1918 Calle Arroyo, Diablo, CA 94528 Property Records

Contra Costa County property record for 1918 Calle Arroyo, Diablo, CA 94528

Property Summary

Property Type	Single Family Home
Details	3 bd · 3.5 ba · 2,865 sqft · built 2014
Lot Size	0.47 acres (20,473 sqft)
Owner	2 Trust Names on File
Last Sale	$1,200,000 (Aug 2013)
Tax Bill	$24,066 (2025)
Deeds & Mortgages	Oct 2023 Transfer Sep 2018 Mortgage + 1 more
Flood Zone	Zone X (minimal risk)
APN	`195-210-019-4`

Property Details

APN / Parcel Number

Primary APN	`195-210-019-4`
Alternative APNs	`195-210-043` `195-210-019` `1952100434`

Interior

Bedrooms	3 Beds
Full Baths	3.5 Baths
Half Baths	1 Half Bath
Total Rooms	10 Rooms
Stories	1 Story
Building Area	2,865 sqft Living Area
1st Floor Area	2,865 sqft

Exterior

Year Built	Built 2014
Effective Year Built	Effective 2014
Lot Area	20,473 sqft (0.47 acres)
Garage Type	Attached
Garage Area	616 sqft
Parking Spaces	2 Parking Spaces

Utilities, Heating & Cooling

Cooling System	Central

Location & Zoning

Street Address	1918 CALLE ARROYO
City	DIABLO
State	CA
Zip	94528
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	R20
Legal Description	POR SEC 22 T1S R1W .47AC
Legal Range	01W
Legal Township	01S
Legal Section	22
Jurisdiction	CONTRA COSTA CA
Township / Civil Division	CENTRAL CONTRA COSTA
Census Block Group	1
Census Block	1017
Census Tract	346205

Owner

1918 Calle Arroyo is held in a trust since June 2023.

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

Owner of Record	2 Trust Names on File
Mailing Address	PO BOX 764, BOX ELDER, SD 57719-0764
Owner Type	Company
Vesting	Trust, Family 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
Oct 19, 2023	Intrafamily Transfer, Transfer
Sep 28, 2018	Deed of Trust, Mortgage · ARM UBS BANK USA
Sep 21, 2020	Deed of Trust, Mortgage · Conventional Mortgage UBS BANK USA

Assessor's Deed Record

Deed Names	2 Names on Deed
Last Sale	Aug 20, 2013 · Amount on File
Deed Sale	Aug 20, 2013 · Amount on File
Deed Document Number	2013207012
Last Transfer Date	Jun 30, 2023
Transfer Doc	0000102946
Record Updated	Sep 20, 2026

October 2023: Intrafamily Transfer, Transfer

Document Type	Intrafamily Transfer
Jurisdiction	CONTRA COSTA CA
Recording Date	Oct 19, 2023
Property Address	1918 CALLE ARROYO, DIABLO, CA 94528
Document Number	0000102946
Instrument Date	Jun 30, 2023
Instrument	2023-102946
Transaction Type	Transfer
Record Updated	Oct 27, 2023

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	Family Trust
Address	PO BOX 764, DIABLO, CA 94528-0764

September 2018: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1918 CALLE ARROYO, DIABLO, CA 94528
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	FIDELITY NATIONAL TITLE

Transferred To (Grantee/Buyer)

Name	Verified Name

Mortgage

Document Number	0000155206
Date	Sep 28, 2018
Instrument	2018-155206

Lender

Name	UBS BANK USA
Type	Bank
Address	SALT LAKE CITY, UT 84111

Agreement

Type	ARM
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2048

Interest

Rate Type	Adjustable Rate
Rate	4%
Type Change Date	Oct 1, 2028
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	9%
Index	1-Year LIBOR
Max Rate	9%

September 2020: Deed of Trust, Mortgage

Document Type	Deed of Trust
Jurisdiction	CONTRA COSTA CA
Property Address	1918 CALLE ARROYO, DIABLO, CA 94528
Transaction Type	Mortgage
Record Updated	Nov 3, 2022
Title Company	TITLE CONNECT INC

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	PO BOX 764, DIABLO, CA 94528-0764

Mortgage

Document Number	0000210022
Date	Sep 21, 2020
Instrument	2020-210022

Lender

Name	UBS BANK USA
Type	Bank
Address	SALT LAKE CITY, UT 84111

Agreement

Type	Conventional Mortgage
Amount	Amount on Record
Term	361 Months
Due	Oct 1, 2050

Interest

Rate Type	Adjustable Rate
Rate	2.87%
Type Change Date	Oct 1, 2027
Change Frequency	Annually
Min Rate At Change	2.25%
Max Rate At Change	7.87%
Index	1-Year LIBOR
Max Rate	7.87%

Tax Assessment & Valuation

The 2025 property tax bill for 1918 Calle Arroyo was $24,066.

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		$2,075,300 (+0.51%) Land $1,219,636 Building $855,664
2025	$24,066.00 Homeowner's exemption	$2,064,746 Land $1,225,859 Building $838,887
2023	$23,203.00 (+0.82%) Homeowner's exemption	$1,984,571 Land $1,178,258 Building $806,313
2022	$23,014.00

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

Flood

FEMA maps place 1918 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 1918 Calle Arroyo is moderate, ranking above 69% 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 69% of the US · above 44% of California
Wildfire Likelihood	0.3% 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 153 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: Verizon.

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