Question to the Ministry of Housing, Communities and Local Government:

To ask the Secretary of State for Housing, Communities and Local Government, what assessment has been made of the number of domestic boilers sold in England against the number of installations reported to local authority building control.

Neither the department nor the Building Safety Regulator (BSR) hold figures on boiler sales.

Figures held by the BSR show 1,089,862 total gas appliance work notifications between 1 October 2024 and 30 September 2025 under the Gas Safe Register scheme. Of this total, 1,039,920 was for central heating natural gas boiler installations. This is more than 95% of the total gas installation work. A much smaller number of other gas boiler installations, such as for water heaters or warm air heating appliances, were also registered.

The Gas Safe Register scheme is run by the Health and Safety Executive but the BSR has access to the scheme’s installation registration numbers.

The BSR regulates other installation schemes, also called competent person schemes, which include installation of non-gas types of boilers but neither the BSR nor the department hold figures specifically on non-gas boiler installations.

Local authorities must make available to the public details of building control notifications in their area including for boiler installations.