Presents the first of three publications concerned with refurbishment. States it is estimated that currently 8 million m2 of office space requires refurbishment, much of it constructed in reinforced concrete. Argues these buildings have the potential to provide the standards of accommodation required in the 21st century if refurbished in the correct manner. Notes there are many factors influencing the refurbishment of concrete buildings, and this Guide presents the main issues from an owner/occupier or developer's viewpoint. Presents cost summarises and illustrative case studies. Also provides useful contextual information for structural and building services engineers and architects. Notes that much of the information is common to buildings other than offices.