Sinvin Realty announced the leasing of a five-story TriBeCa loft building at 62 White Street between Broadway and Franklin Place. The 5,000 s/f space is being leased by ? What If! The Innovation Company, who is finishing the last two years of a 10-year lease. Michelle Stone, managing director at Sinvin Realty, was the sole broker in the lease assignment and represented ? What If! and the assignor, Selldorf Architects. The landlord, Blumberg Properties, LLC, represented itself.