Engineering a Net Zero NHS

The NHS Net Zero Building Standard is one of the most technically rigorous frameworks applied to UK public estates. It is beyond just a sustainability ambition, as it requires precise modelling and evidence, and continuous verification across each RIBA stage – with the aim of transforming how healthcare buildings are conceived and delivered.  

At the core of the Standard are three interlinked compliance documents: the Design Management Tool (DMT), the Operational Energy & Carbon Compliance Tool (OE&C), and the Whole Life Carbon (WLC) Tool. These collectively define, test, and validate performance standards from early design stages through to completion. The DMT records key design decisions; the OE&C Tool sets whole building energy limits through space allocation and Dynamic Simulation Modelling; and the WLC Tool assesses embodied and operational carbon across the full lifecycle using RICS‑ aligned methodology‑.  

Binding these elements together is the Net Zero Carbon Coordinator (NZC) role – initially unique to the NHS but now increasingly important in the wider construction sector. Kendall Kingscott has experience in this, acting as the technical link between trust and design team - the NZC sets early performance targets, manages compliance tools, coordinates carbon-focused reviews, and ensures derogations are justified. This requires deep fluency in energy modelling, carbon accounting, building physics, and the complexities of healthcare operations.  

Our role as architect and NZC on the RUH Bath ward schemes shows how this plays out in practice. The project must achieve stringent fabric performance - including wall U-‑values of 0.12 W/m²K and airtightness at 1 m³/hr/m² @50Pa - well beyond Part L and moving closer to Passivhaus performance levels. Upfront embodied carbon limits, ensure consideration is given to MMC and the use of modular / off-site construction at the earliest possible stage. 

This technical evolution also sits within a broader industry shift. The UK Net Zero Carbon Buildings Standard Version 1 was released last month after a year long‑ pilot phase - this now provides a unified national framework. The NHS led the way with the implementation of its 2022 Standard and the NZC role closely align with this new guidance, placing NHS clients -and those working with them - at the forefront of credible net-‑zero delivery. This alignment means many other clients may soon adopt similar approaches. 

Kendall Kingscott’s 1 Team approach ensures the modelling, documentation, and multidisciplinary coordination needed to deliver NHS buildings that perform with carbon accountability built in from day one. Achieving Net Zero in healthcare and in other sectors will rely on technical execution.