"Seongyojang House" is located at Unjeong-dong, Gangneung-si, Gangwon-do. It is a house where Lee Nae-beon, known as a noble family of Gangneung, lived first and his descendants also resided from generation to generation and designated as Important Folklore Material No. 5 now. "Seongyojang House" consists of "Yeolhwadang," "Main Building," "Dongbyeoldang," "Hwallaejeong," etc.

"Seongyojang House" is a typical 99-part house of noble family. As a private upper-class house, it has been designated as national cultural property, continuing its reputation from generation to generation. This traditional house has been preserved well for about 300 years. This serves as a famous tourist attraction showing the house culture of the Joseon Dynasty in harmony with surrounding nature.

"Seongyojang House" serves as an important material not only for studying a building but also the residential life and culture of the Late Joseon Dynasty. In particular, its detached house "Yeolhwadang" is a tower-style building constructed on the three-storied rectangular stones, holding thousands of books and pictures such as "Yongbieocheonga Song" and "Goryeosa Record" and commanding a scenic landscape. "Hwallaejeong Pavilion" was built over an artificial pond inside "Seongyojang House" garden after "Yeolhwadang." Its entire walls consist of sliding doors with a lattice pattern. There is a tearoom for receiving guests, at a corridor connecting rooms and floors.