The government has announced a summer consultation on changes to permitted development rights intended to make it easier for households to install a heat pump1. The announcement was reported alongside a wider energy package covering electricity pricing reform, clean power and changes to the Boiler Upgrade Scheme2.
Nesta, a research and innovation foundation, analysed nearly 20,000 online planning permission applications in England, Wales and Scotland drawn from 260 council websites, using a custom in-house AI tool1. It estimates that from 2015 to 2026 households across Great Britain spent up to £8 million on heat pump planning permission applications and sound assessments combined1. Roughly £3 million to £4 million went on residential planning applications, with an estimated £2 million to £4 million on professional sound assessments1. More than 2,000 applications mentioned a BS4142 sound assessment, the UK standard for measuring the impact of sound on nearby areas, and these tests cost between £1,000 and £2,000 each1.
The analysis found that over 80% of applications were approved, including for listed buildings and those in protected areas1. Of the 11,550 residential applications where the heat pump was a factor in refusal, sound was the most common reason at 43%, followed by a lack of design information and appearance at 36% each, boundary rules at 7%, and highways and ecology at 3% each1. A quarter of refused applications included a public objection1. Almost all applications with a passed sound assessment, 91%, were approved; where the test was originally failed, about 35% were approved, 33% refused and 28% withdrawn1.
Katy King, director of Nesta's sustainable future mission, said:
"A significant proportion of people who want to get a heat pump are being forced to spend their valuable money and time on lengthy planning processes. Most applications are approved, so this raises questions about whether some people have wasted time and money having to go through the process and whether it can be streamlined to only require applications where they are absolutely necessary."
Heat Geek reports that most heat pump installations in England and Wales do not need planning permission, but that there are restrictions on where outdoor units can go and flats are often excluded entirely2. It states the government is consulting this summer on relaxing those restrictions and making installations easier in flats and non-domestic buildings, and describes the impact of any confirmed change as at least 12 to 18 months away2. Nesta suggests extending permitted development rights to Grade II listed buildings and developing a cheaper alternative to BS4142 sound tests1.
Why it matters for households
Planning is one of the points where a household's control over its own heating is decided by someone else. Where an installation falls outside permitted development rights, a homeowner must apply, wait, and in some cases pay for a sound assessment before a heat pump can go in. Nesta's figures put the combined cost of applications and sound tests at up to £8 million across Great Britain over eleven years, against an approval rate above 80%1. For a household, that is money and time spent on a process that usually ends in a yes.
The rules differ by property. Flats, listed buildings and homes in protected areas are the cases most likely to need consent, and the position in England is not identical to that in Wales and Scotland1. Sound is the single most common reason an application is refused, and the cost of demonstrating it falls on the applicant1. What the consultation proposes, and whether it changes anything for a given home type, has not been reported.
What happens next
The consultation is expected this summer1. Nesta's analysis covers applications from 2015 to 2026 and its recommendations on listed buildings and sound testing are suggestions, not commitments1. Heat Geek reports that new permitted development rights for EV home charging are being legislated this summer, with a right-to-charge consultation to follow2. No date has been given for the outcome of the heat pump consultation, and no draft text of the proposed changes has been published.