In Cổ Loa, old wooden houses still exist in Nhồi, Gà, Mạch Tràng hamlets, but they are most concentrated in Nhồi, especially “Nhồi Dưới”. The remaining traditional houses date from the second half of the 19th century to the first half of the 20th century, the architecture of the late Nguyen Dynasty (under the reigns of King Tự Đức, Thành Thái, Khải Định and Bảo Đại). The old houses in Nhồi Dưới hamlet belong to some big families such as Hoàng Thị Mậu's house built in Khải Định 3 (1918); Hoàng Văn Vượng's house was built in Thành Thái 7 (1895); Mr. Hoàng Công Thỉnh 's house was built in Bảo Đại year 15 (1940); Trương Thị Tún's house was built in Bảo Đại year 14 (1939).

The traditional houses in Cổ Loa all have a common feature of 5 compartments, facing the South. When building a house, homeowners often write on the truss or rafters about the year of construction. In the house, in addition to common items, there are many pairs of parallel sentences, Chinese characters made of gilded wood or plaster on the wall.

An old house in Cổ Loa