Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, how many homes have had insulation measures carried out under the ECO4 and GBIS schemes since 2022.

ECO4 started in April 2022. To the end of December 2025, 294,456 insulation measures were installed under ECO4 (including ECO3 Interim and Surplus Actions). This is published in Table 1.6 of Household Energy Efficiency Statistics, headline release: February 2026. This total includes some Surplus Action measures installed before 2022.

GBIS started in March 2023. To the end of December 2025, 94,847 insulation measures had been installed under GBIS. This is published in Table 3 of Great British Insulation Scheme release: February 2026,

Under these schemes, some properties may have had more than one type of insulation measure installed.