The construction industry comprises a wide range of activities involving building, alteration, and/or repair. Examples include residential construction, commercial construction, bridge erection, roadway paving, excavations, demolitions, and large scale painting jobs. Residential construction refers to the building or renovation of single-family dwellings. The vast majority of residential construction jobs are small renovations, such as addition of a room or renovation of a bathroom or kitchen. Commercial construction includes apartments, office and retail buildings, hotels, schools, public buildings, industrial and manufacturing buildings, highways and bridges, sewers, pipelines, power lines, power plants, and other civil engineering projects.