Denmark’s Tallest Timber Building Tests Circular Construction Methods

In Aarhus, Denmark, a roughly 260-foot-tall mass timber building is testing whether high-rise construction can be reimagined as a low-emissions, circular system, Metropolis reported (3-20-26).

Recently completed, the project—known as TRÆ—is now recognized as Denmark’s tallest timber structure. Built across a roughly 3.62-acre redevelopment site in a former industrial harbor, it serves as a prototype for reducing reliance on carbon-intensive materials in dense urban construction.

The development consists of three interconnected volumes, including a 256-foot tower, all constructed with CLT slabs and glulam columns anchored by concrete cores. The hybrid system reflects both structural requirements and regulatory constraints.

Design elements emphasize permeability and reuse. A pedestrian bridge links the site to a planned elevated walkway, while ground-floor amenities and exterior paths encourage public access. The project also incorporates repurposed wind turbine blades as exterior sun-shading devices—an approach that required extensive fire testing and façade modifications to meet regulatory requirements.