Dorian Lam, a principal at title company Cornerstone Land Abstract, said closing in escrow has become the way 95 percent of his firm’s residential deals are closing now. That said, he noted that deal volume has dropped about 50 percent over the past two weeks. The remaining 5 percent of Cornerstone’s residential deals are continuing to close in-person, which is legal because financial services were deemed essential under Gov. Andrew Cuomo’s stay-at-home order.