Heat Pump Installation Guide: New 2025 Regulations 

There has never been a better time for homeowners to make the switch to a more renewable heating system. As of 20th May 2025, new regulations in England have made the installation of heat pumps simpler and more flexible than ever before.  On 20th May 2025, new regulations came into effect in England that make the installation of heat pumps simpler and more flexible than ever before. 

Whether you’re a homeowner planning an upgrade or an installer navigating the latest  regulations, this guide breaks down everything you need to know about installing an air source heat pump (ASHP) under the updated 2025 guidelines. 

1. No More 1-Meter Boundary Rule

One of the biggest changes is the removal of the 1-meter boundary rule. Previously, every heat pump installation had to place the unit at least one metre from the property boundary, a challenge for homes with limited outdoor space. 

With this restriction lifted, homeowners have the freedom to position the heat pump closer to fences, walls, or boundaries, allowing for more efficient layouts and making installations possible in tighter spaces, such as side alleys or small gardens. 

2. Larger Heat Pumps Are Now Permitted

The new rules have increased the maximum unit size from 0.6m³ to 1.5m³ — more than double the previous limit. 

Why does this matter? Larger units can deliver greater power and efficiency, making them ideal for bigger homes or those with higher heating demands. Best of all, these larger systems can now be installed without the need for planning permission, streamlining the entire installation process. 

3. Two Heat Pumps Allowed for Detached Homes

If you live in a detached home, the update brings even better news. The regulations now allow up to two air source heat pumps to be installed under permitted development rights. 

This update supports cascade systems, where two units work together to meet heating needs more efficiently. It also gives homeowners more flexibility in managing different heating zones or expanding their systems in the future. 

4. All Heat Pumps Must Be “Smart-Ready”

In line with the UK’s push towards smarter, more responsive energy use, all new heat pump installations must use units that are “smart-ready.” 

This means they must be able to connect with smart grids and adjust their operation based on energy demand or time-of-use tariffs. In practical terms, this could allow your heating system to automatically run when electricity is cheapest, helping reduce both carbon emissions and your energy bill. 

The Navien PEM750 Heat Pump is a smart heating solution that perfectly combines eco-friendly R290 refrigerant with a global warming potential (GWP) of 3 with inverter technology to produce efficient house heating and hot water even in extreme cold climates. 

5. MCS Certification Is Still Required

While the rules have relaxed, the quality expectations have not. MCS certification remains mandatory for all heat pump installations. 

MCS certification guarantees that your heat pump has been installed safely and performs efficiently. It’s also a must if you plan to take advantage of any government incentives or grants available for low-carbon heating. 

6. Noise Standards Still Apply

The removal of the 1-meter boundary rule does not mean anything goes. Heat pumps must still comply with the 42 dB noise limit at the nearest property boundary. 

The updated MCS Planning Standards now include stricter noise assessments, but modern models like the PEM750 Heat Pump are designed to operate quietly. Installers can use acoustic shielding or strategic placement to ensure compliance. 

7. Notifying Neighbours Isn’t Usually Required

Another change that simplifies installation: you no longer need to notify neighbours when installing a heat pump, provided your system meets permitted development criteria. 

That said, it’s still a good idea to keep your neighbours in the loop, especially if work will take place near shared boundaries. A quick heads-up can go a long way toward maintaining good relations. 

Why These Changes Matter for Heat Pump Installation

The updated 2025 rules remove some of the biggest hurdles homeowners faced when considering a heat pump installation. By making the process more accessible, especially for homes with space constraints or higher energy needs, these changes support the UK’s broader push toward net-zero heating. 

Ready to Install a Heat Pump? We’re Here to Help

As a trusted name in heating, we’re here to help guide you through every step of your heat pump installation journey. From choosing the right heating system to ensuring it meets the latest regulations and MCS standards, our team is committed to making t transition to low-carbon heating simple and stress-free. 

Have questions about installing a heat pump under the new rules? Get in touch today for expert advice, product recommendations, and help finding a certified installer near you.