A close-knit New York hamlet is bracing itself — for the invasion of the “Wall Street bros.”

The most expensive home for sale in sleepy Atlantic Beach, Long Island, has just listed for $11.5 million. Indeed, this marks the biggest number seen for the chiefly laid-back area — though probably not for long.

However, as Wall Street is set to return to a full five-day work week, the Hamptons is starting to seem pretty far away.

This part of the island, with a lowly population of nearly 1,800, comes with all the perks of the Hamptons — right on the water, for starters — and it’s just a breezy hour away from the city and away from the crowds.

Rarely do homes list in this area. Currently, only 15 properties are on the market.

Many financiers are eyeing properties such as this one, where they envision quick year-round weekend trips to escape the hustle and bustle of the city.

Enzo Morabito and Thomas Tripodi with Douglas Elliman hold the listing.

“Atlantic Beach is the Hamptons without the commute,” Tripodi told The Post. (And, after all, the trek to the Hamptons in the peak season routinely comes with frustrating traffic jams.) “You can live on the water, seconds from the beach, and yet close enough to the city that you can commute on a Tuesday or every day.”

Tom and Cass Justice, 35, just opened their coffee shop and vintage boutique at 2001 Park Street in Atlantic Beach.

“It definitely has the possibility of becoming the Hamptons,” Tom, 34, told The Post.

“It has private beaches, beach clubs, there’s homes for sale, yachts slips,” added Tom, who was born and raised there and recently moved back with his wife and two kids after leaving the corporate rat race in Manhattan.

When asked if he’s at all concerned about Wall Streeters invading his hometown gem, Tom was circumspect: “Well, I am a business owner, so business begets business — but as a local I can understand how people can get concerned.”

However, he admitted that “there are more boutiques and stores coming here, also — so it screams potential.”

The current real estate market certainly seems to agree with them.

“Prices here have almost doubled since COVID and now the return to a normal in-office work week is driving another rush of buyers who prize convenience,” Tripodi hyped to The Post. “Some are looking to live here full-time, others want a second or third home that’s closer than the Hamptons, and they all share the same problem: There isn’t enough inventory for the amount of buyers there are.”

On a double, bay-front lot, this six-bedroom, six-bathroom estate is on the market for the first time since 2006.

Occupying 7,000 square feet, it last traded hands for $2.33 million.

Ever since, many renovations and updates have taken place.

Features include a 140-foot floating dock, a pool and spa, a pool deck and a state-of-the-art home theater.

“This exquisite property offers breathtaking water views and the idyllic Hamptons lifestyle, all within an easy commute,” the listing notes.

Other features include a private guest suite.

The master suite boasts wide views.

“There are myriad reasons to buy this house. It’s beautiful, has a great layout, all the right amenities, and so on. But if I had to pick the two features that will win over our buyer it’s the perfect beachfront location near the city and the rare ability to keep a yacht,” Morabito told The Post.

“[The property at] 139 Bayside Drive is a double lot so you can have an 80-foot boat and many others for running around the bay. You’re in protected water, just a five-minute ride out into the ocean. You can’t find that anywhere.”

Lifelong resident Gerard Foster, proprietor of Boardwalk Bagel & Delicatessen at 105 Putnam Blvd., agreed that the waterfront is key.

“The beach — we love the beach. There is no beach like here,” Foster, 54, told The Post. “Everyone is neighborly. More people are staying here yearly than just seasonly. Everybody knows everybody here.”