A 20-unit apartment building in Brooklyn is being turned into a megamansion you can buy for $22 million

A 20-unit Brooklyn apartment building is about to undergo quite the renovation, and soon it will be a single-family home.

Listing for a whopping $22 million, the Brooklyn Heights building comes with a proposed layout that can include four bedrooms, four bathrooms, four powder rooms, a chef's kitchen, dining room, parlor, and an elevator.

There would also be a rooftop deck and a basement that could incorporate a gym and an 800-bottle wine cellar if the buyer so chooses.

In total, the home would have 14,000 square feet of living space.

The proposed layout is being overseen by designer Lee J. Stahl and The Renovated Home, but whoever buys the building can choose whether they want to use the plans or not.

Stahl told the Wall Street Journal that his proposal would take $10.6 million and 16 months to execute.

The building was previously owned by the Jehovah's Witnesses before it was acquired by Benchmark Properties in January.

Though there are tenants still living in the building's 20 apartments, the property will be delivered vacant to its new owner.

According to Streeteasy, one-bedroom apartments there have rented for between $2,800 and $3,150, while studios have gone for between $2,150 and $2,250. Apartments have been rented in the building as recently as August 2015.

Ryan Serhant and Bradley Mohr of Nest Seekers International have the listing.