21 Bay 3rd Street Islip, NY $ 599,995
21 Bay 3rd Street
$ 599,995
Recently Listed
Open House 8/9 12pm - 2pm
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21 Bay 3rd Street

Islip, NY, 11751
$ 599,995
Bedrooms2 Baths1.0 Sq 1,188

Monthly Estimate*

$ 3,788

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Single Family Home for sale in Islip, NY

for $599,995 with 2 bedrooms and 1 full bath. This 1,188 square foot home was built in 1929 on a lot size of 0.146.

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.

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Open House

8/9/2026 12:00 PM - 2:00 PM
21 Bay 3rd Street Islip, NY
* Some states or local ordinances may prohibit Open Houses at this time, please confirm with your Weichert agent or local rep to confirm

Single Family Active

Price

$ 599,995

Bedrooms

2

Full Bath

1

Property Type

Single Family

Taxes

$ 10,711

Style

Cape Cod

Lot Size

0.146

Year Built

1929

Town/City

Islip

County/Region

Suffolk

MLS | Web ID

1023939

Features
Interior
Interior Amenities First Floor Full Bath Entrance Foyer Formal Dining Galley Type Kitchen Low Flow Plumbing Fixtures Original Details Washer/Dryer Hookup
Basement Full Partially Finished
Flooring Wood
Basement Features Full Partially Finished
Basement (Y/N) Y
Fireplace Y/N N
Half Baths 0
Total Bedrooms 2
Total Baths 1
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General
Sewer Public Sewer
Heating Hot Water Natural Gas Steam
Cooling Ductless
Utilities Electricity Connected Natural Gas Connected Sewer Available Trash Collection Public Water Connected
Appliances Convection Oven Cooktop Dryer Gas Cooktop Gas Oven Oven Range Refrigerator Washer Gas Water Heater
Garage Spaces 1
Architectural Style Cape Cod
Construction Materials Frame
Year Built 1929
Property Subtype Single Family Residence
Tax Year 2025
Parcel Number 0500-397-00-02-00-017-000
County Suffolk County
Property Type Residential
HOA N
Subdivision Name St. Marks
Facing Direction South
Garage Y/N Y
Total Rooms 6
Full Baths 1
High School Islip High School
City Islip
Disclosures Seller Property Disclosure
Senior Community Y/N N
High School District Islip
Carport Y/N N
Elementary School Maud S Sherwood Elementary School
Property Attached Y/N N
Tax Annual Amount 10711
Middle/Junior High School Islip Middle School
Property Condition Actual
Building Area Units Square Feet
Standard Status Active
Middle/Junior School District Islip
Elementary School District Islip
Tax Assessed Value 29650
Tax Lot 17
Year Built Effective 2021
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Exterior
Parking Features Detached Driveway Garage Off Street Detached Driveway Garage Off Street
Water Source Public
Foundation Details Concrete Perimeter
Spa N
Building Area Total 1436
Waterfront Y/N N
Road Frontage Type Municipal
Horse Y/N N
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Internal Only
Street Number 1 21
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* Excluded Features
List By
Steven J. Rainone CBR SRES

Listing Agent

Netter Real Estate Inc

Broker

631-661-5100

Contact

Affordability Calculator

$4,681
Per Month
81%
19%
0%
Monthly Principal & Interest
$3,788
Monthly Property Taxes
$893
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
4099957 Elementary School
4101461 Middle School
Islip High School High School
Pricing History
DatePricePrice ChangeDescription
8/6/2026$599,995 Listed Price

Map


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21 Bay 3rd Street, Islip, NY, 11751 is a Single Family Home for sale at $599,995 with 1,188 sqft and a lot size of 0.146. 21 Bay 3rd Street has 2 bedrooms, 1.0 baths, and was built in 1929. The property's zip code is 11751 which is in Islip, NY