Two-time NBA basketball champ, Kevin Durant, who just joined the Brooklyn Nets, has leased a dramatic office space in a petite, brand-new building for his company, Thirty Five Ventures.

The 6’ 10” forward — who retired his longtime No. 35 jersey and is now wearing No. 7 for the Nets — is leasing the penthouse at the newly developed 112 Seventh Ave. building on the southwest corner of West 17th St.

The lease includes the full third floor, which comes with 4,500 square feet and a private roof deck. The design of the all glass-and-steel boutique project of just 17,068 square feet creates a building-within-a-building for Durant’s company, which will also have a private lobby and elevator.

Co-founded by Durant and his business partner Rich Kleiman, Thirty Five Ventures oversees their numerous businesses, which bounce across sports, tech, media and philanthropy.

Current projects include The Boardroom, a multi-platform sports business/culture-focused vertical distributed by ESPN; the basketball-themed series “Swagger” starring Winston Duke through a venture with Imagine Entertainment and Apple; an equity partnership with audio company Master & Dynamic for his Studio 35 headphones; and the Durant Center, an educational and leadership facility in Durant’s hometown in Prince George’s County, Md.

Todd Stracci and Hal Stein of Newmark Knight Frank represented Durant’s Thirty Five Ventures in the search for office space.

The boutique project is being developed by Aurora Capital Associates, A&H Acquisitions and Extell.

Brett Harvey of JLL represented the owners, who had an asking rent of $105 per square foot.

The 12,000 square feet of retail below has been leased to the Winnipeg, Canada- based furnishings company EQ3 for its flagship.

The asking rent was $400 per square foot for the ground floor.

The building is scheduled to open in 2020.