The list
- ONS Census 2021, TS046: type of central heating
Households by heating type in each borough, Liverpool and England and Wales, taken from Nomis by council code.
- ONS Census 2021, TS044: accommodation type
Semi-detached, terraced, detached and purpose-built flat households, used for every house-type figure.
- ONS Census 2021, TS054: tenure
Owned, social rented and private rented households, used on the renting page, the selector and the comparison.
- DESNZ, sub-national estimates of properties not connected to the gas network
The 2024 share of domestic properties with no gas meter in each borough and in Liverpool.
- DESNZ, Boiler Upgrade Scheme statistics
Vouchers paid by local authority, May 2022 to September 2026, and the North West and England and Wales totals and application rates.
- Ofgem, Boiler Upgrade Scheme: property owners
Grant amounts, the higher band, the off-gas definition and the capped-meter rule.
- GOV.UK, Boiler Upgrade Scheme eligibility
Who can apply, and the exclusions for social housing and most new builds.
- GOV.UK, Warm Homes: Local Grant allocations
The city region's allocation to the Liverpool City Region Combined Authority (£31,805,813, list updated 2 July 2026).
- DESNZ, Warm Homes: Local Grant policy guidance (July 2026)
Eligibility routes, the EPC band, tenure rules, landlord contributions, cost caps and who appoints installers.
- Knowsley Council, Warm Homes: Local Grant
Knowsley's statement that the combined authority administers and manages the scheme.
- Sefton Council, Retrofit
The Retrofit Team's delivery to April 2028, eligibility and the GOV.UK application route.
- Liverpool City Council, Warm Homes: Local Grant
Liverpool's own scheme, shown for comparison only.
- legislation.gov.uk, Part 14 of the General Permitted Development Order
Class G and Class C and their conditions.
- planning.data.gov.uk, listed buildings
Listed-building record counts for each borough and Liverpool, read on 3 November 2026.
- MCS, find a certified installer
Linked as the place to check an installer.
How the numbers are made
Census shares divide the households in a category by all households in the borough and round to one decimal place; small categories such as LPG are shown to two. The off-gas share is the government's published 2024 percentage for each borough, shown as published. A grant rate divides the Boiler Upgrade Scheme count by the borough's census households and multiplies by 1,000. The England and Wales rate divides the national count, 96,185, by the census households of England and Wales. Totals for "the five boroughs" leave Liverpool out.
The census extracts are saved with the site's code so the figures can be rebuilt and checked. The council pages are quoted as they read on the day; where a page did not say whether applications were open, the site says that intake is not confirmed.
Limits
The census describes March 2021, before the Boiler Upgrade Scheme opened. The off-gas estimates count properties without a meter, not what they burn. The grant statistics count vouchers paid, not heat pumps installed by other means. None of them describes a particular home, and where the site links two figures, such as owner-occupation and grants paid, it says the statistics give no reasons.
If something has changed
Council pages and scheme statuses change faster than anything else here. If you find a source that now says something different, tell us through the form; we check it and update the page and its date. Until then, the source is right.