What the 2025 Heat Pump Rule Changes Mean for UK Homeowners

If you're thinking about installing a heat pump in Cheshire or anywhere in England, recent changes to planning rules have made it significantly easier.

As of 29 May 2025, the UK government updated permitted development rights for air source heat pumps. These changes are designed to cut red tape and allow more homeowners — especially those with limited space — to access cleaner, low-carbon heating.

Let’s break down what the new rules mean for your home.

 1. The One-Metre Rule Has Been Scrapped

Old rule: You couldn’t install a heat pump within one metre of your boundary or neighbour’s wall without planning permission.
New rule (from May 2025): That restriction is gone.

What it means: If you live in a smaller property or urban area, you now have more flexibility to fit an air source heat pump — even if your garden or outdoor space is tight.

No more unnecessary delays or planning applications just because your heat pump sits near a fence or wall.

2. Bigger Heat Pumps Are Now Allowed

Old limit: Maximum unit size of 0.6 cubic metres.
New limit: Increased to 1.5 cubic metres.

What it means: You can now install a higher-capacity heat pump — perfect for larger homes or households with higher heating needs — without needing special approval.

This opens the door for more powerful, efficient systems to be installed under standard permitted development rules.

3. Two Units Allowed for Detached Homes

New rule: If you own a detached house, you can now install two heat pump units without planning permission.

What it means: Ideal for:

• Homes using separate systems for heating and hot water
• Hybrid setups with split loads
• Larger properties needing extra output

Semi-detached and terraced homes can still install one unit without permission — which suits most typical UK households.

4. Cooling Systems Now Covered

In the past, permitted development rules focused only on heating. Now, air-to-air heat pumps that provide both heating and cooling are included.

What it means: You can now install a dual-function heat pump — keeping your home warm in winter and cool in summer — without extra paperwork.

This is especially useful for south-facing homes or properties prone to overheating during heatwaves.

5. Noise Limits Still Apply

Although placement and size restrictions have eased, noise regulations remain in place. Installers must ensure your system stays within legal decibel limits when measured from your neighbour’s home.

What it means: You’ll still get a quiet system — and your installer will check compliance during the planning phase.

What This Means for Heat Pump Installation in Cheshire

These rule changes are great news for homeowners across the UK — and particularly useful for those in Cheshire towns and villages where space and planning can be a challenge.

You can now:

• Install closer to your boundary
• Choose a more powerful unit
• Install dual systems on detached homes
• Enjoy heating and cooling in one system
• Avoid most planning delays

It’s now faster, cheaper, and easier than ever to switch to a heat pump — whether you’re in a countryside cottage or a compact urban terrace.

Final Thoughts

The 2025 changes to heat pump planning rules are a big win for homeowners looking to cut their carbon footprint and heating bills. The government is clearly signalling: now is the time to switch.

Add to that the £7,500 Boiler Upgrade Scheme grant, 0% VAT until 2027, and rising energy prices — and you’ve got all the reasons you need to take the leap.

Ready to Install a Heat Pump in Cheshire?

At Cheshire Heat Pumps, we’ll guide you through the entire process — from choosing the right system to checking noise compliance and accessing grants.

Get in touch today to find out if your home qualifies under the new 2025 rules, and let us help you future-proof your heating system.