171 Mount Tam Ct, Martinez, CA 94553 Property Records

Contra Costa County property record for 171 Mount Tam Ct, Martinez, CA 94553

Property Summary

Property Type	Single Family Home
Details	3 bd · 2 ba · 1,148 sqft · built 1978
Lot Size	0.174 acres (7,560 sqft)
Owner	2 Individual Names on File
Last Sale	$965,000 (Sep 2025)
Tax Bill	$3,531 (2025)
Deeds & Mortgages	Sep 2025 Sale & Mortgage Feb 2022 Reverse Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`155-402-003`

Property Details

APN / Parcel Number

Primary APN	`155-402-003`
Alternative APN	`155-402-003-0`

Interior

Bedrooms	3 Beds
Full Baths	2 Baths
Total Rooms	8 Rooms
Stories	1 Story
Building Area	1,148 sqft Living Area
1st Floor Area	1,148 sqft

Exterior

Year Built	Built 1978
Effective Year Built	Effective 1987
Lot Area	7,560 sqft (0.174 acres)
Garage Type	Attached
Garage Area	472 sqft
Parking Spaces	2 Parking Spaces

Location & Zoning

Street Address	171 MOUNT TAM CT
City	MARTINEZ
State	CA
Zip	94553-5840
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R75
Legal Description	T04957 L0096 B
Legal Subdivision	4957 ALHAMBRA HILLS
Legal Tract	04957
Legal Lot Number	96
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3004
Census Tract	321102

Owner

171 Mount Tam Ct is owned and occupied by two individuals who bought it in September 2025.

Source: Contra Costa County records, as of August 21, 2026

Owner of Record	2 Individual Names on File
Mailing Address	171 MOUNT TAM CT, MARTINEZ, CA 94553-5840
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Community Property

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
Sep 29, 2025	Grant Deed, Transfer · Conventional Mortgage CROSSCOUNTRY MORTGAGE LLC
Feb 1, 2022	Intrafamily Transfer, Transfer · Reverse Mortgage AMERICAN ADVISORS GROUP
May 20, 2019	Deed of Trust, Mortgage · FHA Mortgage COMMISSIONER/HSNG & URBAN DEV
May 20, 2019	Deed of Trust, Mortgage · FHA Mortgage AMERICAN ADVISORS

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Sep 29, 2025 · Amount on File
Deed Sale	Sep 29, 2025 · Amount on File
Deed Document Number	2025101680
Prior Transfer Date	Dec 7, 2021
Prior Transfer Doc	0000019073
Record Updated	Oct 29, 2026

September 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Sep 29, 2025
Property Address	171 MOUNT TAM CT, MARTINEZ, CA 94553-5840
Document Number	0000101680
Map Reference	MB 200 PG 1 - 7
Instrument Date	Sep 15, 2025
Instrument	2025- 101680
Transaction Type	Transfer
Record Updated	Oct 8, 2025
Title Company	OLD REPUBLIC TITLE, OLD REPUBLIC TITLE COMPANY

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
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	Right of Survivorship
Address	171 MOUNT TAM CT, MARTINEZ, CA 94553-5840

Mortgage

Document Number	0000101681
Date	Sep 29, 2025
Instrument	2025- 101681

Lender

Name	CROSSCOUNTRY MORTGAGE LLC
Type	Mortgage Company

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2055

February 2022: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Feb 1, 2022
Property Address	171 MOUNT TAM CT, MARTINEZ, CA 94553-5840
Document Number	0000019073
Map Reference	MB 200 PG 1-7
Instrument Date	Dec 7, 2021
Instrument	2022-019073
Transaction Type	Transfer
Record Updated	Jun 7, 2023
Title Company	FNC TITLE OF CALIFORNIA

Transaction

Tax	$0.00
Amount Accuracy	Transfer Tax Exempt
Additional	Intrafamily Transfer

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	171 MOUNT TAM CT, MARTINEZ, CA 94553-5840

Mortgage

Document Number	0000019074
Date	Feb 1, 2022
Instrument	2022-019074

Lender

Name	AMERICAN ADVISORS GROUP
Type	Mortgage Company

Agreement

Type	Reverse Mortgage
Amount	Amount on Record
Term	844 Months
Due	Jun 2, 2092

Interest

Rate Type	Adjustable Rate
Rate	2.4%
Adjustable	Adjustable Rate Rider
Type Change Date	Feb 1, 2022
Change Frequency	Monthly
Index	1-Year CMT
Max Rate	7.4%

May 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	171 MOUNT TAM CT, MARTINEZ, CA 94553-5840
Document Number	0000078157
Instrument Date	May 20, 2019
Transaction Type	Mortgage
Record Updated	Aug 27, 2019
Title Company	FNC TITLE SERVICES, FNC TITLE SVCS

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	171 MOUNT TAM CT MARTINEZ CA 945535840, MARTINEZ, CA 94553-5840

Mortgage

Document Number	0000078157
Date	May 29, 2019
Instrument	78157

Lender

Name	COMMISSIONER/HSNG & URBAN DEV
Address	451 7TH ST SW, WASHINGTON, DC 20410-0001

Agreement

Type	FHA Mortgage
Amount	Amount on Record
Term	876 Months
Due	May 28, 2092

Interest

Rate Type	Adjustable Rate
Rate	5.24%

May 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	171 MOUNT TAM CT, MARTINEZ, CA 94553-5840
Document Number	0000078156
Instrument Date	May 20, 2019
Transaction Type	Mortgage
Record Updated	Jun 6, 2019
Title Company	FNC TITLE SERVICES, FNC TITLE SVCS

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	171 MOUNT TAM CT MARTINEZ CA 945535840, MARTINEZ, CA 94553-5840

Mortgage

Document Number	0000078156
Date	May 29, 2019
Instrument	78156

Lender

Name	AMERICAN ADVISORS
Address	3800 W CHAPMAN AVENUE 3RD & 7TH F, ORANGE, CA 92868

Agreement

Type	FHA Mortgage
Amount	Amount on Record
Term	876 Months
Due	May 28, 2092

Interest

Rate Type	Adjustable Rate
Rate	5.24%

Tax Assessment & Valuation

The 2025 property tax bill for 171 Mount Tam Ct was $3,531.

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		$965,000 (+328.3%) Land $665,000 Building $300,000
2025	$3,531.00 Homeowner's exemption	$225,309 Land $66,106 Building $159,203
2023	$3,314.00 (+1.53%) Homeowner's exemption	$216,562 Land $63,540 Building $153,022
2022	$3,264.00

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

FEMA maps place 171 Mount Tam Ct in Zone X, an area of minimal flood risk, though there have been 2 flood claims nearby since 1982.

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	2 (1982–1995)
Claims Outside the SFHA	1 of 2
Most Recent Claim	Jan 1995 · Severe Winter Storms, Flooding, Landslides, Mud Flows

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 171 Mount Tam Ct is low, with a 0.06% annual chance of wildfire.

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

Wildfire Risk	Low lower than 64% of the US · lower than 79% of California
Wildfire Likelihood	0.06% annual chance
Exposure	None beyond 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 329 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 Fixed Wireless	100 / 20
AT&T Fixed Wireless · DSL	100 / 20

May also be available: Astound Broadband, Verizon.

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