Bronse Arkitektur · 2025

Wedge House Bolig

by Kiyoshi Sugimoto

A' Design Award i Bronse 2025 in Arkitektur
CLIENT: Masato Ikuta
Estimated Number of Design Views: 12,587
Verification code AF0303626D · Verify this award

Visit Site View at A' Design Award Press Release

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About Wedge House Bolig

Wedge House er en bolig i tre etasjer bygget på en smal tomt med bratt helling i Ikeda by, Japan. Det kileformede tverrsnittet plasserer den største etasjen øverst og den minste etasjen under bakkenivå, slik at ingen ekstra kraft påføres en gammel støttemur. De to øvre etasjene er bygget i tre, mens kjelleren er utført i armert betong. Øst- og vestveggene er kledd med sølvbelagte stålplater som støtter den utkragede etasjen og rammer inn utsikten mot sør. Oppholdsarealet i andre etasje åpner seg mot en terrasse med vid utsikt.

About the A' Design Award i Bronse

Wedge House Bolig er vinner av A' Design Award i Bronse, en høyt prestisjefylt anerkjennelse som tildeles enestående design som utmerker seg ved kreativitet, oppfinnsomhet og skarpsindighet. Bronsevinnere er rikt dyktige og påfallende kreative gjenstander som bekrefter designernes store erfaring, fantasi og ressurssterkhet. Wedge House Bolig forventes å være en høyt ansett, beundret og verdsatt gjenstand som er bemerkelsesverdig profesjonell og nyskapende. Dette designet, som har vunnet A' Design Award i Bronse, rommer beste praksis innen kunst, vitenskap, design og teknologi og utmerker seg ved sin omtanke for detaljer. Wedge House Bolig tilfredsstiller behov på en strålende måte, berører ønsker, sjarmerer følelser og vekker nysgjerrighet.

Press Kit

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.
Image Credits: All photos and videos Hirofumi Imanishi