Visual and spatial changes of the Batak Bolon House as the adaptation of its people's lives in Gurgur Aek Raja village of Toba Samosir Regency

Traditional people always adapt to settle. Along with the time, the traditional houses have changed adaptively to human needs. One example could be found in the Bolon Toba house around the Toba Lake area. Many of the Bolon houses adding some new structures that make the visual form change. This research studied phenomena of the Bolon House changes in Gurgur Aek Raja village to find out visual and spatial variations as the adaptation of its people's lives. Descriptively, Bolon House in Gurgur Aek Raja village is described and compared with the original shape of Bolon House in the TB Silalahi Center. The changes were studied using the exoskeleton adaptation concept in the building. Based on the result of the analysis, changes in the Bolon Houses of Gurgur Aek Raja village are dominantly affected by the economic aspect, the way in accommodating new needs, and lifestyle that keep up with the times.