Kosl Building Group

Kosl Building Group is a construction company in Mamaroneck, NY, developing high-end homes throughout Westchester County, New York and Greenwich, Connecticut. The company handles turnkey new construction, covering property acquisitions, plan design, land-use approvals, financing solutions, and construction management for residential clients. Services extend to luxury single family homes, high-end multifamily apartments, and transitional senior housing residencies, serving both prospective buyers and capital partners. Kosl Building Group holds a rating of 4.50 from customer reviews. The company was founded by president Bobby Ben-Simon over 35 years ago, who brought a background in engineering, architecture, and real estate brokerage to establish the business as a luxury residential developer in Westchester County. The company's portfolio includes Traditional and Modern homes, with properties available as vacant land for custom building or as completed homes. Kosl Building Group also offers virtual tours of luxury homes, interiors, and amenities, along with before-and-after project showcases and exclusive VIP property tours. The office sits on Mamaroneck Avenue, a short walk from Mamaroneck Avenue School and roughly two-tenths of a mile from the New England Thruway and Columbus Park. The Mamaroneck train station is about a third of a mile away. As a long-established luxury developer in Westchester County with decades of work behind it, Kosl Building Group continues to shape the high-end residential market in Mamaroneck and the surrounding region.