Do I Need Planning Permission for a Heat Pump in the UK?

The Short Answer

For most UK homeowners, no — you do not need planning permission to install a heat pump. Air source heat pumps fall under permitted development rights, meaning installation can proceed without a formal planning application, provided certain conditions are met. The key requirements are: a single unit per property, no more than 0.6 cubic metres in volume, not on the front elevation, and compliance with MCS 020 noise standards.

There are exceptions for listed buildings, conservation areas, and flats — this guide covers all of them.

Related reading: How much does a heat pump cost in 2026? | Air source heat pump vs gas boiler: running costs compared

Permitted Development Rights for Heat Pumps

Permitted development rights allow homeowners to make certain changes to their property without applying for full planning permission. Air source heat pumps were added to these rights to encourage the uptake of renewable heating.

Under the current rules (as of 2026), you can install an air source heat pump on a domestic property in England without planning permission, subject to the following conditions:

Condition 1: Only one heat pump per property

You are allowed one air source heat pump per property under permitted development. If you want to install a second unit, you will need to apply for planning permission.

Condition 2: Volume limit

The heat pump unit (including any housing or enclosure) must not exceed 0.6 cubic metres in volume. This covers virtually all domestic air source heat pumps on the market today, which are typically around 0.3–0.5 cubic metres.

Condition 3: Not on a pitched roof

The heat pump must not be installed on the roof of a building unless it is a flat roof. Wall-mounted and ground-level installations are fine. In practice, the vast majority of domestic heat pumps are installed at ground level adjacent to an external wall.

Condition 4: Not within 1 metre of the property boundary

If the heat pump is installed on a building, it must be at least 1 metre from the boundary of the property. For ground-level installations in the garden, this rule does not technically apply under the current wording, but it is good practice to maintain a reasonable distance from neighbours.

Condition 5: Not in front of the principal elevation

The heat pump must not be installed on a wall or structure that fronts a highway — in simple terms, not on the front of your house facing the road. Side and rear elevations are fine.

Condition 6: Not on a site designated as a scheduled monument

If your property is a scheduled ancient monument, permitted development rights do not apply.

Condition 7: Compliance with MCS 020 Planning Standards

The installation must comply with the MCS 020 Planning Standards, which set noise limits for heat pumps. This is the condition that requires the most attention.

Noise Limits and MCS 020

Noise is the primary concern in planning terms. Heat pumps contain a compressor and a fan, and while modern units are significantly quieter than older models, they do produce some sound.

What is the noise limit?

Under MCS 020, the sound pressure level from the heat pump must not exceed 42 dB(A) at the nearest neighbouring window or door of a habitable room. This is measured at 1 metre from the neighbour’s window.

To put 42 dB(A) in context: - A quiet library: 30–40 dB(A) - Normal conversation: 50–60 dB(A) - A modern heat pump at 1 metre distance: 40–50 dB(A)

How is this achieved?

Meeting the 42 dB noise limit depends on:

• The heat pump model — modern units produce between 40 and 55 dB(A) at 1 metre from the unit itself
• Distance from neighbours — sound drops off with distance; doubling the distance reduces noise by approximately 6 dB
• Positioning — placing the unit away from neighbouring windows helps enormously
• Acoustic barriers — in tight spaces, acoustic fencing or enclosures can reduce noise further

An experienced installer will carry out a noise assessment as part of the system design. At Electromatic M&E Ltd, we use manufacturer sound data and distance calculations to ensure every installation meets MCS 020 requirements before we begin work.

Related reading: How loud is a heat pump? Real noise levels explained

Conservation Areas

If your property is in a conservation area, the permitted development rules are more restrictive.

In a conservation area: - The heat pump must not be installed on a wall or roof that faces and is visible from a highway - The unit must be positioned so it has minimal visual impact from public viewpoints - All other standard conditions still apply

In practice, this usually means positioning the heat pump on the rear or side elevation, which is what most installations do anyway. It is unusual for a conservation area designation to prevent a heat pump installation entirely — it may just limit where the unit can be placed.

You can check whether your property is in a conservation area by searching your local council’s planning portal or contacting their planning department.

Listed Buildings

If your property is a Grade I, Grade II*, or Grade II listed building, the situation is more complex.

Permitted development rights for heat pumps do not apply to listed buildings. This means you will need to apply for listed building consent before installing a heat pump, regardless of where on the property you plan to put it.

The process involves: 1. Submitting a listed building consent application to your local planning authority 2. Providing details of the proposed installation, including location, model, and visual impact 3. The planning authority will assess the impact on the building’s historic character and significance 4. A decision is typically made within 8 weeks

In our experience, listed building consent for heat pumps is usually granted, provided the unit is positioned sensitively — typically at the rear of the property, not visible from the public realm, and with no physical alterations to the listed fabric of the building.

Flats and Maisonettes

If you live in a flat or maisonette, the permitted development rules are different. You generally do not have the same automatic permitted development rights as a house, because:

• External alterations to a block of flats typically require planning permission
• You may also need the freeholder’s consent or agreement from the management company
• Shared external areas may be subject to a lease or management company rules

If you own a flat and want to install a heat pump, speak to your freeholder or managing agent first, and be prepared to submit a planning application.

