Category I: All original elements have been maintained in an integrated manner. These elements have special historic, cultural and scientific value.
Category II: All original elements of the front building, facade have been maintained in an integrated manner. These elements have special historic, cultural and scientific value.
Category III: The Ying-Yang tiled roofs and some original elements of the house have been maintained in situ. These elements have some special historic, cultural and scientific value.
Category IV: These houses are built in modern style using modern materials like concrete. They do not contribute cultural significance to the complex of architectural monuments in Hoi An Ancient Town.