West Coast-based NBA player Jonathan “J.J.” Redick, of the Los Angeles Clippers, is in contract to buy a $4.25 million duplex penthouse in Brooklyn.

It’s at 51 Jay St., a warehouse in Dumbo that’s being converted to 74 luxury condos.

The three-bedroom, four-bathroom unit is 2,058 square feet. Redick, who studied history and cultural anthropology at Duke, will feel right at home in the artsy neighborhood. His father, a stoneware potter, even gave him the middle name “Clay.”

The loft-like space comes with casement windows and its own private terrace.

High-end details include oak herringbone floors and a large chef’s kitchen with marble slab countertops and Gaggenau appliances.

The master suite features a spa-like bathroom with a walk-in shower and soaking tub.

Building amenities include a children’s playroom, bike and resident storage, a pet washing and grooming station, a gym with a yoga room, a resident’s lounge, a roof terrace and a landscaped central courtyard.

The listing broker is Deborah Brener Zolan, of Halstead. Robin Schneiderman, director of new business development for Halstead Property Development Marketing, declined to comment.