Councils are required to check the information on a BASIX certificate as part of their assessment of developments applications and applications for complying development certificates. Similarly, certifiers are required to check the information on a BASIX certificate prior to issuing a construction certificate or occupation certificate.
For further guidance about how to check BASIX certificates, councils and certifiers should refer to the BASIX Guide: Checking thermal performance for the Simulation method
For further information about using the planning portal, councils and certifiers should refer to How to manage your organisation administration account.
Last updated: 20/05/2025