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21 Bay 3rd Street

21 Bay 3rd Street, Islip, NY, 11751

$599,995

active

Bedrooms

Bathrooms

Sq Ft

1,188

Lot Size

6,098 sqft

Year Built

1929

Garage

1 car

Type

Single Family

Monthly Cost

Estimate. Actual payment depends on credit, lender, taxes, and insurance.

$4,211/month estimated

Principal & interest: $3,193
Property tax: $893
Home insurance (est.): $125

Down payment %Interest rate %Term (years)

Down payment: $119,999 · Loan amount: $479,996

Description

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.

Features

✓ First Floor Full Bath
✓ Entrance Foyer
✓ Formal Dining
✓ Galley Type Kitchen
✓ Low Flow Plumbing Fixtures
✓ Original Details
✓ Washer/Dryer Hookup

Appliances

✓ Convection Oven
✓ Cooktop
✓ Dryer
✓ Gas Cooktop
✓ Gas Oven
✓ Oven
✓ Range
✓ Refrigerator
✓ Washer
✓ Gas Water Heater

Property Details

Cooling: Ductless
Heating: Hot Water, Natural Gas, Steam
Basement: Full, Partially Finished

Schools

Elementary

Maud S Sherwood Elementary School

Islip

Middle

Islip Middle School

Islip

High

Islip High School

Islip

Location

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Map of 21 Bay 3rd Street, Islip, NY, 11751

Listed by Steven J. Rainone CBR SRES, Netter Real Estate Inc

MLS# KEY1023939631-661-5100

Listings courtesy of OneKey® MLS as distributed by MLS GRID

Based on information submitted to the MLS GRID as of Aug 6, 2026, 1:15 PM UTC (date and time MLS GRID Data was obtained). All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

IDX information is provided exclusively for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. The data is deemed reliable but is not guaranteed by MLS GRID.

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