There are many organisations that have interests and responsibilities for many buildings in London. Information is available on their websites. These include: National Trust;  English Heritage;  the Preservation of Rural England;  Museum of London;  Design Museum; and then there are the London Festival of Architecture;  New London Architecture;  and Open House.

Explain about Listed Buildings?

There are a number of professional bodies and trade associations related to the built environment located in the greater London area or having active Branches including: Association for Project Management (APM);  Chartered Institute of Building (CIOB);  Chartered Institute of Building Services Engineers (CIBSE);  Institute of Civil Engineers (ICE);  Royal Institute of British Architects (RIBA);  Royal Institute of Chartered Surveyors (RICS); and other members of Construction Industry Council (CIC).