A trio of Upper East Side townhouses — billed as a megamansion in the making — are poised to hit the market asking a combined $53.4 million. Located on a prime stretch of East 81st Street between Madison and Park avenues, the adjacent parcels total 20,824 square feet, with zoning for another 4,000 square feet that could be added on to create one of the largest mansions in the city. Looking to capitalize on the […]