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Homeowner guidance

Do I Need Planning Permission For A Heat Pump?

Air source heat pumps are increasingly common — many installations may be permitted development, but size, position, noise and property restrictions can mean planning permission is needed.

Published: June 2025 · Last reviewed: 24 June 2025

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The 10-second answer

Do heat pumps always need planning permission?

No. Many air source heat pumps may fall within permitted development limits on houses.

What matters most?

Unit size, distance from boundaries, noise and visibility from the street.

Does England differ from Scotland?

Yes. Heat pump permitted development limits differ between countries.

Do ground source heat pumps need planning permission?

Often less visible — but boreholes and external equipment may still need checks.

Which route might apply?

You may be looking at permitted development if:

  • The heat pump unit is within permitted development size limits.
  • The property is a house with no special restrictions.
  • The unit is positioned to meet distance and noise requirements.
  • Only one unit is proposed (limits apply to the number of units).

This does not automatically mean permitted development applies. Every property and proposal is different and still needs to be checked.

You may need planning permission if:

  • The project is larger or more prominent.
  • The property is listed or in a conservation area.
  • The property is subject to an Article 4 direction or other local restriction.
  • The proposal exceeds permitted development limits.
  • The unit is oversized, too close to a boundary or on a listed building.

Many projects require planning permission, but the answer depends on the individual circumstances.

Part of our solar panels and heat pumps overview. For costs, heat pump costs. Overview: planning permission vs permitted development.

What affects whether a heat pump needs planning permission?

Air source heat pumps extract heat from outside air. Permitted development (national rules that may allow certain works without a full planning application) covers many domestic installations within limits on size, position and number of units.

  • Unit size — volume of the external heat pump unit
  • Position — distance from boundaries and visibility from the street
  • Noise — permitted development often includes noise-related conditions
  • Number of units — limits on how many heat pumps can be installed under permitted development
  • Property restrictions — listed buildings, conservation areas and flats

For solar alongside a heat pump, see solar panel planning permission. For costs, heat pump costs guide.

England and Scotland: heat pump differences

Permitted development limits for heat pumps differ between England and Scotland. Prior approval (a simplified council check on specific issues) may be required for some installations in England — see prior approval explained.

See planning permission in England and planning permission in Scotland.

Factors that can change the answer

Typical homeowner examples

These examples illustrate common situations. They are not formal determinations and do not guarantee an outcome.

Standard air source heat pump beside the house

A typical wall-mounted or ground-mounted unit may fall within permitted development on an unrestricted house if size and position limits are met.

Heat pump on a listed building

Listed building consent is usually required. The unit's visibility and impact on the building's character will be assessed.

Large heat pump close to a neighbour's boundary

Distance from boundaries and noise can mean planning permission is needed even when the unit is not especially large.

How to check your property

Before relying on general guidance, check the property and proposal together.

  1. Confirm the property type. Houses, flats and maisonettes are often treated differently for permitted development.
  2. Check whether the building is listed. Listed building consent and planning permission may both be needed.
  3. Check whether the property is in a conservation area or other restricted area. Local restrictions such as Article 4 directions can remove some permitted development rights.
  4. Review the size, position and design of the proposal. Measurements, previous additions and neighbour impact all matter.
  5. Remember that planning permission and building regulations or a building warrant are separate. You may need both. See our guide to building regulations vs planning permission or building warrant vs planning permission.

Planning Digital helps bring these checks together so you can understand the likely planning route before going further.

Common mistakes

  • Assuming a neighbour's project means yours is allowed — each property is assessed on its own facts.
  • Ignoring previous additions that may have used permitted development allowances.
  • Confusing planning permission with building regulations or a building warrant — see building regulations vs planning permission.
  • Relying on generic online advice without checking address-specific restrictions.
  • Committing to builders or suppliers before understanding planning constraints on the site.
  • Ignoring prior approval requirements for some heat pump installations in England.

Frequently asked questions

Is an air source heat pump permitted development?

Often on unrestricted houses within size and position limits.

What is prior approval for heat pumps?

A simplified council process checking specific issues like noise and position. See prior approval explained.

Do ground source heat pumps need planning permission?

The external plant may be less prominent, but borehole drilling can need separate permissions. Check your specific proposal.

How can I check my heat pump installation?

Use Planning Digital's Project Planner. Review heat pump costs guide.

Check your own heat pump project

Size, position and property restrictions affect the route. Planning Digital helps you check before installation.

Try it on my house
Try it on my house