The architect’s other key move was create spatial diversity within the large, homogeneous volume, while also retaining and integrating the existing structure. “We are always looking for the coexistence of old and new to bring out the best of both,” comments  Tony. This approach is reflected in the decision not to highlight the distinction between retained and new elements. Instead, the design seeks to create a unified architectural language in which interventions are absorbed into the existing fabric.

The plan is organised around a sequence of interconnected spaces designed to support both individual and collaborative work, as well as encourage movement, interaction and visual connection across different departments. At the eastern entrance, a double-height foyer acts as the primary point of arrival. This space functions as a reception, exhibition area and informal meeting zone, providing immediate visual connections across the building.

The courtyards play a key role organisational role, with workspaces and shared areas, such as the foyer and cafeteria arranged along new internal facades. While they differ in scale and character, both courtyards contribute to a network of interior landscapes that structure movement and interaction. They also contribute to the building’s environmental strategy by promoting natural ventilation, passive cooling, and of course daylighting. The windows lining the courtyards are protected from solar gain by deep roof overhangs.

Complementing the courtyards is an extensive rooflight strategy. The substantial fifth elevation is treated as a ‘landscape of VELUX products’, with 387 electrically-operated roof windows and 26 modular skylights ensuring daylight across the full depth of the building. Triple-glazing is used throughout in combination with internal blinds for the skylights. The windows are linked to the buildings automated natural ventilation system, enabling them to respond to changing daily climactic conditions.

One of the project’s most defining features is its reuse of existing construction materials. More than 55 per cent of the materials that would have been required for a new building were saved through retention and repurposing. Key elements that were retained include the primary timber structure, concrete floor slab, roof structure, and internal concrete walls. Where materials were removed, they were reused within the project or elsewhere on site. Timber elements, for example, were repurposed for insulation, façades and furniture, while concrete components were reused as paving and landscaping features.

New structural elements are designed to complement the existing timber frame. Additional loads are carried by new timber structures, ensuring that the original building is not overstressed. The new interventions are conceived as a continuous system rather than discrete additions, and according to Tate, represent “one big wooden structure” integrated throughout the building. This strategy is also designed to support flexibility and long-term adaptability, with spaces able to be reconfigured over time without compromising the overall coherence of the building.

Natural ventilation forms a key component of the environmental strategy, supported by an automated system of opening windows and rooflights. Air enters through façade openings and exits through the roof via stack effect, reducing the need for mechanical cooling. Mechanical systems are used selectively in areas where natural ventilation is insufficient, such as the prototype manufacturing and testing areas.

Thermal comfort is based on an adaptive comfort model, which allows for seasonal variation and user interaction. The building achieves a CO2 footprint of 4.6 kg CO2e/m²/year, significantly below current and proposed Danish regulatory limits. The combination of courtyards and rooflights ensures that all workspaces have access to natural light, reducing the reliance on artificial lighting and supporting occupant wellbeing.

Carefully considered landscape design extends the architectural concept beyond the building envelope. Courtyards are planted with species that reflect the local ecology, while external areas have been reconfigured to prioritise nature over infrastructure. Concrete elements removed during construction are reused as pathways and outdoor features, creating continuity between building and site. The planting is intended to mature over time,  and contribute to shading and microclimate regulation, further enhancing environmental performance.

Conceived as a physical manifestation of VELUX’s research and sustainability culture, VELUX LKR Innovation House not only demonstrates the potential of deep retrofit but also highlights the importance of long-term thinking. As Tony wisely notes, “Buildings are part of an ongoing process, and future adaptation is inevitable.”