Heat Pumps in London
Independently writtenLondon homeowners face some of the highest energy bills in the UK — but the capital's relatively mild winters make it one of the better regions for air source heat pumps. With the £7,500 BUS grant, many London homes can switch from gas for less than the cost of a new kitchen.
London at a glance
5.2°C
Average winter temperature
Source: Met Office
2150
Heating degree days
Source: Regional data
£823/yr
Est. heat pump running cost
Source: Ofgem rates Q1 2026
£-29/yr
Est. saving vs gas
Source: Calculated
Housing in London
Victorian and Edwardian terraces, post-war semis, modern flats, and period conversions. Many homes have solid walls requiring external or internal insulation before a heat pump performs at its best.
Heat pump costs in London
An air source heat pump in London typically costs £8,000–£15,000 before the £7,500 BUS grant. After the grant, most London homeowners pay £500–£7,500.
Running costs depend on your property size and insulation. For a typical 3-bed semi in London, expect to pay around £823 per year to run a heat pump — compared to £794 for gas heating. That's a saving of approximately £-29 per year.
London's mild climate means lower heating demand and higher heat pump efficiency — you'll get more heat per unit of electricity here than in colder regions.
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