Largest Residential Property on Long Island
The largest single-family home on Long Island is the Fair Field estate in the Hamptons, located in the Village of Sagaponack. The property spans roughly 63,000 square feet of living space across multiple structures, with extensive gardens, orchards, and guest facilities. It is widely cited as the biggest house on Long Island by square footage and total acreage combined Forbes.
The estate sits on a multi-acre parcel that includes a main residence, a guesthouse, a carriage house, and support buildings. The main house features dozens of bedrooms, multiple kitchens, a large indoor pool, a library, and high-end entertainment spaces. The grounds include landscaped lawns, sports courts, and private roads, reflecting a compound-style layout common among ultra-large estates.
Owner, Price, and Transaction History
The property was assembled and developed by Ira Rennert, a billionaire investor and chairman of Renco Group, a diversified holding company involved in mining, metals, and industrial operations. The total cost of the estate is estimated to have exceeded $200 million when all land acquisitions and construction were completed, making it one of the most expensive residential projects in the region Forbes Real Estate Council.
While the property has not been publicly listed for sale in recent years, its valuation has been tracked by luxury real estate analysts and local tax records. The estate's assessed value and annual property taxes are closely watched as indicators of ultra-high-net-worth residential trends on Long Island. Comparable sales in the Hamptons often serve as benchmarks for valuing such large properties The New York Times.
Location, Access, and Regional Context
The estate is situated in Sagaponack, a village within the Town of Southampton, which is known for its concentration of large luxury homes and privacy-focused compounds. The property is accessed via private roads and is set back from public thoroughfares, with security and gated access typical of high-profile estates in the area LuxuryRealEstate.com.
Long Island's North Shore and eastern Suffolk County remain hubs for oversized residential properties, with several estates exceeding 30,000 square feet. The biggest house on Long Island stands out not only for its size but also for the combination of land area, construction scale, and ownership profile. Regional zoning and land-use regulations continue to shape how large estates are developed and taxed across the island Nassau County Government.