520 D St, Martinez, CA 94553 Property Records

Contra Costa County property record for 520 D St, Martinez, CA 94553 · Last verified July 2026

Property Summary

Property Type	Single Family Home
Details	2 bd · 1 ba · 981 sqft · built 1930
Lot Size	0.122 acres (5,310 sqft)
Owner	2 Individual Names on File
Last Sale	$543,000 (Oct 2025)
Tax Bill	$4,350 (2025)
Deeds & Mortgages	Oct 2025 Sale & Mortgage
Flood Zone	Zone AO (high risk)
APN	`370-241-007-1`

Property Details

APN / Parcel Number

Primary APN	`370-241-007-1`
Alternative APN	`370-241-007`

Interior

Bedrooms	2 Beds
Full Baths	1 Bath
Total Rooms	6 Rooms
Stories	1 Story
Building Area	981 sqft Living Area
1st Floor Area	981 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1930
Effective Year Built	Effective 1930
Architectural Style	Bungalow
Exterior Material	Stucco
Roof Material	Composition Shingle
Lot Area	5,310 sqft (0.122 acres)
Garage Type	Attached
Garage Area	360 sqft
Parking Spaces	1 Parking Space

Utilities, Heating & Cooling

Heating System	Floor/Wall Furnace
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	520 D ST
City	MARTINEZ
State	CA
Zip	94553-3204
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Description	CASTRO ST EXT POR LOT 6 & 7 BLK 102
Legal Subdivision	CASTRO STREET EXT
Legal Block	102
Legal Lot Number	6,7
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	3
Census Block	3009
Census Tract	318000

Owner

Source: Contra Costa County records · APN 370-241-007-1

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	520 D ST, MARTINEZ, CA 94553-3204
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Joint Tenants

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	2 Verified Names on Deed
Last Sale	Oct 07, 2025 · Amount on Record
Deed Sale	Oct 07, 2025 · Amount on Record
Prior Sale	Jun 22, 2009 · Amount on Record
Deed Document Number	2025104724
Prior Transfer Date	Aug 24, 2004
Prior Transfer Doc	0000336017
Record Updated	Sep 20, 2026

October 2025: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Oct 07, 2025
Property Address	520 D ST, MARTINEZ, CA 94553-3204
Document Number	0000104724
Map Reference	MB 12 PG 271
Instrument Date	Sep 30, 2025
Instrument	2025- 104724
Transaction Type	Transfer
Record Updated	Oct 21, 2025
Title Company	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	520 D ST, MARTINEZ, CA 94553-3204

Mortgage

Document Number	0000104725
Date	Oct 07, 2025
Instrument	2025- 104725

Lender

Name	NEXERA HOLDING LLC
Type	Mortgage Company
Address	2100 POWELL ST # 730, EMERYVILLE, CA 94608

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	361 Months
Due	Nov 01, 2055

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	Martinez 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		$543,000 (+84.14%) Land $400,000 Building $143,000
2025	$4,350.00 (+6.51%) Homeowner's exemption	$294,880 (+4.04%) Land $251,105 Building $43,775
2023	$4,084.00 (+1.59%) Homeowner's exemption	$283,431 Land $241,355 Building $42,076
2022	$4,020.00

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Contra Costa County (06013C), updated October 12, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 060133180003, refreshed September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition (2024), fuels as of 2020 · Last verified October 2026

Flood

FEMA Flood Zone	Zone AO sheet flow 1–3 ft
Special Flood Hazard Area	Yes
Flood Hazard	High
100-Year Floodplain	Yes 1% annual chance
Floodway	No
Base Flood Elevation	Varies along the reach; see FIRM
Flood Insurance Requirement	Required (federally backed mortgages)
Flood Insurance Cost	Premium on Record median of 109 individual NFIP policies nearby
Nearby Flood Policies	109 in force 82 of 109 on primary residences
Nearby Flood Claims	32 (1980–2019)
Claims Outside the SFHA	3 of 32
Most Recent Claim	Feb 2019
Flood Events	Severe Storms, Flooding, Mudslides, And Landslides (Jan 2006), 12 claims Severe Storms, Flooding, Mud And Landslides (Jan 1997), 5 claims Severe Storms, Flood, Mudslides & High Tide (Jan 1982), 6 claims

Wildfire

Wildfire Risk	Moderate above 60% of the US · above 36% of California
Wildfire Likelihood	About 1 in 610 per year
Exposure	Indirect 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.