Hangzhou historic houses are artifacts, buildings, or districts in Hangzhou, China, which have been legally declared to be "protected". According to the "Regulations of historic districts and historic buildings in Hangzhou" effectivated from 1 January 2005, historic buildings are those artifacts or districts that have lasted more than 50 years, and are of significant value for history, science, and art. In Hangzhou, declaring a historic house requires consulting the urban planning administration bureau, and the real estate administration bureau.