Idee Architects has designed Khai Son Duo Penthouse by merging two adjacent penthouses into one continuous living environment for a young family. The project creates a vertical spatial journey that links double-height voids, balconies, and diverse living areas into a cohesive home.
© Wuyhoang Studio
A central circulation spine defines the layout, dividing the penthouse into two parts: primary functional nodes on one side, and complementary areas on the other with expansive views of the city. At both ends, a rectilinear stair and a sculptural spiral stair connect the two floors, allowing fluid movement across the residence.
© Wuyhoang Studio
Two large double-height voids serve different purposes: one becomes a generous living room, the other an indoor garden extending from the dining and kitchen area into private bedrooms. Vertical continuity is emphasized through linear forms in the living room and tall trees in the garden, creating an open, playful, and light-filled atmosphere for children and family members alike.
© Wuyhoang Studio
The design adopts a modern architectural language with bold, clean lines. Rough travertine stone surfaces contrast against metallic elements, generating a balance of raw texture and refined detail. Khai Sơn Penthouse embodies a sense of openness, creativity, and warmth—an elevated home that celebrates both verticality and family life.
Project Info:
Architects: Idee architects
Country: Vietnam, Hanoi
Area: 600 m²
Year: 2025
Photography: Wuyhoang Studio
Lead Architects: Tran Ngoc Linh, Do Duy Hung
Design Team: Do Duy Hung
Sophie Tremblay is a Montreal-based architectural editor and designer with a focus on sustainable urban development. A McGill University architecture graduate, she began her career in adaptive reuse, blending modern design with historical structures. As a Project Editor at Arch2O, she curates stories that connect traditional practice with forward-thinking design. Her writing highlights architecture's role in community engagement and social impact. Sophie has contributed to Canadian Architect and continues to collaborate with local studios on community-driven projects throughout Quebec, maintaining a hands-on approach that informs both her design sensibility and editorial perspective.