This project involves a single-story renovation of a residential building, with an interior area of about 90 square meters. Because of the gradual aging of the building, its location on a hillside with heavy humidity and being situated in an unobstructed windward-facing side, the planning and design prioritized overhauling the exterior before moving on to the interior space. First, basic works such as waterproofing of exterior walls, use of premium airtight windows and replacement of pipelines were completed.