GOSHEN, N.Y. — As Modernist buildings reach middle age, many of the stark structures that once represented the architectural vanguard are showing signs of wear, setting off debates around the country between preservationists, who see them as historic landmarks, and the many people who just see them as eyesores.

The conflict has come in recent months to this quaint village 60 miles north of New York City — with its historic harness-racing track, picturesque Main Street and Greek Revival, Federal and Victorian houses — where the blocky concrete county government center designed by the celebrated Modernist architect Paul Rudolph has always been something of a misfit.

“I just don’t think it fits with the character of the county seat and the village of Goshen,” said Leigh Benton, an Orange County legislator who grew up in the area. “I just thought it was a big ugly building.”

Completed in 1967, the building has long been plagued by a leaky roof and faulty ventilation system and, more recently, by mold; it was closed last year after it was damaged by storms, including Tropical Storm Irene.