Energy Company Obligation: SAP and RdSAP Amendments

Closed 11 Sep 2023

Opened 15 Aug 2023


The Energy Company Obligation: SAP and RdSAP Amendments consultation sets out proposals for mid-scheme amendments to the Energy Company Obligation (ECO) schemes, ECO4 and the Great British (GB) Insulation Scheme, both of which will run until March 2026.

Read the consultation document on GOV.UK. 

We are proposing amendments to legislation so that both schemes use the latest versions of the Standard Assessment Procedure (SAP) and Reduced Data SAP (RdSAP). We are seeking views on transitional arrangements in relation to these changes. There are 11 questions in total.

We would like to hear from a wide range of stakeholders, including:

  • energy suppliers
  • energy efficiency installers
  • other scheme participants with views on the proposals 

The consultation covers ECO4 and GB Insulation Scheme for the period spring 2024 to March 2026.


  • SMEs (small and medium businesses)
  • Large businesses (over 250 staff)
  • Trade bodies
  • Installer
  • Energy assesor
  • Regulator


  • Energy efficiency