The UK Net Zero Carbon Buildings Standard
The UK Net Zero Carbon Buildings Standard is a voluntary standard applicable to new build, existing buildings and retrofits.​
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It is science-led, created by the industry, for the industry, through an unprecedented collaborative effort.
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Version 1 was published in March 2026.
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It has been updated for clarity and usability following Pilot Testing and wider industry feedback. It includes additional Annexes covering landlord- and tenant-only routes to verification, and an optional verified check at Practical Completion to determine whether a building is on track. A summary of changes can be found in Resources.
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If you have any comments about version 1, please submit your feedback via this survey.
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Verification to the Standard will open soon, in Q2 of 2026.​​​​
The Standard Version 1 - Resource Suite
Read about the updates that have been made since the Pilot Version in this summary:
Submission Proforma​
​The proforma is a dedicated Excel file which captures the numerical evidence required to demonstrate conformity with the Standard. Two proformas will be available to download here shortly:​
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Standard Conformity: Use this for verification against the UK NZCBS Version 1.​
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PC-On-Track: Use this version for the PC on Track verified checks (Annex E).
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The Submission Proforma will be available soon.
How to Use the Standard - Flowchart​
​This flowchart guides project owners and design teams considering the Standard through the key stages of demonstrating conformity. It outlines the specific requirements for various project types and stages. This is designed as a summary and should be read in conjunction with the main Standard.
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Verification Primer
This Primer explains the latest developments on how the verification framework and methodology are expected to operate. It includes explanations of the verification process, evidence requirements, and pricing. Read this to be ready to verify for when it becomes available.
