Inquiry of Harm Traditional Building of Toba Batak House Based on Cultural Value of Toba Samosir District

One of the volcanic islands in North Sumatra is Samosir Island, which is in the middle of Lake Toba, which was newly opened in 2003. The island is an attractive island for domestic and foreign tourists to visit. Batak people who live in North Sumatra. Unfortunately, currently there are not too many Bolon Houses and some types of Bolon Houses are even difficult to find and also lack maximum maintenance so that many Bolon Houses can be categorized as damaged. One of the houses that need to be considered is in Simanindo Sangkal District, Jalan Jumban Sitio. In this research, the declining condition of the building will affect the function of the space in the building, because it affects the feeling of comfort, security, and preservation of the Bolon House cultural heritage for the wearer. The condition of this building will not continue to be stable as when it was newly built, one day it will decrease and possibly get worse so that the sustainability of the Bolon House will decrease, so that action is needed to restore it to its original condition or to prevent even worse conditions.