21 Mark Dr, Smithtown, NY 11787 Property Records

Suffolk County and Smithtown Town property record for 21 Mark Dr, Smithtown, NY 11787

Property Summary

Property TypeSingle Family Home
Details4 bd · 2.5 ba · 2,226 sqft · built 1960
Lot Size0.53 acres (23,087 sqft)
Owner2 Company Names on Record
Tax Bill$11,903 (2024)
Flood ZoneZone X (minimal risk)
APN473489 100.-3-25

Property Details

APN / Parcel Number

Primary APN473489 100.-3-25
Alternative APNs
  • 0800-100.00-03.00-025.000
  • 348910000000030250000000
  • 47340024126

Interior

Bedrooms4 Beds
Full Baths2.5 Baths
Half Baths1 Half Bath
Stories2 Stories
Building Area2,226 sqft Living Area
Gross Area2,732 sqft
1st Floor Area1,253 sqft
2nd Floor Area973 sqft

Exterior

Year BuiltBuilt 1960
Effective Year BuiltEffective 1960
Architectural StyleColonial
Exterior MaterialWood
Lot Area23,087 sqft (0.53 acres)
View / LotSuburban
Garage TypeAttached
Garage Area506 sqft
Parking Spaces2 Parking Spaces
Pool Area512 sqft
PorchOpen Porch
Porch Area576 sqft

Utilities, Heating & Cooling

Heating SystemHot Water
Heating FuelOil
SewerConnected
Water SourceCommercial

Location & Zoning

Street Address21 MARK DR
CitySMITHTOWN
StateNY
Zip11787-3335
Property CategoryResidential
Property TypeResidential > Single Family > Home
Legal Description8-317476 TC-70 *2919 SEC 1 LOT 17 FORESTWOO AT SMITHTOWN
Legal Block3
Legal Lot Number25
JurisdictionSUFFOLK NY
Township / Civil DivisionSMITHTOWN
Census Block Group3
Census Block3005
Census Tract134909

Owner

Source: Suffolk County and Smithtown Town records, as of August 11, 2026

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

Owner of Record2 Company Names on Record
Mailing Address21 MARK DR, SMITHTOWN, NY 11787-3335
OccupancyOwner Occupied
Owner TypeCompany
VestingTrust, Revocable Trust

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names2 Names on Deed
Last Transfer DateJun 3, 2025
Transfer Doc0133010646
Record UpdatedSep 20, 2026

Tax Assessment & Valuation

Source: Suffolk County and Smithtown Town assessment roll, as of August 11, 2026

Property Jurisdictions

TypeName
StateNew York
CountySuffolk County
County SubdivisionSmithtown Town
Unified School DistrictSmithtown Central School District (KG - 12)

Tax Bill & Assessment History

YearTax BillAssessed ValueAssessed Market Value
2025$5,760 (-) Land $500 Building $5,260$720,000 (+10,774.49%) Land $62,500 Building $657,500
2024$11,903.00
2023$5,760 Land $500 Building $5,260$6,621 Land $575 Building $6,046

Assessed value and assessed market value are set for property tax purposes and are not market price estimates.

Flood

Source: FEMA National Flood Hazard Layer, effective September 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood ZoneZone X
minimal risk
Flood Insurance RequirementNot required
lenders may require it
Nearby Flood Policies2 in force
Nearby Flood Claims6 (2011–2024)
Most Recent ClaimAug 2024 · Severe Storm And Flooding
Claims by Event
  • Severe Storm And Flooding, Aug 2024 · 3 claims

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 RiskLow
lower than 80% of the US · above 54% of New York
Wildfire Likelihood0.01% annual chance
ExposureIndirect
within ember reach
Adjoins Burnable LandYes

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 SystemSUFFOLK COUNTY WATER AUTHORITY
serves 1,100,000 people · EPA ID NY5110526
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, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 161 locations within half a mile, as of December 31, 2025

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

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