Interior Alterations, also known as IAI, is a New York-based construction management and general contracting firm that specializes in town house renovations. Operational for more than 30 years, the company provides a variety of project management, supervision, and demolition and excavation services. It offers masonry, underpinning, structural framing and plumbing solutions. The company also provides wood flooring, restoration, and structural waterproofing and roofing options. In addition, it offers installation services for electrical and audiovisual equipment. The company provides services for heating, ventilating and air conditioning systems. Its projects include residential apartments and museums. The company works with subcontractors. Interior Alterations manages a staff of over 35 people.