Sustainable Inspirations of The Week: 5 Impressive Wooden Structures

In recent years, wooden structures has re-emerged as one of the most innovative and sustainable materials in contemporary architecture. With advancements in engineering and a growing focus on eco-friendly design, these structures are reaching new heights. In this article, we explore five outstanding wooden buildings from around the world that push the boundaries of design, technology, and environmental responsibility.

GC Prostho Museum Research Center by Kengo Kuma & Associates

Located in Kasugai, Japan, this 421 m² museum was designed by Kengo Kuma & Associates. The building’s design is inspired by Cidori, a traditional Japanese wooden toy made by connecting sticks through special joints without using any nails or metal parts. Originating from Hida Takayama, a mountain town known for its skilled woodworkers, the toy’s system was adapted into a full-scale architectural structure using larger wooden elements (60mm x 60mm in cross-section and lengths of 2m or 4m), forming a 50 cm grid across the space.

Structural engineer Jun Sato tested the strength of this wooden system and proved that even a toy-inspired method could be used in a real building. The museum demonstrates how small wooden parts can come together like building blocks to form a larger structure. The idea behind the project was to return to a more human and hands-on way of building, moving away from machine-dominated construction methods.

The Grand Ring by Sou Fujimoto Architects

Designed by Sou Fujimoto Architects for Expo 2025 Osaka, The Grand Ring is a massive circular wooden structure that surrounds the entire expo site. With a total area of 61,035 square meters, it has been recognized by Guinness World Records as the largest wooden architectural structure in the world. The ring serves as the expo’s main walkway, guiding visitors while also offering covered areas for protection from the weather.

The design features a two-kilometer circular path with a 700-meter diameter, symbolizing unity among the 150 countries participating in the event. Built with a modular system, the structure combines both modern and traditional Japanese construction methods. One of the key techniques used is the Nuki joint, where wooden beams are slotted into vertical posts—commonly seen in historical Japanese temples. The Grand Ring reflects a balance between innovation and cultural heritage in architecture.

Mjøstårnet – The Tower of Lake Mjøsa by Voll Arkitekter

Completed in 2019 and covering 15,000 m², Mjøstårnet in Norway is the world’s tallest timber building. Designed by Voll Arkitekter, it represents a major step in sustainable architecture. What makes this project unique is that both the materials and expertise were sourced locally. From the viewing platform at the top, visitors can actually see the forests where the timber was harvested and the facilities where it was processed—emphasizing the connection between nature and construction.

Planning for the tower began in 2015 with close collaboration between the architects, the client, and the construction team. It’s not just a record-breaking structure but also a statement about changing how we build—proving that tall buildings can be made from renewable, eco-friendly materials like wood. Mjøstårnet is a powerful example of putting sustainability into real action.

The Smile by Alison Brooks Architects

Designed by Alison Brooks Architects in collaboration with AHEC, Arup, and the London Design Festival, The Smile is a striking example of innovation in timber architecture. Displayed at the Chelsea College of Art from 17 September to 12 October, the structure is made from cross-laminated American tulipwood. It was one of the festival’s Landmark Projects and was open for the public to walk through and experience from the inside.

This curved, tube-like structure is 3.5 meters high, 4.5 meters wide, and 34 meters long. It curves upward at both ends, resembling a giant wooden beam lifted into the air. The Smile is notable for being the first structure to use large-scale CLT panels made from hardwood, pushing the boundaries of both design and material innovation in timber construction.

Tamedia Office Building by Shigeru Ban Architects

Completed in 2013 in Zurich, the Tamedia Office Building was designed by Shigeru Ban Architects and covers an area of 10,120 m². Its most unique feature is the exposed timber structural system, which sets it apart both technically and visually. All structural elements are made from wood and are clearly visible inside the building, creating a warm and elegant working environment while showcasing the material’s potential.

The project stands out for its commitment to sustainability. Timber, being a renewable resource with low carbon emissions during construction, was chosen as the main material. Additionally, the building’s mechanical systems are designed to be energy-efficient. For instance, the intermediate space serves as both a thermal buffer and a public area, using extracted air from the office spaces to provide heating and cooling. This smart integration of passive and active systems enhances both environmental performance and user comfort.