In a mansion house, captain’s house, in Galaxidi, a two-storey building with a four-pitched tiled roof, a study for its maintenance and restoration was prepared. The settlement and the building are historically preserved. Therefore, the intention of the architectural proposal for the repair of the building is on the one hand the highlighting of the rules of art that produced the specific morphology and on the other hand its functional restoration in a modern house. The new coatings from natural materials and powder paints, the wooden windows, the interior representations on ceilings and murals were preserved and restored.