The Agència de l’Habitatge de Catalunya (AHC), created by Law 13/2009, is a key tool for managing public housing policies in Catalonia. It focuses on housing promotion, social programs, and rehabilitation. AHC manages a social housing stock of 14,727 dwellings and has extensive experience in retrofitting buildings, completing over 400 refurbishment projects, 20% related to building envelope improvements. As a regional legislator, public housing manager, and renovation promoter, AHC plays a vital role in Spain. It is a member of SACE and the subcommission for building quality under the Ministry of Housing. The agency influences housing policies, private sector discussions, and best practices through its networks and associations. AHC also analyzes data from various sources to drive policy changes and promote sustainable housing solutions.