Demolition contractors dismantle or remove buildings, structures and parts of structures to prepare sites for redevelopment, alteration or safe clearance. Work may involve full demolition, partial demolition, internal soft stripping, dismantling steelwork and removing garages, extensions, chimneys or other structures. Before work begins, contractors typically assess the site, identify structural risks and plan how to protect neighbouring properties, workers and the public. Services can include arranging utility disconnections and carrying out work in stages where a building must remain partly in use. Methods range from mechanical demolition using excavators and other plant to careful dismantling by hand, depending on the structure, location and project requirements. Contractors may also remove foundations, clear the site, sort materials for reuse or recycling, and dispose of demolition waste through appropriate routes.