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1831 Calle Arroyo, Diablo, CA 94528 Property Records

Contra Costa County property record for 1831 Calle Arroyo, Diablo, CA 94528

Property Summary

Property TypeSingle Family Home
Details5 bd · 5 ba · 5,722 sqft · built 1920
Lot Size0.689 acres (30,000 sqft)
Owner2 Trust Names on File
Last Sale$3,700,000 (Sep 2003)
Tax Bill$54,598 (2025)
Deeds & MortgagesMay 2026 Sale
Flood ZoneZone X (minimal risk)
APN195-180-017-4

Property Details

APN / Parcel Number

Primary APN195-180-017-4
Alternative APN
  • 195-180-017

Interior

Bedrooms5 Beds
Full Baths5 Baths
Total Rooms13 Rooms
Stories2 Stories
Building Area5,722 sqft Living Area
1st Floor Area4,037 sqft
2nd Floor Area1,685 sqft
Fireplaces1 Fireplace
FireplaceFireplace

Exterior

Year BuiltBuilt 1920
Effective Year BuiltEffective 1999
Roof MaterialComposition Shingle
Lot Area30,000 sqft (0.689 acres)
Garage TypeAttached
Garage Area696 sqft
Parking Spaces2 Parking Spaces
Deck AreaDeck Area

Utilities, Heating & Cooling

Cooling SystemCentral
Heating SystemForced Air with A/C
Heating FuelGas
SewerMunicipal
Water SourceCommercial

Location & Zoning

Street Address1831 CALLE ARROYO
CityDIABLO
StateCA
Zip94528
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeR20
Legal DescriptionMT DIABLO EST PARK #1 POR LOT 83
Legal SubdivisionMOUNT DIABLO ESTATE PARK 01
Legal Lot Number83
JurisdictionCONTRA COSTA CA
Township / Civil DivisionCENTRAL CONTRA COSTA
Census Block Group1
Census Block1000
Census Tract346205

Owner

1831 Calle Arroyo is owner-occupied and held in a trust since September 2003.

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

Owner of Record2 Trust Names on File
Mailing Address1831 CALLE ARROYO, DIABLO, CA 94528
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust, 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

Assessor's Deed Record

Deed Names2 Names on Deed
Last SaleSep 3, 2003 · Amount on File
Deed SaleSep 3, 2003 · Amount on File
Prior SaleFeb 25, 2000 · Amount on File
Deed Document Number2003437000
Prior Transfer DateNov 3, 1994
Prior Transfer Doc0000281185
Record UpdatedOct 29, 2026

May 2026: Grant Deed, Transfer

Document TypeGrant Deed
JurisdictionCONTRA COSTA CA
Recording DateMay 28, 2026
Property Address1831 CALLE ARROYO, DIABLO, CA 94528
Document Number0000055283
Instrument DateMay 11, 2026
Instrument202655283
Transaction TypeTransfer
Record UpdatedAug 29, 2026
Title CompanyNONE LISTED ON DOCUMENT

Transaction

Tax$0.00
Amount AccuracyFull Amount Stated
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipFamily Trust
Address1831 CALLE ARROYO, DIABLO, CA 94528

Tax Assessment & Valuation

The 2025 property tax bill for 1831 Calle Arroyo was $54,598.

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

Property Jurisdictions

TypeName
StateCalifornia
CountyContra Costa County
Unified School DistrictSan Ramon Valley Unified School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed Value
2026$4,933,000 (+0.98%) Land $2,266,512 Building $2,666,488
2025$54,598.00 Homeowner's exemption$4,885,000 Land $2,244,458 Building $2,640,542
2023$48,942.00 (+9.52%) Homeowner's exemption$4,350,000 Land $1,998,647 Building $2,351,353
2022$44,688.00

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

Flood

FEMA maps place 1831 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 ZoneZone X
minimal risk
Nearest Special Flood Hazard AreaZone A, within 100 ft
Flood Insurance RequirementNot required
lenders may require it
Flood Insurance CostPremium on File
median of 18 policies
Community Rating SystemClass 6 (20% premium discount)
Nearby Flood Policies18 in force
Nearby Flood Claims1 (2017)
Claims Outside the SFHA1 of 1
Most Recent ClaimFeb 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 1831 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 RiskModerate
above 69% of the US · above 44% of California
Wildfire Likelihood0.3% annual chance
ExposureDirect
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 SystemEAST BAY MUD
serves 1,468,000 people · EPA ID CA0110005
Water SourceSurface water
Last State InspectionDec 2021
LeadUnder 1 ppb (2022–2024)
action level 15 ppb

Violations Reported to EPA

Water QualityNone
last 10 years
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
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

ProviderMax 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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