(FORTUNE Small Business) – Mark Ward's most prized possession is a 100-ton mound of vintage greenhouse parts. That collection of glass, forged-iron fittings, and cypress lumber, along with his craftsmanship, have made Ward, 51, a leader in the brisk business of greenhouse restoration. Once found mainly at commercial nurseries, high-end greenhouses today are coveted by homeowners who value beauty as much as function. "They're the stuff of fantasy," says Ward, based in Concord, Mass. He likens his customers to "people who would choose a wooden boat over a fiberglass one." Ward usually works alone and takes his time: He completes only five greenhouses a year and charges as much as $200,000. Lately he has found a sideline: selling antique parts from his inventory to folks who want to build their own. --ED WELLES