Saying it’s too expensive to maintain and insure a vacant, antique house in northeastern New Canaan, the property’s owners on Monday filed an application to demolish it. The first taxing district of Norwalk has no immediate plans for the ca. 1750-built house and 4-acre property it owns at 1124 Valley Road, according to James Fulton, an attorney who serves as trustee for the district. “If someone offers us enough money, they can buy the whole property with the house on it, too,” Fulton told NewCanaanite.com. “But for the amount of money that some people think the property is worth and are willing to pay, it is actually worth more to the district to keep it for its future use.