1655 Calle Arroyo, Diablo, CA 94528 Property Records

Contra Costa County property record for 1655 Calle Arroyo, Diablo, CA 94528

Property Summary

Property Type	Single Family Home
Details	5 bd · 4 ba · 4,677 sqft · built 1969
Lot Size	0.683 acres (29,750 sqft)
Owner	2 Company Names on Record
Last Sale	$2,850,000 (Jun 2015)
Tax Bill	$39,865 (2025)
Deeds & Mortgages	Oct 2026 Sale Oct 2026 Line of Credit + 5 more
Flood Zone	Zone X (minimal risk)
APN	`195-170-024-2`

Property Details

APN / Parcel Number

Primary APN	`195-170-024-2`
Alternative APN	`195-170-024`

Interior

Bedrooms	5 Beds
Full Baths	4 Baths
Total Rooms	11 Rooms
Stories	1 Story
Building Area	4,677 sqft Living Area
1st Floor Area	4,677 sqft

Exterior

Year Built	Built 1969
Effective Year Built	Effective 2000
Lot Area	29,750 sqft (0.683 acres)
Garage Type	Attached
Garage Area	743 sqft
Parking Spaces	3 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central

Location & Zoning

Street Address	1655 CALLE ARROYO
City	DIABLO
State	CA
Zip	94528
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R20
Legal Description	MT DIABLO EST PK#1 POR LTS 98,99&SEC ADJ
Legal Subdivision	MOUNT DIABLO ESTATE PARK 01
Legal Lot Number	98,99
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1000
Census Tract	346205

Owner

Source: Contra Costa County records, as of October 22, 2026

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

Owner of Record	2 Company Names on Record
Mailing Address	1655 CALLE ARROYO, DIABLO, CA 94528
Owner Type	Company
Vesting	Life Tenant

Deeds, Mortgages & Sale History

Date	Document
Oct 14, 2026	Grant Deed, Transfer NONE LISTED ON DOCUMENT
Oct 1, 2026	Deed of Trust, Mortgage · Line of Credit FREMONT BANK
Dec 11, 2025	Deed of Trust, Mortgage · ARM FREMONT BANK
Mar 25, 2024	Deed of Trust, Mortgage · Line of Credit FREMONT BANK
Jul 3, 2017	Deed of Trust, Mortgage · ARM FIRST REPUBLIC BANK
Dec 28, 2021	Deed of Trust, Mortgage · Line of Credit FIRST REPUBLIC BANK
Jun 21, 2017	Loan Modification, Mortgage · Conventional Mortgage HIRT MANAGEMENT INC

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Jun 25, 2015 · Amount on Record
Deed Sale	Jun 25, 2015 · Amount on Record
Prior Sale	Mar 4, 2008 · Amount on Record
Deed Document Number	2015131542
Record Updated	Oct 29, 2026

October 2026: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	CONTRA COSTA CA
Recording Date	Oct 14, 2026
Property Address	1655 CALLE ARROYO, DIABLO, CA 94528
Document Number	0000110583
Instrument Date	Oct 2, 2026
Instrument	2026110583
Transaction Type	Transfer
Record Updated	Oct 21, 2026
Title Company	NONE LISTED ON DOCUMENT

Transaction

Tax	$0.00
Amount Accuracy	Full Amount Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Life Tenant
Address	1655 CALLE ARROYO, DIABLO, CA 94528

October 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Recording Date	Oct 1, 2026
Property Address	1655 CALLE ARROYO, DIABLO, CA 94528
Document Number	0000103210
Instrument Date	Sep 29, 2026
Instrument	2026103210
Transaction Type	Mortgage
Record Updated	Oct 8, 2026
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000103210,
Date	Oct 1, 2026
Instrument	2026103210

Lender

Name	FREMONT BANK

Agreement

Type	Line of Credit
Amount	Amount Recorded

Interest

Max Rate	-1%

December 2025: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1655 CALLE ARROYO, DIABLO, CA 94528
Transaction Type	Mortgage
Record Updated	Dec 19, 2025
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1655 CALLE ARROYO, DIABLO, CA 94528

Mortgage

Document Number	0000138459
Date	Dec 11, 2025
Instrument	2025- 138459

Lender

Name	FREMONT BANK
Type	Bank
Address	2580 SHEA CENTER DR, LIVERMORE, CA 94551

Agreement

Type	ARM
Amount	Amount Recorded
Term	361 Months
Due	Jan 1, 2056

Interest

Rate Type	Adjustable Rate
Rate	7.5%
Adjustable	Adjustable Rate Rider
Type Change Date	Jan 1, 2031
Change Frequency	6 Months
Min Rate At Change	5.5%
Max Rate At Change	9.5%
Index	Other
Max Rate	12.5%

