Cost	Premium on File median of 27 policies
Nearby Flood Policies	27 in force
Nearby Flood Claims	21 (1982–2023)
Claims Outside the SFHA	3 of 21
Most Recent Claim	Jan 2023 · Severe Winter Storms, Flooding, Landslides, And Mudslides
Claims by Event	Severe Winter Storms, Flooding, Landslides, And Mudslides, Jan 2023 · 2 claims Severe Storms, Flooding, Mud And Landslides, Jan 1997 · 4 claims Severe Winter Storms, Flooding, Landslides, Mud Flows, Jan 1995 · 4 claims

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

Wildfire risk around 4511 Grothman Ln is moderate, ranking above 57% of the US, with a 0.1% annual chance of wildfire.

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

Wildfire Risk	Moderate above 57% of the US · lower than 66% of California
Wildfire Likelihood	0.1% annual chance
Exposure	Indirect within ember reach
Adjoins Burnable Land	Yes

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

Provider	Max Down / Up (Mbps)
Xfinity Cable	2,000 / 250
AT&T Fixed Wireless · DSL	100 / 20

May also be available: Astound Broadband, T-Mobile, Unwired, Verizon.

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