21 Bay 3rd Street, Islip, NY 11751

Islip
Local realty services provided by:Bon Anno Realty ERA Powered
21 Bay 3rd Street,Islip, NY 11751
$599,995
  • 2 Beds
  • 1 Baths
  • 1,188 sq. ft.
  • Single family
  • Active
Listed by: steven j. rainone cbr sres, maryann rainone
Office: netter real estate inc
MLS#:1023939
Source:OneKey MLS

Price summary

  • Price:$599,995
  • Price per sq. ft.:$417.82

About this home

Welcome to this charming 1930 Cape Cod located mid-block in the desirable St. Marks neighborhood south of Montauk Highway. Filled with character and thoughtful updates, this home features original built-ins in the kitchen, dining room, and primary bedroom, hardwood floors in the living and dining room, and a beautifully renovated bathroom with classic octagon ceramic tile. Four energy-efficient split units provide heating and air conditioning, complemented by smart thermostats, a new gas heating system, separate hot water heater, and 200-amp electric service. Flexible bonus spaces offer the perfect home office and playroom/Den. Enjoy front and rear in-ground sprinklers, low taxes, and an unbeatable location just minutes from Islip Beach, the marina, parks, shopping, restaurants, and the Long Island Railroad. A wonderful opportunity to own a home that blends timeless charm with today's modern conveniences.

Contact an agent

contact an agent

Yes, I would like more information. Please use and/or share my information with an ERA®  affiliated agent to contact me about my real estate needs. By clicking Send message, I request to be contacted by phone or text message and consent to being contacted by automated means. I understand that my consent to receive calls or texts is not a condition of purchasing any property, goods, or services. Alternatively, I understand that I can access real estate services by email or I can contact the agent myself.

If an ERA®  affiliated agent is not available in the area where I need assistance, I agree to be contacted by a real estate agent affiliated with another brand owned or licensed by Anywhere Real Estate (BHGRE® , CENTURY 21® , Coldwell Banker® , Corcoran® , Sotheby's International Realty® ). I acknowledge that I have read and agree to theTerms of useandPrivacy notice

Home facts

  • Year built:1929
  • Subdivision & Development:St. Marks
  • Listing ID #:1023939
  • Added:8 day(s) ago
  • Updated:August 14, 2026 at 11:19 AM

Rooms and interior

  • Bedrooms:2
  • Total bathrooms:1
  • Full bathrooms:1
  • Rooms Total:6
  • Dining Description:Formal Dining
  • Kitchen Description:Cooktop, Galley Type Kitchen, Oven, Range, Refrigerator
  • Basement:Yes
  • Basement Description:Full, Partially Finished
  • Living area:1,188 sq. ft.

Heating and cooling

  • Cooling:Ductless
  • Heating:Hot Water, Natural Gas, Steam

Structure and exterior

  • Year built:1929
  • Building area:1,188 sq. ft.
  • Lot area:0.15 Acres
  • Architectural Style:Cape Cod
  • Construction Materials:Frame
  • Levels:2 Story

Schools

  • High school:Islip High School
  • Middle school:Islip Middle School
  • Elementary school:Maud S Sherwood Elementary School

Utilities

  • Water:Public
  • Sewer:Public Sewer, Sewer Available

Finances and disclosures

  • Price:$599,995
  • Price per sq. ft.:$417.82
  • Tax amount:$10,711 (2025)

Features and amenities

  • Appliances:Cooktop, Dryer, Oven, Refrigerator, Washer
  • Laundry features:Dryer, Washer, Washer/Dryer Hookup
  • Amenities:Entrance Foyer

Parking

  • Parking description:Detached, Driveway, Garage, Off Street
  • Garage:Yes
  • Garage spaces:1
Copyright 2026 OneKey MLS. All rights reserved. Listings courtesy of OneKey MLS as distributed by MLS GRID <lastMLSCheckTimestamp>. OneKey MLS provides content displayed here (“provided content”) on an “as is” basis and makes no representations or warranties regarding the provided content, including, but not limited to those of non-infringement, timeliness, accuracy, or completeness. Individuals and companies using information presented are responsible for verification and validation of information they utilize and present to their customers and clients. OneKey MLS will not be liable for any damage or loss resulting from use of the provided content or the products available through Portals, IDX, VOW, and/or Syndication. Recipients of this information shall not resell, redistribute, reproduce, modify, or otherwise copy any portion thereof without the expressed written consent of OneKey MLS.

New listings near 21 Bay 3rd Street