鴻根雅筑因祝融，只有牌樓與兩旁的紅磚牆保留下來。牌樓與紅磚牆已有七十年歷史，極具保存的價值，加上屋主對祖父起家厝的親情感念，建築師決定保留舊有牆面與其語彙，部分牆面露出紅磚，讓人們在建築內也能感受到舊建築的歷史氛圍，為鴻根雅筑這棟老屋編寫出底韻動人的新曲。

設計方案是由三道曲線構成。二道曲線形成斜屋頂的設計，使屋頂呈現漸變的模式，因此每一個屋頂剖面都是不同的曲面。最後一道曲線為室內之承重牆，承重牆為複曲面，不論是垂直或是水平都呈現為曲面的形式，此牆面將每層樓之空間劃分為一大一小，大的空間為主要使用的空間，小的空間則成為樓梯間，樓梯間的屋頂設置天窗，可使光線照入，讓室內明亮。

室內主體興建新的建築物，除了重視空間機能的佈設之外，並運用建築師擅長的重視材料接合與構造系統的整合設計，使用內外側曲線造型的清水模板，表現出建築物充滿活力的動能，完成了符合當代需求的嶄新建築風貌。

The Hong-Gen mansion was engulfed by fire with only the front façade and side walls of red bricks remaining. The main structure was built by the family’s grandparents with a history of 70 years. Given its historical value and the emotional attachment between present owner and the house, the architect decides to preserve the existing façade and walls.

The design is composed of three curves. Two curves define the contours of the sloping roof. The roof’s angle changes along the curve. The third curve is a load-bearing wall with curvatures in both the horizontal and vertical dimensions. It divides each floor into two zones: the larger zone is the main space with the stair occupying the smaller zone. The stair is topped with a sunroof introducing natural light into the interior.

The design emphasizes the arrangement of the functional spaces with the architect’s special attention given to the integration of structural system and materials. The architectural concrete of the curved wall is a dynamic element and transforms the tradition into the new.