21 Flagg Ave

Montauk, NY 11954

$2,490,000
Price
3
Beds
1,400 Sq. Ft.
$1,779 / Sq. Ft.
1,400
Sq. Ft.
$1,779
per Sq. Ft.
Listed By CompassActive Under Contract
Listed By CompassActive Under Contract

Description

This stylish and sunlit beach retreat is located in the coveted Ditch Plains neighborhood-just steps from the ocean and one of Montauk's most iconic surf spots. With three cozy bedrooms and two full bathrooms, the home is designed for a relaxed coastal lifestyle. The fully equipped kitchen features sleek stainless steel appliances, and the open living room offers a bright, inviting atmosphere with expansive glass walls and a fireplace. In 2025, the home underwent significant upgrades, including a...This stylish and sunlit beach retreat is located in the coveted Ditch Plains neighborhood-just steps from the ocean and one of Montauk's most iconic surf spots. With three cozy bedrooms and two full bathrooms, the home is designed for a relaxed coastal lifestyle. The fully equipped kitchen features sleek stainless steel appliances, and the open living room offers a bright, inviting atmosphere with expansive glass walls and a fireplace. In 2025, the home underwent significant upgrades, including a new roof, new skylights, upgraded insulation, a new Bilco door, and improvements to the foundation and crawl space-along with the installation of a dehumidifier system for enhanced comfort and efficiency. After a day at the beach, rinse off in the outdoor shower, then unwind in the private, fenced-in yard-perfect for lounging or outdoor games. A front deck and back patio provide ideal spaces to soak up the sun or enjoy meals al fresco. And with the beach just a short stroll away, there's no need to worry about parking-simply walk out and embrace the Ditch Plains surf and sand.

Property Details for 21 Flagg Avenue

Architectural Style
Beach House
Water access
false
LISTING UPDATED: 12/06/2025 07:27 PM

Property Details for 21 Flagg Avenue

StatusActive Under Contract
MLS #390182
Days on Market48
Taxes$5,120 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeSingle Family
MLS TypeResidential / Single Family Residence
Year Built1965
Lot Size0.17 AC
CountySuffolk County

Location

Listing Courtesy of: .

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Building Information for 21 Flagg Avenue

Stories1Year Built1965Building Size-Lot Size0.17 AC

Payment Calculator

$12,731 per month

30 year fixed, 6.28% Interest

Principal and Interest

$12,304

Property Taxes

$427

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for 21 Flagg Avenue

Summary
Location and General Information
  • City: Montauk
  • Coordinates: -71.915476, 41.044042
  • Latitude: 41.044042
  • Longitude: -71.915476
  • Amenity names: OHA,Crawl,Outdoor Shower(s),Primary Bedroom on First Floor,Bathroom on First Floor,None / Mainland,Fireplace,Basement,Heat
  • Cul de sac location: false
  • Near jitney sunrise bus line: false
  • Near train station: false
  • Title: DITCH PLAINS - MOMENTS TO THE OCEAN SHORE
  • Unit type: Single-Family
  • Year Built: 1965
Taxes and HOA
  • Tax Annual Amount: $5,120
  • Tax Map Number: 0300030000400006000
Property
Lot Information
  • Building Area Total: 1400.0
  • Living Area: 1400.0
  • Lot Size Acres: 0.17
  • Corner lot: false
  • Lot with trees: false
Property and Assessments
  • Property Sub Type: Single Family Residence
  • Property Type: Residential
Utilities
  • Water Source: Town
Interior and Exterior Features
Interior Features
  • Bathrooms Full: 2
  • Bathrooms Total Decimal: 2.0
  • Bedrooms Total: 3
  • Fireplaces Total: 1
Exterior Features
  • New Construction: No
  • Stories: 1

Public Records for 21 Flagg Avenue

Taxable ValueLand$400Additions$4,100Total$4,500
Home Facts
Beds0Lot Size7,405 SqFtStyleSingle Family ResidenceCountySUFFOLKAPN0300-030.00-04.00-006.000

Schools near 21 Flagg Avenue

This home is within Montauk Union Free School District.
Rating
School
Type
Grades
Distance
Montauk School
Public - PK to 8
Rating
School
Distance
Montauk School
PublicPK to 8

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity.

All data is deemed reliable but is not guaranteed accurate by Compass. See Terms of Service for additional restrictions. Compass · Tel: 212-913-9058 · New York, NY