1733 Calle Arroyo, Diablo, CA 94528 Property Records

Contra Costa County property record for 1733 Calle Arroyo, Diablo, CA 94528

Property Summary

Property Type	Single Family Home
Details	5 bd · 4.5 ba · 4,531 sqft · built 1964
Lot Size	0.84 acres (36,590 sqft)
Owner	2 Trust Names on File
Tax Bill	$34,553 (2025)
Deeds & Mortgages	Jul 2026 Line of Credit Nov 2021 Mortgage + 2 more
Flood Zone	Zone X (minimal risk)
APN	`195-170-017-6`

Property Details

APN / Parcel Number

Primary APN	`195-170-017-6`
Alternative APN	`195-170-017`

Interior

Bedrooms	5 Beds
Full Baths	4.5 Baths
Half Baths	1 Half Bath
Total Rooms	12 Rooms
Stories	2 Stories
Building Area	4,531 sqft Living Area
1st Floor Area	4,191 sqft
2nd Floor Area	340 sqft
Fireplaces	1 Fireplace
Fireplace	Fireplace

Exterior

Year Built	Built 1964
Effective Year Built	Effective 1980
Architectural Style	Contemporary
Exterior Material	Stucco
Construction Type	Frame
Roof Material	Tile
Lot Area	36,590 sqft (0.84 acres)
View / Lot	Woodland
Garage Type	Attached
Garage Area	732 sqft
Parking Spaces	3 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central
Heating System	Forced Air with A/C
Heating Fuel	Gas
Sewer	Municipal
Water Source	Commercial

Location & Zoning

Street Address	1733 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 LOTS 92-95 .84 AC
Legal Subdivision	MOUNT DIABLO ESTATE PARK SUB 1
Legal Lot Number	92-95
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1000
Census Tract	346205

Owner

1733 Calle Arroyo is owner-occupied and held in a trust since February 2010.

Source: Contra Costa County records, as of October 12, 2026

Owner of Record	2 Trust Names on File
Mailing Address	PO BOX 6, DIABLO, CA 94528-0006
Occupancy	Owner Occupied
Owner Type	Company
Vesting	Trust

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
Jul 24, 2026	Deed of Trust, Mortgage · Line of Credit BANK OF AMERICA
Nov 22, 2021	Deed of Trust, Mortgage · Conventional Mortgage BANK OF AMERICA NA
Feb 11, 2021	Deed of Trust, Mortgage · Conventional Mortgage BANK OF AMERICA NA
Jul 15, 2019	Deed of Trust, Mortgage BANK OF AMERICA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Feb 10, 2010
Deed Sale	Feb 10, 2010
Prior Sale	Apr 21, 1995 · Amount on File
Deed Document Number	201027442
Record Updated	Oct 29, 2026

July 2026: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Recording Date	Jul 24, 2026
Property Address	1733 CALLE ARROYO, DIABLO, CA 94528
Document Number	0000077864
Instrument Date	Jul 14, 2026
Instrument	202677864
Transaction Type	Mortgage
Record Updated	Jul 31, 2026
Title Company	NONE LISTED ON DOCUMENT

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Living Trust, 189
Address	1733 CALLE ARROYO, DIABLO, CA 94528

Mortgage

Document Number	0000077864,
Date	Jul 24, 2026
Instrument	202677864

Lender

Name	BANK OF AMERICA

Agreement

Type	Line of Credit
Amount	Amount on Record
Term	360 Months
Due	Jul 14, 2056

Interest

Rate	6.47%
Max Rate	-1%

November 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1733 CALLE ARROYO, DIABLO, CA 94528
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	NORTH AMERICAN TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	1733 CALLE ARROYO, DIABLO, CA 94528

Mortgage

Document Number	0000321639
Date	Nov 22, 2021
Instrument	2021-321639

Lender

Name	BANK OF AMERICA NA
Type	Bank
Address	CHARLOTTE, NC 28255

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Dec 1, 2051

Interest

Rate Type	Adjustable Rate
Rate	2%
Type Change Date	Dec 1, 2031
Change Frequency	6 Months
Min Rate At Change	2.75%
Max Rate At Change	7%
Index	Other
Max Rate	7%

February 2021: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1733 CALLE ARROYO, DIABLO, CA 94528
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	TITLE CONNECT INC SANTA

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000043739
Date	Feb 11, 2021
Instrument	2021-043739

Lender

Name	BANK OF AMERICA NA
Type	Bank
Address	CHARLOTTE, NC 28255

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Mar 1, 2051

Interest

Rate Type	Adjustable Rate
Rate	2.5%
Type Change Date	Mar 1, 2031
Change Frequency	Annually
Min Rate At Change	1.87%
Max Rate At Change	7.5%
Index	1-Year CMT
Max Rate	7.5%

July 2019: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1733 CALLE ARROYO, DIABLO, CA 94528
Document Number	0000112788
Instrument Date	Jul 15, 2019
Transaction Type	Mortgage
Record Updated	Jul 25, 2019
Title Company	TITLE SERVICE AND LIAISON COMPANIES, SIMPLIFILE LC E-RECORDING

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Revocable Trust
Address	1733 CALLE ARROYO DIABLO CA 94528, DIABLO, CA 94528

Mortgage

Document Number	0000112788
Date	Jul 19, 2019
Instrument	112788

Lender

Name	BANK OF AMERICA
Type	Bank
Address	101 S TRYON ST, CHARLOTTE, NC 28280-0002

Agreement

Amount	Amount on Record
Term	360 Months
Due	Jul 18, 2049

Interest

Rate Type	Adjustable Rate
Rate	3.37%

Tax Assessment & Valuation

The 2025 property tax bill for 1733 Calle Arroyo was $34,553 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
Unified School District	San Ramon Valley Unified School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value
2026		$3,094,092 (+2%) Land $1,645,794 Building $1,448,298
2025	$34,553.00 Homeowner's exemption	$3,033,424 Land $1,613,524 Building $1,419,900
2023	$33,334.00 (+0.8%) Homeowner's exemption	$2,915,634 Land $1,550,870 Building $1,364,764
2022	$33,071.00

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

Flood

FEMA maps place 1733 Calle Arroyo in Zone X, an area of minimal flood risk, within 100 ft of a high-risk flood zone.

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 100 ft
Flood Insurance Requirement	Not required lenders may require it
Flood Insurance Cost	Premium on File 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

Wildfire risk around 1733 Calle Arroyo is moderate, ranking above 67% of the US, with a 0.3% annual chance of wildfire.

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

Wildfire Risk	Moderate above 67% of the US · above 42% of California
Wildfire Likelihood	0.3% 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	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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