Sustainable Office Design in the UK: Plant Basingstoke's Award-Winning Restoration

The Plant Basingstoke Offices and Garden Restoration stands as a pioneering example of sustainable office design in the UK. Originally built in 1973 as Mountbatten House, this modernist icon was transformed into a cutting-edge workplace by a collaboration between Feilden Clegg Bradley Studio, Studio Knight Stokoe, Twelve Architects, and Grant Associates. The restoration project successfully merges the legacy of Peter Foggo’s original vision with contemporary innovations in sustainability, well-being, and architectural excellence. This revitalization not only enhances the building’s environmental performance but also redefines the relationship between workspace and nature.

A Legacy of Modernist Excellence

Designed in the early 1970s by Peter Foggo of Arup Associates, the original structure, known as Gateway House, introduced a unique concept of terraced office spaces integrated with tiered roof gardens. These spaces provided a seamless blend of architecture and landscape, setting a precedent for environmentally conscious office buildings. The architectural significance of the structure led to its heritage listing by English Heritage in 2015, recognizing both the building and its gardens for their design excellence.

Reimagining a Sustainable Future

The restoration of Plant Basingstoke goes beyond preservation. The project prioritizes sustainability, energy efficiency, and biophilic design, aligning with the highest standards of modern office environments. The refurbishment aims for a BREEAM ‘Outstanding’ and WELL Platinum certification, setting a new benchmark for commercial office sustainability in the UK. The core design strategies focus on:

• Retaining and enhancing the original modernist structure while upgrading it to meet contemporary energy performance standards.
• Refurbishing the curtain wall system to improve thermal efficiency and reduce energy consumption.
• Integrating cutting-edge MEP systems to enhance operational efficiency and future-proof the building.
• Maximizing daylight penetration through redesigned double-height spaces and vertical connections.
• Expanding access to rooftop gardens to reinforce the integration of nature and workspaces.

Architectural and Structural Innovations

A key feature of the project is the redesigned entrance and reception area, creating a welcoming and visually striking entry point. A new helical staircase provides an elegant circulation route while double-height spaces increase connectivity between floors. These changes enhance natural light flow, creating a workspace that is both aesthetically and functionally superior.

The removal of suspended ceilings exposed the original coffered slab structure and cruciform columns, restoring the architectural character of the building. The interiors now embody a raw, modernist aesthetic while ensuring an optimal working environment.

The Revitalized Hanging Gardens

One of the most celebrated aspects of the project is the revival of the ‘Hanging Gardens of Basingstoke’. Originally designed by James Russell, these multi-level gardens have been meticulously restored using an adaptive climate-resilient approach. Extensive research into historic planting lists allowed the landscape architects to replace species unsuitable for rooftop conditions with those that foster biodiversity and environmental resilience.

Over 22,500 new plants and 86 trees were introduced, maintaining the gardens’ lush and informal aesthetic. The project team preserved original paving elements, ensuring that the revitalized gardens remain true to Russell’s original vision. A deteriorating pond was reimagined as a sculptural water feature, enhancing the sensory experience of the gardens.

A Workplace of the Future

With a total area of 19,515 square meters, the newly transformed Plant Basingstoke offers a dynamic workspace that fosters productivity, well-being, and sustainability. New amenities, including a cafe, gym, cycling facilities, and event spaces, make the office environment more engaging and adaptable to modern working trends. The combination of architectural heritage, innovative retrofitting, and green spaces creates a workspace that is not only environmentally responsible but also enhances the quality of life for its occupants.

The Plant Basingstoke Offices and Garden Restoration sets a new standard for sustainable office design in the UK, demonstrating that historical buildings can be preserved and upgraded for the future. The fusion of modernist architecture with regenerative landscape design showcases the potential of adaptive reuse in commercial real estate. By prioritizing sustainability, well-being, and biophilic principles, the project highlights the evolving needs of workspaces in a rapidly changing world.

All Photographs are works of Andy Stagg