Frequently Asked Questions
Use the below headings to navigate to a specific section. These are frequently asked questions, answered by the Standard's Technical Steering Group.
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Definitions
1
What do you mean by a "Net Zero Carbon Building"?
A building whose operational and embodied carbon performance is within limits which allow the UK built environment to stay within its own allocation of remaining carbon budget, in order to limit warming to 1.5°C.
We sought input via consultations on whether the Standard should require offsets to be purchased to balance the asset-level emissions.
2
What do you mean when you say that the Standard is "science based"?
The Standard sets science-based limits and targets. According to the Science Based Targets Initiative, these are considered ‘science-based’ if they are in line with what the latest climate science deems necessary to meet the goals of the Paris Agreement. We have apportioned the UK’s remaining carbon budget to determine a budget for the built environment, and this has been used to set limits and targets.
3
Can the Standard ever be 1.5°C-aligned if the world is set to pass that point?
Even if other sectors exceed their 1.5°C carbon budget, it is important for the built environment to aim to stay within its own. The 1.5°C pathway sets the budget - the Standard sets out what individual buildings must achieve to stay within it. This will need to be continually reviewed based on discussion and agreement between ours and other sectors.
4
Is this a certification scheme / assessment scheme / tool?
It is a ‘Standard’ and not a scheme or tool. It will provide a consistent approach to assessing whether a building can be defined as ‘Net Zero Carbon’, which can then be used as the basis for verification by other independent bodies, and could be incorporated into tools.
Technical
5
What does the Standard set limits and targets for?
A full list of characteristics and metrics are shown in the Technical Update and Consultation document. This includes setting limits on embodied carbon and operational energy, and minimum targets for aspects such as on-site renewables, demand flexibility, etc.
6
What do you mean by "limits and targets"?
"Limit" is used to describe maximum requirements that must not be exceeded, such as an embodied carbon limit. "Target" is used where describing a minimum requirement, such as an on-site renewable power generation target.
7
Why is Whole Life Carbon not used as a single metric?
We need to stay within a renewable energy budget for the UK, if the country is to reach Net Zero Carbon. This means that energy use is as important as carbon use, and so limits for embodied carbon and operational energy are set based on their allocated share of the whole-life carbon budget, and the renewable energy budget, for the built environment.
8
Does the Standard advocate specific design solutions or accreditations, such as Passivhaus?
No. The Standard is solutions agnostic. The Standard sets out out the performance criteria, but how the performance criteria are met is not mandated.
Application
9
What types of buildings does the Standard apply to?
The Standard applies to new buildings, existing buildings and retrofits. The initial focus is on the most common building typologies, especially those for which industry stakeholders already have robust performance data available to develop the targets and limits.
10
Who is the Standard written for?
It is for anyone who wants to either fund, procure, design, or specify a Net Zero Carbon building, and anyone wanting to demonstrate that their building is Net Zero Carbon in accordance with an industry-agreed Standard. As a robust industry-backed initiative, the Standard may also be useful to policymakers looking to create policy to support a Net Zero Carbon transition.
11
Are there different limits and targets for heritage buildings?
We had assembled a working group looking specifically at the challenge of applying a Net Zero Carbon Standard to historic buildings or those with heritage aspects. After extensive consultation and analysis heritage buildings do not currently form part of the Standard.
Creation
12
How have you decided how much carbon budget the buildings sector gets?
An extensive literature review has shown that there is no agreed method for how to define a sectoral carbon or energy budget for the built environment, either in the UK or elsewhere. Analytical work was done and is ongoing to derive robust carbon and energy budgets from the Climate Change Committee’s Sixth Carbon Budget, the carbon budget will be ‘upscaled’ to reflect consumption-based emissions, rather than territorial (i.e., including embodied emissions that originate outside of the UK)
13
Who is making the decisions behind the Standard?
The Standard development has been led collaboratively by nine of the leading built environment organisations from which a Technical Steering Group and Governance Board was formed. The work has been supported by over 300 expert volunteers working in a series of Task Groups and Sector Groups
14
When was the Standard introduced?
For the Standard to be adopted in a way that ensures its traction and integrity in the long-term, it had to be both technically robust and have a supporting strategy for implementation and governance. As such, the Pilot version of the Standard has now been published for use. Subject to receiving further funding to maintain momentum behind the current programme, we are aiming to produce subsequent versions of the Standard to address any changes in Carbon budgets and continuing industry feedback.
15 |
Why did it take so long to write?
The Standard is the most thorough attempt yet to set science-based limits and targets for Net Zero Carbon Buildings in the UK. It had to be sufficiently robust to ensure that it will continue to be useful throughout the country's transition to Net Zero. Achieving this robustness required; consensus to be developed and achieved from the full range of built environment stakeholders (each with different priorities and perspectives); management of the delivery of work by hundreds of volunteers working around other pressing commitments; and striving to back up all decisions with data as far as possible.
16 |
What would happen if the "bottom up performance levels" and "top down pathways" didn't meet?
The top-down budgets have been balanced with the bottom-up performance levels through appropriate redistribution of carbon and energy budgets.
