The new UK Net Zero Carbon Buildings Standard Version 1 is launching in the first quarter of 2026, presenting a unified definition of what a Net Zero Carbon building is in the UK. While the Standard is pioneering and the targets are challenging, there are substantial lessons learned from the industry on existing projects with ambitious sustainability targets which can be used to help comply with the UK Net Zero Carbon Buildings Standard and become Net Zero Carbon.
What are those lessons learned and how can they help in achieving Net Zero Carbon in accordance with the UK Net Zero Carbon Buildings Standard?
Net Zero Carbon key metrics
For context, the image below demonstrates the key metrics a Net Zero Carbon building needs to comply with. The specific embodied carbon and operational energy targets vary across sectors and depend on the year the construction begins. The later the construction start year, the more ambitious the targets are.
1) Sustainability Consultants need to be involved from the inception of the project, and sustainability needs to be factored in within fundamental design decisions by the multi-disciplinary team early on.
- A strong sustainability brief from inception is key
- Most carbon savings are done through early design decisions
2) Sustainability is a team effort and should not be the sole responsibility of the Sustainability Consultant
The most successful sustainability projects are those where everyone chips in, asks the right questions throughout, and takes ownership of the sustainability impact of their project decisions or design measures. This extends to the Client, Project Managers, Cost Consultants, Architects, Structural Engineers, MEP Engineers, Landscape architects etc.
3) Tailor your price to the specifics and ambitions of the project instead of following a Business-As-Usual strategy
- Assumptions for cost plan and budgets at inception stage need to be transparent and communicated clearly. Sustainability experts, design teams and contractors should advise on hurdles and red flags. (Even if, for example, a Contractor is not on board until much later on).
- Use Carbon-to-Cost metrics and shopping lists from early-on in the project. Engage potential contractors early on to advise on preferred existing supply chains and gauge the potential sustainability opportunities and obstacles associated with these.
4) Programme and procurement routes need to be tailored to the sustainability ambitions and to the complexity of the building
- Programme and procurement routes need to be brainstormed with Sustainability Consultants and design teams to optimise pathways which will lead to the most sustainable project possible and to avoid downfalls
- Ensure that the timing of the enabling works contractors procurement allows for the required sustainability reuse measures to be included within the Enabling Works Contract. If the Enabling Works Contract is signed at an early RIBA stage where the design team has not had the chance to determine reuse measures in a robust way, this can create a risk with regards to the Circular Economy strategy.
- An optimised procurement and programme route will build-in an allowance to prepare the strongest ERs possible.
- Key surveys and data for retrofits need to be allowed for in the programme
5) Manage various project brief targets which may be conflicting at first sight (UK NZC BS, WELL, Cost, embodied carbon, operational energy, etc.)
- Use a brain decision mapping tool to help the team make decisions:
- Use Carbon-to-Cost metrics tools and shopping lists from the beginning of the projects:
- Engage potential contractors early on to advise on preferred existing supply chains and gauge the potential sustainability opportunities and obstacles associated with them.
6) Reuse to save carbon: The importance of maximising reuse and how demolition contractors can help with maximising benefits and reducing carbon.
Move away from the traditional “quick and dirty” approach to demolition.
- Bring the enabling works contractor and cost consultants on board to follow the circular economy proposals.
- Enable works contractors traditionally want to demolish the building as quickly and cheaply as possible. Take them on the journey, identifying the easy wins together.
- For the more challenging items, get the contractor to do a sample test to find out how the items (e.g. bricks and internal parquet) react to strip out methods.
- Maximise reuse opportunities through weekly/ fortnightly site visits during the strip out.
- Think about storage resources and options early on. Design a workflow so that reuse ideas and opportunities don’t get wasted.
7) Mitigate the risk of wasting sustainability opportunities as the project goes from design stage to construction stage.
- Incorporate sustainable design requirements for tendering Contractors in all the design ERs (Sustainability, Architectural, Façade, Structure, MEP, etc.)
- Adhere to a Soft Landings framework from the beginning of the project.
Final thoughts
Don’t be intimidated by seemingly experienced individuals who push back against new sustainability measures. Take them on the journey with you from the beginning.