B-5 Villa, located in Istanbul's central Beykoz area, is a three-story restoration and interior architectural residential project. Seismic considerations led to rigorous structural reinforcement. The design concept, guided by user needs, energy efficiency, and site features, provides cohesive spaces. The ground level encompasses living areas, the kitchen, and gardens, with an underground floor for technical facilities. Extensive windows maximize natural light. Transparency and functionality drive the design transformation, aiming to rejuvenate the old structure.