There is a need for the developments on the hillside to be regulated by Urban and Regional Planners, Architects and Engineers to assure safe, conducive and sustainable developments on the hillside. This is because hillsides are challenging to develop on due to sloping terrains which are a catalyst to landslides, erosion and floods. Although the residents of Peleng managed to find a way to settle, the success came with challenging living conditions in the long run. The paper then investigated the methods used by the residents in trying to overcome the challenges of developing without the aid of Building professionals and analysis the impacts incurred. The study then determined if there is a need for building professionals to regulate developments on the hillside.