21 Commack Rd, Mastic Beach, NY 11951 Property Records

Suffolk County and Brookhaven Town property record for 21 Commack Rd, Mastic Beach, NY 11951

Property Summary

Property Type	Single Family Home
Lot Size	0.23 acres (10,019 sqft)
Owner	Company Name on File
Tax Bill	$9,428 (2024)
Deeds & Mortgages	Jan 2019 Sale & Mortgage
Flood Zone	Zone X (minimal risk)
APN	`0200-978.90-11.00-024.000`

Property Details

APN / Parcel Number

Primary APN	`0200-978.90-11.00-024.000`
Alternative APNs	`472289 978.90-11-024.000` `0209021000400024000` `00004720120` `4720120`

Exterior

Lot Area	10,019 sqft (0.23 acres)
View / Lot	Waterfront

Location & Zoning

Account Number	4720120
Street Address	21 COMMACK RD
City	MASTIC BEACH
State	NY
Zip	11951-3401
Property Category	Residential
Property Type	Residential > Single Family > Home
Legal Block	8901
Legal Lot Number	100
Jurisdiction	SUFFOLK NY
Township / Civil Division	BROOKHAVEN
Census Block Group	2
Census Block	2025
Census Tract	159518

Owner

21 Commack Rd, a single family home, is owned by a company.

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

Owner of Record	Company Name on File
Mailing Address	1359 N OCEAN AVE, MEDFORD, NY 11763-3540
Owner Type	Company
Vesting	Company

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 Names	Name on Deed
Record Updated	Sep 20, 2026

January 2019: Grant Deed, Transfer

Document Type	Grant Deed
Jurisdiction	SUFFOLK NY
Recording Date	Jan 17, 2019
Property Address	21 COMMACK RD, MASTIC BEACH, NY 11951-3401
Document Number	0129970285
Book / Page	012997 / 000285
Instrument Date	Jan 10, 2019
Transaction Type	Transfer
Record Updated	Nov 27, 2019
Title Company	NOT AVAILABLE

Transaction

Amount	Amount on Record
Downpayment	Downpayment on Record
Loan-to-Value (LTV)	LTV on Record
Tax	$1,000.00
Amount Accuracy	Confirmed
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Relationship	Company
Address	1359 N OCEAN AVE MEDFORD NY 117633540, MEDFORD, NY 11763-3540

Mortgage

Document Number	229970292
Date	Jan 17, 2019
Book Page	022997/000292

Lender

Name	CORTCO INC
Address	3 SLEEPY HOLLOW CT, LAKE GROVE, NY 11755-2615

Agreement

Type	Conventional with PMI
Amount	Amount on Record

Tax Assessment & Valuation

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

Property Jurisdictions

Type	Name
State	New York
County	Suffolk County
County Subdivision	Brookhaven Town
Unified School District	William Floyd Union Free School District (PK - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025		$2,300 Land $300 Building $2,000	$479,167 Land $56,604 Building $377,358
2024	$9,428.00
2023		$2,300 Land $300 Building $2,000	$4,260 Land $556 Building $3,704

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

Flood

FEMA maps place 21 Commack Rd in Zone X, an area of minimal flood risk.

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

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	8 in force

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 21 Commack Rd is low, with less than a 0.01% annual chance of wildfire.

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

Wildfire Risk	Low lower than 96% of the US · lower than 95% of New York
Wildfire Likelihood	Under 0.01% annual chance
Exposure	None beyond ember reach

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	SUFFOLK COUNTY WATER AUTHORITY serves 1,100,000 people · EPA ID NY5110526
Water Source	Groundwater
Last State Inspection	Jan 2024
Lead	1 ppb (2025–2027) action level 15 ppb

Violations Reported to EPA

Water Quality	Asbestos resolved · Jul 2020
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.

Internet Providers

Source: FCC Broadband Data Collection, based on 460 locations within half a mile, as of December 31, 2025

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