YIT Oyj engages in the provision of construction services. It operates through the following segments: Housing Finland and Central and Eastern European Countries (CEE); Housing Russia; Business Premises; Infrastructure; Partnership Properties; and Other Items. The Housing Finland & CEE segment constructs and develops apartments and entire residential areas. The Housing Russia includes construction and development operations in Russia. The Business Premises segment consists of business premises construction, project development, and commercial property and facilities management businesses. The Partnership Properties segment business premises and hybrid projects¿ project development businesses and real estate services such as renting and real estate management. The Infrastructure segment comprises of road and street construction and maintenance, bridge building and repairing, railway construction, hydraulic and foundation engineering, underground construction, excavation, other earthworks and public utilities as well as wind power park development and contracting. The Other Items segment refers to group internal services, rental revenue from external customers, and group level unallocated costs. The company was founded in 1912 and is headquartered in Helsinki, Finland.