March 2024: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1655 CALLE ARROYO, DIABLO, CA 94528
Transaction Type	Mortgage
Record Updated	Apr 3, 2024
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1655 CALLE ARROYO, DIABLO, CA 94528

Mortgage

Document Number	0000027152
Date	Mar 25, 2024
Instrument	2024-027152

Lender

Name	FREMONT BANK
Type	Bank
Address	LIVERMORE, CA 94551

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	360 Months
Due	Mar 20, 2054

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

July 2017: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1655 CALLE ARROYO, DIABLO, CA 94528
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE COMPANY

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000119474
Date	Jul 3, 2017
Instrument	2017-119474

Lender

Name	FIRST REPUBLIC BANK
Type	Bank
Address	SAN FRANCISCO, CA 94111

Agreement

Type	ARM
Amount	Amount Recorded
Term	360 Months
Due	Jul 1, 2047

Interest

Rate Type	Adjustable Rate
Rate	3.55%
Type Change Date	Sep 1, 2022
Change Frequency	Monthly
Min Rate At Change	2.5%
Max Rate At Change	9.95%
Index	1-Month LIBOR

December 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1655 CALLE ARROYO, DIABLO, CA 94528
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	OLD REPUBLIC TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1655 CALLE ARROYO, DIABLO, CA 94528

Mortgage

Document Number	0000347828
Date	Dec 28, 2021
Instrument	2021-347828

Lender

Name	FIRST REPUBLIC BANK
Type	Bank
Address	SAN FRANCISCO, CA 94111

Agreement

Type	Line of Credit
Amount	Amount Recorded
Term	300 Months
Due	Dec 26, 2046

Interest

Rate Type	Adjustable Rate
Change Frequency	Monthly

June 2017: Loan Modification, Mortgage

Document Type	Loan Modification
Jurisdiction	CONTRA COSTA CA
Property Address	1655 CALLE ARROYO, DIABLO, CA 94528
Document Number	0000119475
Instrument Date	Jun 21, 2017
Transaction Type	Mortgage
Record Updated	Nov 16, 2018
Title Company	OLD REPUBLIC TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Husband and Wife
Address	1655 CALLE ARROYO DIABLO CA 94528, DIABLO, CA 94528

Mortgage

Document Number	0000119475
Date	Jul 3, 2017
Instrument	119475

Lender

Name	HIRT MANAGEMENT INC
Address	3240 STONE VALLEY RD W, ALAMO, CA 94507-1555

Agreement

Type	Conventional Mortgage
Amount	Amount Recorded
Term	24 Months
Due	Jul 2, 2019

Interest

Rate Type	Fixed Rate
Rate	5%

Tax Assessment & Valuation

Source: Contra Costa County assessment roll, as of July 14, 2026

Property Jurisdictions

Type	Name
State	California
County	Contra Costa County
Unified School District	San Ramon Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$3,594,585 (+2%) Land $1,716,237 Building $1,878,348
2025	$39,865.00 (+6.5%) Homeowner's exemption	$3,524,104 (+7.04%) Land $1,682,586 Building $1,841,518
2023	$37,432.00 (+0.79%) Homeowner's exemption	$3,292,260 Land $1,617,250 Building $1,675,010
2022	$37,139.00

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
Nearest Special Flood Hazard Area	Zone A, within 500 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on Record median of 18 policies
Community Rating System	Class 6 (20% premium discount)
Nearby Flood Policies	18 in force
Nearby Flood Claims	1 (2017)
Claims Outside the SFHA	1 of 1
Most Recent Claim	Feb 2017 · Severe Winter Storms, Flooding, 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	Moderate above 63% of the US · lower than 61% of California
Wildfire Likelihood	0.2% 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	EAST BAY MUD serves 1,468,000 people · EPA ID CA0110005
Water Source	Surface water
Last State Inspection	Dec 2021
Lead	Under 1 ppb (2022–2024) 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. This system sells water to local utilities; the supplier billing this address may be one of them.

Internet Providers

Source: FCC Broadband Data Collection, based on 130 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 DSL	100 / 20

May also be available: Etheric Networks, Verizon.

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