David Hunt, a New York-based realtor, works extensively with developer Anton-Cerrone Associates, which has developed a specialty in renovating old buildings for high-tech use. The current market, he says, is very receptive to this particular kind of reuse. And new wiring technology is making the transformation easier. "Today, every building is wired, so that's a bit of a non-issue," he says. "The green technology we're using includes more efficient light fixtures and all of that.