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503 Ralph Ave, Central Islip, NY 11722 Property Records

Suffolk County and Islip Town property record for 503 Ralph Ave, Central Islip, NY 11722

Property Summary

Property TypeSingle Family Home
Details1,920 sqft · built 1962
Lot Size0.45 acres (19,602 sqft)
OwnerIndividual Name on File
Last Sale$430,000 (Sep 2023)
Deeds & MortgagesSep 2023 Sale & Mortgage
Dec 2019 Construction Loan
Flood ZoneZone X (minimal risk)
APN472889 97.-1-17

Property Details

APN / Parcel Number

Primary APN472889 97.-1-17
Alternative APNs
  • 0500-097.00-01.00-017.000
  • 288909700000010170000000
  • 472800214300
  • 300260

Interior

Building Area1,920 sqft Living Area
1st Floor Area960 sqft
Basement Area960 sqft

Exterior

Year BuiltBuilt 1962
Effective Year BuiltEffective 1962
Lot Area19,602 sqft (0.45 acres)
Lot Dimensions200 ft deep x 100 ft wide
Garage TypeAttached
Garage Area420 sqft

Location & Zoning

Account Number300260
Street Address503 RALPH AVE
CityCENTRAL ISLIP
StateNY
Zip11722-1921
Property CategoryResidential
Property TypeResidential > Single Family > Home
Local Zoning CodeAA
Legal DescriptionX2216697Y208153 T011H00000000
Legal SubdivisionMAP OF MOTOR PARKWAY ACREAGE
Legal Block7000
Legal Lot Number100
JurisdictionSUFFOLK NY
Township / Civil DivisionISLIP
Census Block Group3
Census Block3006
Census Tract145703

Owner

Source: Suffolk County and Islip Town records · APN 472889 97.-1-17

Assessment roll updated August 11, 2026 · Last verified August 2026

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

Owner of RecordIndividual Name on File
Mailing Address8 COOLIDGE AVE, AMITYVILLE, NY 11701-2460
Owner TypeIndividual
VestingIndividual(s)

Deeds, Mortgages & Sale History

DateDocument
Sep 26, 2023Deed, Transfer · Stand-Alone First Mortgage
MLB RESIDENTIAL LENDING LLC
Dec 09, 2019Trustee's Deed, Construction Loan · Construction Mortgage
ARNOLD BLUME

Assessor's Deed Record

Deed NamesVerified Name on Deed
Last SaleSep 26, 2023 · Amount on Record
Deed SaleSep 26, 2023 · Amount on Record
Prior SaleDec 09, 2019 · Amount on Record
Deed Book / Page13219 / 967
Prior Transfer DateJun 01, 1999
Record UpdatedSep 20, 2026

September 2023: Deed, Transfer

Document TypeDeed
JurisdictionSUFFOLK NY
Recording DateSep 26, 2023
Property Address503 RALPH AVE, CENTRAL ISLIP, NY 11722-1921
Document Number0132190967
Book / Page13219 / 967
Instrument DateAug 11, 2023
Transaction TypeTransfer
Record UpdatedMar 12, 2024
Title CompanyMISC COMPANY

Transaction

AmountAmount Recorded
DownpaymentDownpayment on File
Loan-to-Value (LTV)LTV on Record
Tax$0.00
Amount AccuracyFull Amount Stated
Additional
  • Arm's Length

Transferred From (Grantor/Seller)

NameVerified Name

Transferred To (Grantee/Buyer)

NameVerified Name
Address8 COOLIDGE AVE, AMITYVILLE, NY 11701-2460

Mortgage

Document Number0023538603
DateSep 26, 2023
Instrument23538/603
Lender
NameMLB RESIDENTIAL LENDING LLC
Agreement
TypeStand-Alone First Mortgage
AmountAmount Recorded

December 2019: Trustee's Deed, Construction Loan

Document TypeTrustee's Deed
JurisdictionSUFFOLK NY
Recording DateDec 09, 2019
Property Address503 RALPH AVE, CENTRAL ISLIP, NY 11722-1921
Document Number0230860006
Book / Page023086 / 000006
Instrument DateSep 25, 2019
Transaction TypeConstruction Loan
Record UpdatedJan 20, 2020
Title CompanyNOT AVAILABLE

Transferred To (Grantee/Buyer)

NameVerified Name
RelationshipCompany
Address305 VICTORY DR RONKONKOMA NY 117793741, RONKONKOMA, NY 11779-3741

Mortgage

Document Number230860006
DateDec 09, 2019
Book Page023086/000006
Lender
NameARNOLD BLUME
Address17313 SE 122ND CT, SUMMERFIELD, FL 34491-1830
Agreement
TypeConstruction Mortgage
AmountAmount Recorded
Term12 Months
DueDec 08, 2020

Tax Assessment & Valuation

Source: Suffolk County and Islip Town records · Assessment roll updated August 11, 2026 · Last verified August 2026

Property Jurisdictions

TypeName
StateNew York
CountySuffolk County
County SubdivisionIslip Town
Unified School DistrictCentral Islip Union Free School District (PK - 12)

Tax Bill & Assessment History

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

YearAssessed ValueAssessed Market Value
2025$38,200 (-) Land $10,200 Building $28,000
2024$538,028 (+2.54%) Land $143,662 Building $394,366
2023$38,200 Land $10,200 Building $28,000$524,725 Land $140,110 Building $384,615

Flood & Wildfire

Source: FEMA National Flood Hazard Layer, Suffolk County (36103C), as of September 18, 2026 · FEMA OpenFEMA NFIP redacted claims and policies, census block group 361031457033, as of September 2026 · USDA Forest Service Wildfire Risk to Communities, 2nd edition, as of 2020 · Last verified October 2026

Flood

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies1 in force
Nearby Flood Claims6 (1978–1981)
Claims Outside the SFHA6 of 6
Most Recent ClaimFeb 1981 · rainfall accumulation

Wildfire

Wildfire RiskLow
lower than 99.1% of the US · lower than 99.2% of New York
Wildfire LikelihoodUnder 0.01% annual chance
ExposureNone
beyond 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.

Internet Providers

Source: FCC Broadband Data Collection as of December 31, 2025 · Last verified October 2026

ProviderMax Down / Up (Mbps)
Optimum Communications
Fiber · Cable		8,000 / 8,000
Verizon
Fiber		2,300 / 2,300
T-Mobile USA
Fixed Wireless		100 / 20

Based on FCC filings for 384 locations within half a mile of this property.

Drinking Water

Source: EPA Safe Drinking Water Information System, water system NY5110526, as of 2026 Q3 · EPA water system boundaries as of March 2026 · Last verified October 2026

Water SystemSUFFOLK COUNTY WATER AUTHORITY
serves 1,100,000 people
Water SourceGroundwater
Last State InspectionJan 2024
Lead1 ppb (2025–2027)
action level 15 ppb

Violations Reported to EPA

Water QualityAsbestos
resolved · Jul 2020
Treatment and ProcedureNone
last 10 years
Monitoring and ReportingNone
last 3 years

Results are for the whole water system as reported to EPA, not water tested at this address; lead at the tap also depends on the building's own pipes. The full violation and enforcement history is in the system's EPA record.

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