21 Bay 3rd Street 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.