





In Cohen’s home office (shown here), a spiral walkway wraps around a floor-to-ceiling scratching post. His cats, all mutts, climb up the pole and walk down the spiral. “I thought maybe the cats would just look at it, but they use it all,” he says. “It’s like a freeway sometimes with them all over the place.”



After a home remodel in the 1990s, Cohen began constructing catwalks and tunnels for his feline companions. The intricate and artistic platforms and walkways allow the cats to climb, jump and crawl through the house, and they even connect to various litter boxes — 24 of them — which are concealed in closets with fans and the garage. “The house is designed not to smell, and it doesn’t,” he says.Cohen got the idea for his catwalks after picking up a mini book called, by Bob Walker. “I thought, ‘I’m a builder. I could do that,’” he says. When there was downtime at his building firm, Trillium Enterprises , Cohen traded tools with carpenters and had them come to his house to design and build the additions.