Wedge House 住宅 by Kiyoshi Sugimoto is a highly esteemed winner of the very prestigious 2025 A' Design Award 銅賞 in 建築・建物・構造物デザイン Competition Category.
銅建築· 2025
Wedge House 住宅
Client: Masato Ikuta
A' Design Award 銅賞 Winner in 建築 Category
Verified Award Winner
Verify Award Status for #162815The Design
About Wedge House 住宅
ウェッジハウスは、日本の池田市にある急勾配の斜面をもつ狭小地に建つ、地上2階地下1階の住宅である。くさび形の断面により、最も広い床を最上部に、最も小さい床を地下に配置することで、既存の古い擁壁に新たな荷重を加えない構成としている。上部2層は木造、地下部分は鉄筋コンクリート造である。東西の壁面はシルバー塗装の鋼板で仕上げられ、片持ちの床を支えるとともに、南側への眺望を切り取る額縁となっている。2階のリビングは、広い眺望が開けるテラスへとつながっている。
The Recognition
About the A' Design Award 銅賞
Wedge House 住宅は、創造性、独創性、鋭い洞察力で際立つ傑出したデザインに授与される、高い権威をもつ評価である A' Design Award 銅賞の受賞作品です。銅賞の受賞作品は、十分に巧みで印象的なほど創造的な工芸品であり、デザイナーの豊富な経験、想像力、機知を裏づけています。Wedge House 住宅は、高く評価され、称賛され、愛される品であり、顕著にプロフェッショナルで革新的であることが期待されます。この A' Design Award 銅賞を受賞したデザインは、芸術・科学・デザイン・技術のベストプラクティスを取り入れており、細部への配慮に優れています。Wedge House 住宅は、ニーズを見事に満たし、欲求に触れ、感情を魅了し、好奇心を引きつけます。
Behind the Design
Press Kit
Credits, team members and technical details provided by the designer.
- Unique Properties
- The site has a nice view, but it is narrow and has a steep slope, and due to area regulations, the building coverage ratio is a strict 40%.
In order to meet the required area to comply with strict regulations, we adopted a three-story mixed structure with two floors above ground made of wood and one floor below ground made of reinforced concrete.
The building has a wedge-shaped shape, with the second floor, which has the best view, as the living space and the largest area, and the area decreases as you go to the lower floors to avoid applying force to the retaining wall. - Dimensions & Packaging
- Total floor area 111.16㎡ Width 5560mm x Depth 11000mm x Height 10190mm
- Tags
- Slopingland structure protruding structure wedge Basement mountainside
- Production Technology
- The east and west walls are finished with silver galvalume steel plates, which support the cantilevered floor that protrudes from the basement, and at the same time serve to frame the view to the south.
The basement is a bedroom with a sense of security that feels like it's nestled on a slope. The first floor has a water area and a study with a view of the greenery of the park behind the deep eaves. From the sky terrace of the LDK on the 2nd floor, you can enjoy a panoramic view of the Osaka plains. This is a house where you can enjoy the three different slopes of Mt. Satsuki. - Design Challenge
- Stable structural design with an underground shape that does not apply force to old retaining walls on a narrow, steeply sloped site, and a protruding structure for the wooden upper building.
- Research
- Research on stable structures with protruding shapes in wooden buildings
- Inspiration
- The site is located at the foot of Mt.Satsuki in Ikeda City, Osaka Prefecture, Japan. The site was narrow, and more than half of the site was on a steep slope.
Additionally, the site is located on an old, tall retaining wall, so the building had to be constructed in a way that would not put stress on the retaining wall.
Therefore, the building's cross-sectional shape is wedge-shaped, with the basement being the smallest and increasing as the floors rise. - Project Duration
- Design for the project began in September 2022 at a site in Ikeda City, Osaka Prefecture, and was completed in June 2024.
- Operation Flow
- A basement with a shape that does not apply force to the old retaining wall, and a pop-out floor structure for the upper wooden building to maintain the required area.
- Patents
- Copyright 2024 Kiyoshi Sugimoto.
- Team Members
- KIYOSHI SUGIMOTO
- Image Credits
- All photos and videos Hirofumi Imanishi
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