Interaction & Impact
17
How does the Standard interface with existing Net Zero Carbon Standards for the UK Built Environment, such as the NHS NZ Standard, and the Scottish Net Zero Public Sector Buildings Standard?
The Standard is a voluntary document that can be used across the UK on many different building types. Requirements for healthcare buildings in the Standard will be aligned with the NHS NZ Standard as far as possible.
It is likely that following the publication of the Standard, other voluntary schemes, such as the RIBA 2030 Climate Challenge will be updated to align with the UK NZCBS target trajectories.
18
How does the Standard interface with the Science-Based Targets Initiative (SBTi) buildings target-setting tool?
The Standard is an asset-level set of performance requirements covering embodied carbon, operational energy, and several other Net Zero Carbon related metrics, for UK buildings. The SBTi buildings guidance provides a target setting approach at the corporate level for companies in the building sector, designed to be applicable globally.
19
How does the Standard interface with other existing voluntary targets such as LETI/RIBA 2030 Climate Challenge targets etc?
The Standard is the most thorough attempt by industry to set science-based NZC limits and targets for UK buildings. The limits and targets defined within the Standard will reflect the most up-to-date knowledge and expertise on what's needed to remain within 1.5°C warming scenario.
It is likely that following the publication of the Standard, other voluntary schemes, such as the RIBA 2030 Climate Challenge will be updated to align with the UK NZCBS target trajectories.
20
How does the standard interact with PAS 2080?
PAS2080 is a carbon management standard, whilst the UK Net Zero Carbon Buildings Standard sets the requirements for individual projects within the wider system of the UK built environment. The aim is for the Standard to be fully compatible with PAS2080 processes.
21
Does the Standard inform regulation?
This is a voluntary Standard for use by those wishing to describe a building as Net Zero Carbon. It could, however, be used to support policymakers in setting robust requirements that deliver buildings aligned with a 1.5°C decarbonisation pathway for the UK.
The Governance Board and Technical Steering Group are open to engagement with local and national planning authorities to enable this.
22
How does the Standard influence specification criteria?
The Standard can influence specification criteria for buildings through mandating certain performance limits, targets and requirements to allow buildings to be classified as Net Zero Carbon. These limits, targets and requirements can influence system and material choices and specifications.
Pilot Testing
23
Will the list of participating projects be made public? If so, what information will be shared?
No, project-specific data from the pilot phase will not be publicly disclosed. Any published findings will not be linked to individual projects unless agreed by all relevant parties.
24
Will any project-specific information be accessible to others participating in the Pilot testing network?
Whilst there will be roundtables as part of the pilot testing process, all data will be aggregated and anonymised unless agreed by all relevant parties.
25
If our project is not on track to meet the targets or criteria outlined in the pilot version, can we still apply?
Absolutely! We are interested to hear from a range of projects, including those that may not be on track to meet the targets set out in the Pilot Version. The pilot phase is a chance to test, learn, and improve – so your involvement will be valuable.
26
What level of input and resources will be required from participants, such as additional analysis or support? Will these resources be provided as part of the pilot process?
Whilst there will be a time commitment involved, we are seeking to make this as manageable and flexible as possible. As a rough guide, we expect 1 kick-off meeting, 2-3 roundtables per cohort, and a final summary session. These details are still being finalised and will depend on the number of participating projects, their sectors and project stages. Further information about the pilot will be shared during the kick-off meeting, where participants will also have the opportunity to provide feedback and shape the process.
We don’t expect you or your teams to produce much more than you would in the normal course of your business. Additionally, no prior data preparation is required for the first meeting to ensure a straightforward and seamless start.
27
Does participation in the pilot phase result in formal verification of the building?
No, the pilot phase is focused on testing and refining the Standard rather than verification, which we will be developing in tandem with the Pilot Testing. However, there will be opportunities to showcase your involvement and share the insights you gain throughout the process. This is also an excellent opportunity to gain an understanding of verification, preparing you and your building for launch of Version 1 of the Standard.
28
Will projects passing the design criteria receive any temporary recognition while final verification is pending?
No, as outlined in the Pilot Version of the Standard, this is not a design standard and as such, there will be no temporary recognition for projects meeting design criteria.
29
Are the reporting requirements in the Pilot Testing as per the submission requirements of the Standard?
From Version 1 of the Standard, applicants will be required to report on all mandatory submission requirements within this version. However, recognising that this is a Pilot Phase, there will be some flexibility to accommodate real-world challenges and limitations as we work collectively to refine the Standard.
30
What are the benefits of participating in the pilot?
Project participants can benefit from participating in the pilot in the following ways: ​
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Have the opportunity to test their project against the rules of the Standard, and assess what evidence will be required to demonstrate conformity in the future
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Compare notes and learn from other participants with projects at a similar stage of evolution and/or in the same sector/geography
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Receive guidance and feedback from members of the Technical Steering Group (TSG) who wrote the rules of the Standard
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Provide feedback to the TSG and the authors of Version 1 of the Standard to assist with its final drafting
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Ready their projects for full verification against Version 1 when it is published next year, along with the verification regime, or understand what you need to achieve in order to conform to the Standard.