Georgia Laganakou, Head of Sustainability at Hopkins Architects reflects on our latest conference exploring how the retrofit-first approach can create flexible and sustainable workplaces.
Commercial retrofit has its own challenges including structural and heritage. Its impact on carbon emissions is clear, accounting for 23% of overall build environment, along with the required volume of 74% of offices needing to be retrofitted in London to meet the Mayor’s 2030 commitments. The conference was an excellent opportunity to hear from several experts, presenting the latest trends of the office retrofit market, user needs, skill gaps in the industry along with a number of successful case studies.
Trends and Guidance
Kirsty Draper, Head of Sustainability for UK Agency JLL, pointed out the changing workplace market dynamics, their impact on asset value and the importance of strengthening owner-occupier relationships to drive change. Location, Sustainability, Wellbeing and Specification are the key messages. Tina Hakkaki, Senior Associate at Gensler, presented their recent workplace survey results signifying the changed work patterns of hybrid working and the considerations we need to apply in our design to accommodate for wellbeing and desirability while increasing productivity. Chris Oldham, Senior Policy and Programme Manager at the City of London Corporation, presented the work of the Sustainable Skyline Taskforce which underlines the level of skills required in the workforce to decarbonise Central London's commercial built environment and the skill gaps still facing the industry. Mathew Blane from Hassell and Helena Morris from Stanhope joined the panel discussion to provide a further insight into the importance of a working / living city, the flexibility of rethinking existing space use and the level of assessment needed to reuse and retrofit existing building structures.
The retrofit-first approach
In the second part of the conference three great case studies were presented.
- 250 Bishopsgate: John Avery, Director at LOM, presented how a multi-functional building was able to be created by stripping back the space to its original structural shell and focusing on providing occupant wellbeing via a variety of spaces, amenities, and biophilic design principles.
- All Saints: Edward Wood, Associate Director at EPR, showed that energy reductions were feasible by improving the form factor of the building via the creation of additional space connecting to the existing building. Greater open spaces were created, and natural cross ventilation is part of the strategy along with fabric, services upgrades, and selection of low carbon materials such as secondary timber spans in the structure.
- Tea Building: Tim Hyman, Group Architect at Derwent described how the Tea Building has transformed thoughout the years, what additional retrofit solutions have been applied since 2004, such as glazing upgrades and heat transfer among units within the building via a thermal loop, as well as future transformation plans. Tim underlined the importance of designing spaces to be flexible, simple, and desirable. The key messages of the conference can be summarised by Tim’s reference to Alex Gordon’s 1972 essay title “Long life, loose fit, low energy”.
Retrofitting the existing stock can be the most impactful way to accelerate decarbonisation and while there are challenges and complexities in the process, the speakers also presented the wider environmental, social, and economic benefits. Commercial space has moved to an almost unprecedented change where real sustainability credentials, occupant wellbeing, staff retention and creating spaces of dynamic collaboration are the significant drivers.