When You Definitely Need Planning Permission

To summarise, you will need to apply for planning permission if:

• Your property is a listed building (listed building consent required)
• You want to install the heat pump on the front elevation facing a highway
• You want to install more than one heat pump on the property
• You live in a flat or maisonette and do not have permitted development rights
• The unit exceeds 0.6 cubic metres in volume
• You want to mount it on a pitched roof
• The noise assessment shows the installation cannot meet the 42 dB limit at the nearest neighbouring habitable room

The Planning Application Process

If you do need planning permission, the process is straightforward:

1. Submit an application to your local planning authority (usually done online)
2. Application fee: approximately £230 for a householder application in England (2026 rates)
3. Supporting documents: site plan, elevation drawings, noise assessment, and a design and access statement
4. Consultation period: neighbours and relevant bodies are consulted (typically 21 days)
5. Decision: usually within 8 weeks for a standard householder application
6. Approval: if granted, you can proceed with installation subject to any conditions

Your installer can often help with the application, providing technical specifications and noise data. At Electromatic M&E Ltd, we support customers through the planning process when it is required, including preparing noise assessments and technical submissions.

Scotland, Wales, and Northern Ireland

The rules described above apply to England. The devolved nations have their own planning frameworks:

Scotland

Permitted development rights for heat pumps apply in Scotland with similar conditions. The volume limit is 0.6 cubic metres, and the unit must not be on the principal elevation. Noise limits are assessed under Scottish planning guidance.

Wales

Wales also allows heat pumps under permitted development with similar conditions to England. The BUS Grant of £7,500 (subject to eligibility) applies in Wales as well.

Northern Ireland

Permitted development rules in Northern Ireland are slightly different. Check with your local planning office (the relevant council) before proceeding.

Practical Tips for a Smooth Installation

Based on our experience installing heat pumps across Greater London, Surrey, and Middlesex, here are some practical tips:

Talk to your neighbours

You are not legally required to notify your neighbours, but it is good practice. Explain what a heat pump is, show them how quiet modern units are, and point out where it will be positioned. This prevents complaints later and maintains good relationships.

Choose a quiet unit

Modern heat pumps from leading manufacturers operate at 40–48 dB(A) at 1 metre. Choosing a quieter model gives you more flexibility in positioning and a better margin against the 42 dB noise limit at your neighbour’s window.

Position it carefully

Work with your installer to find the optimal position — ideally: - Away from neighbouring windows - On a solid, level base with anti-vibration mounts - With good airflow around the unit (no enclosure that restricts air) - Accessible for future maintenance

Keep records

Your installer will provide documentation including the noise assessment, MCS certificate, and commissioning report. Keep these safe — they may be needed for future property sales or if any planning questions arise later.

How Electromatic Can Help

Electromatic M&E Ltd offers free home surveys across London and Surrey (TW, KT, SW postcodes). We handle BUS Grant applications (subject to eligibility), install ASHP and solar PV from a single contractor, and deliver within 2–4 weeks of survey confirmation. All work is carried out under MCS certification via our accredited umbrella partner. Where planning permission or listed building consent is required, we can support the application with noise assessments and technical documentation.

Book your free home survey →

Call us: 07718 059 284 | Email: admin@electromatic.uk

Frequently Asked Questions

Do most homeowners need planning permission for a heat pump?

No. The vast majority of air source heat pump installations in England fall under permitted development rights and require no planning application. The key conditions are: one unit per property, volume under 0.6 cubic metres, not on the front elevation, not on a pitched roof, and compliance with MCS 020 noise limits. Listed buildings and some flats are exceptions.

What is the noise limit for a heat pump under permitted development?

Under MCS 020 Planning Standards, the sound pressure level from the heat pump must not exceed 42 dB(A) at the nearest neighbouring habitable room window, measured at 1 metre. Modern heat pumps from leading manufacturers typically produce 40–50 dB(A) at 1 metre from the unit itself. An experienced installer will carry out a site-specific noise calculation before installation.

Can you install a heat pump in a conservation area?

Yes, in most cases. In a conservation area, the heat pump must not be visible from a highway. In practice, this usually means positioning it at the rear or side of the property, which is standard practice for most installations. The designation rarely prevents a heat pump installation — it may simply restrict placement options.

Do you need planning permission for a heat pump in a listed building?

Yes. Permitted development rights do not apply to listed buildings. You must apply for listed building consent from your local planning authority before installing a heat pump. The process typically takes up to 8 weeks, and consent is usually granted provided the unit is positioned sensitively and does not alter the listed fabric of the building.

Can a flat owner install a heat pump without planning permission?

Not always. Flats typically do not benefit from the same automatic permitted development rights as houses. Flat owners usually need both planning permission and the freeholder’s consent before installing a heat pump. If you own a leasehold flat, check your lease and contact your managing agent or freeholder first.

The information in this article is for general guidance only and does not constitute financial, legal, or technical advice. Planning rules are subject to change and vary by local authority. Always verify current permitted development conditions with your local planning authority before proceeding. The Boiler Upgrade Scheme (BUS) grant of £7,500 is subject to eligibility criteria set by Ofgem — not all properties qualify. Electromatic M&E Ltd operates under MCS certification via an accredited umbrella partner. All installations comply with Building Regulations Part L and MCS standards. E&OE.

Written by Electromatic M&E Ltd — ASHP & Solar installer, London & Surrey (electromatic.uk)

Last updated: April 2026 | Electromatic M&E Ltd, Company No. 13837345