Heat pump noise Level Rules might be getting a rethink
Key takeaways
Ed Miliband wants to remove planning restrictions around heat pump noise level rules
Current limits require systems to stay under 42 dB at the property boundary
Rules can delay or block projects entirely in smaller properties
What is Ed Miliband saying about heat pump noise levels?
Ed Miliband has made it clear that he wants to remove unnecessary barriers to installing heat pumps and is particularly focused on the current noise regulations, which he believes are standing in the way of wider adoption. He’s promised to review the rules and, if needed, relax them, so long as any changes wouldn’t lead to real disturbance.
"My overall approach would be to say where there are barriers, let’s get rid of them if we possibly can. If the noise thing is a barrier, obviously subject to making sure there isn’t a disturbance to people, which I don’t think there will be, we should act on that."
According to the Energy Secretary, around one in three heat pump installations currently require planning permission, even when the systems are producing noise “comparable to a computer.” It’s a stat that highlights the disconnect between planning policy and real-world performance.
Back in May, the government removed the one-metre boundary rule for permitted development in England and Wales. This means that as long as a heat pump meets the noise requirement, its location within the property no longer matters.
But for Miliband, that doesn’t go far enough. He wants to make sure that unnecessary red tape doesn’t prevent heat pump adoption.
What are the current rules around noise levels?
In England, air source heat pumps can be installed under permitted development if they meet certain criteria. One of those is the noise limit.
Under current rules, a heat pump must not exceed 42 decibels at the nearest habitable room of a neighbouring property, measured at the boundary.
What makes it tricky is that this limit applies at all times, day or night. Even if the system is only slightly over, planning permission could be needed.
Why is noise such a big deal?
For the vast majority of owners, heat pumps are generally very quiet, especially modern models. In most cases, you won’t hear anything from inside the property.
The issue is how the noise is predicted. Installers have to calculate the sound pressure level at the boundary, which depends on the unit, how it’s installed, the distance from neighbours, surrounding walls or fencing, and the layout of the property.
This often leads to one of two outcomes:
- The installer has to rework the design to make it compliant (adding time and cost).
- The homeowner has to apply for planning permission, which adds delays and uncertainty.
So while air source heat pump noise isn’t something most people notice in daily life, it’s a big deal when it comes to ticking all the planning boxes.
Will this make life easier for installers?
If Ed Miliband gets his way and the noise rules are scrapped or relaxed, it could make things much simpler for installers, especially those working in built-up areas. No more noise assessments, fewer delays, and less need for enclosures or planning applications.
It’s not just good news for engineers. Homeowners benefit too, because they can move faster and make use of Boiler Upgrade Scheme without being held back by planning.
Of course, system design still matters. Noise performance varies by brand, and proper placement is key. But without restrictive planning rules, it would be easier to get the job done right the first time.
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