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BIM Architecture: The Diagonal Pyramid Concrete Building at Areuke Spa by Chiasmus Partners

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

Hongdae and Gangnam are Seoul’s most commercially vibrant districts. These extensive areas encompass entire administrative zones and feature a diverse array of buildings, including single-family homes, multi-family residences, shopping centers, office towers, mixed-use residential complexes, and exhibition halls. These structures are nestled among streets developed across different urban phases, ranging from broad main roads to narrow alleys.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

The commercial life of Hongdae District thrives on its dynamic art scene, driven by young artists and independent musicians. Cultural expressions abound here, from street performances to vibrant murals, seamlessly blending with the residential and commercial fabric.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

The openness, flexibility, and creativity intrinsic to modern art are increasingly reflected in both residential and commercial spaces. From basements to rooftops, many areas have been repurposed as venues for performances and exhibitions, with renovations and innovative designs shaping Hongdae’s distinctive architectural character.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

Areuke Spa is situated in an alley within the older residential area of central Hongdae, surrounded by several low-rise buildings that have been converted into hair salons, restaurants, and cafes. Due to strict legal regulations regarding daylight access in high-density zones, the building adopts a pyramid-like inclined form, maximizing the usable space within the height limits.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

As the flagship spa center of a cosmetics company, the building’s design prioritizes commercial appeal: its unique, open shape is designed to capture the attention of passersby from the surrounding streets and draw them inside.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

The lower level serves as a space for product displays and skin consultations, while the upper floor hosts personalized spa treatments in a more intimate setting. The relatively high basement is designed for events and exhibitions, and the first-floor lobby doubles as a coffee shop and spa reception area. Vertically, the building transitions from public areas below to private spaces above.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

The exterior load-bearing walls are constructed from plain concrete, serving as both structural support and building envelope. This material choice lends the building a raw, pure aesthetic that subtly reflects the purity of human skin. On the street-facing corners, the concrete’s high ductility allows for gentle curves, with recessed lighting grooves adding a modern color display effect.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

The building is composed of a single concrete block with thick exterior walls designed to conceal interior changes, effectively isolating the commercial activities inside from the outside environment. Nevertheless, the exterior details emphasize and express the building’s commercial identity.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

In commercial districts, when new tenants move in, building signage often changes, and original architectural styles and unique urban interactions may be lost. This has led to the emergence of generic commercial buildings that offer only basic structural frameworks. When such uniform buildings dominate the cityscape, they risk losing distinctiveness and recognizability amid commercial pressures.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

Looking ahead, given Seoul’s continually evolving functional zoning, Areuke Spa may be replaced by other businesses such as hair salons, sushi restaurants, or cafes within a decade. Traditional architectural spaces struggle to keep pace with such rapid commercial transformations, so modern buildings require flexible spatial layouts and circulation patterns to accommodate future changes.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

However, spatial flexibility does not mean compromising the building’s physical form. There remains ample opportunity to creatively engage with the surrounding environment. Ultimately, buildings shaped by commercial and brand demands must embrace adaptability to maintain relevance in a rapidly developing city.

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners
BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

Project Drawings

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ First Floor Plan

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ Second Floor Plan

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ Third Floor Plan

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ Fourth Floor Plan

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ Fifth Floor Plan

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ Roof Plan

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ Underground Floor Plan

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ Elevation Drawing

BIM Architecture | Diagonal Pyramid Concrete Building, Areuke Spa/Chiasmus Partners

△ Elevation Drawing

Project Information

Architectural Design: Chiasmus Partners

Area: 456 m²

Project Year: 2021

Photographer: Namsun Lee

Manufacturer: A&L Windows, Concrete

Lead Architect: Hyun Ho Lee

Designers: Narae Yang, Hansoo Noh, Jeogwon Kim, Sungjoo Han

Interior Designer: SangHee Yoo

Building Base Area: 100.78 square meters

Building Scope: Basement 1 / 4 floors above ground

Parking Spaces: 3

Structural Engineer: ACE Consulting Engineering / JooHyun Park, Reinforced Concrete

MEP: Seungjin ENC.

Location: Gangseo-gu, South Korea

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