Solar Panels and Planning Permission: A UK Homeowner’s Guide

As more UK homeowners look to solar power to reduce their energy bills and environmental impact, questions about the rules surrounding installation are common. The good news is that for most households, the process is straightforward and doesn’t involve a lengthy planning application. The government has actively sought to simplify the regulations to encourage the adoption of renewable energy.

This guide will walk you through the essentials of planning permission for domestic solar panels in the UK. We cover when you do and don’t need it, what to do if your property is in a conservation area or is a listed building, and how to apply for permission if it is required. Understanding these rules is the first step in a smooth installation process, which starts with assessing your property in our guide, ‘A Homeowner’s Guide to Roof Suitability for Solar Panels’.

Do You Need Planning Permission for Solar Panels?

In most cases, you will not need to apply for planning permission to install solar panels on your home. Most domestic solar panel installations are considered ‘permitted development’, which means they have a pre-existing grant of planning permission under national rules. This applies to installations on detached, semi-detached, and terraced houses, as well as on the roofs of outbuildings like garages or sheds.

These permitted development rights are designed to cut the red tape and long waits that could otherwise be a barrier to generating your own clean electricity. However, to qualify, your installation must meet a specific set of criteria.

Permitted Development Rights Explained

Permitted development rights allow homeowners to make certain improvements without a formal planning application. For solar panels, the rules are set out in The Town and Country Planning (General Permitted Development) (England) Order 2015. The conditions vary depending on whether the panels are on a roof or free-standing in your garden.

Roof-Mounted Solar Panels

For solar PV (photovoltaic) or solar thermal panels mounted on the roof of your house or an outbuilding, the following conditions apply:

• The panels must not be installed higher than the highest part of the roof (excluding any chimney).

• They must not protrude more than 200mm from the roof slope or wall surface.

• On a flat roof, they must be set back at least 1 metre from the external edges and must not protrude more than 0.6 metres (60cm) above the plane of the roof.

• As far as is practical, the panels should be sited to minimise their effect on the building’s external appearance and the amenity of the area.

• When no longer needed for microgeneration, the panels must be removed as soon as reasonably practicable.

Ground-Mounted Solar Panels

If you are considering installing free-standing solar panels in your garden, the following permitted development rules apply:

• You are limited to a single ground-mounted installation for your property.

• The array must not exceed 9 square metres in size.

• No part of the installation can be more than 4 metres high.

• It must be located at least 5 metres from the boundary of your property.

• It cannot be installed within the boundary of a listed building.

When You Will Need to Apply for Planning Permission

You must apply for planning permission if your proposed solar panel installation does not meet all of the permitted development criteria. For example, if you want to install a ground-mounted array that is larger than 9 square metres, or if your roof-mounted panels will protrude more than 200mm, you will need to seek approval from your local council.

The situation is also different if you live in a flat or maisonette, as permitted development rights do not apply. Because the roof is a shared space, you will need permission from the building’s freeholder or management company. You will also likely need to apply for full planning permission from the local authority.

Rules for Special Properties

If you live in a property with special protections, such as a listed building or in a conservation area, the rules are stricter to preserve the area’s character.

Listed Buildings and Scheduled Monuments

If your home is a listed building, you will need to apply for Listed Building Consent to make any alterations that might affect its special character, and this includes installing solar panels. Permitted development rights do not apply. It is essential to speak to your local planning authority’s conservation officer at an early stage. According to Historic England, a sensitive, well-justified proposal is more likely to be approved.

In some cases, the main roof of a listed building may not be a suitable location. You might need to consider alternatives, such as a less prominent roof slope or a discreet ground-mounted array. The rules are similarly strict for properties that are or contain a scheduled monument.

Conservation Areas, National Parks and AONBs

Permitted development rights are more restricted in conservation areas, National Parks, Areas of Outstanding Natural Beauty (AONBs), and World Heritage Sites. The key restriction is that you cannot install solar panels on a wall or a roof slope which fronts a highway. Any installation must be designed to have the minimum possible visual impact.

Some areas are also subject to an ‘Article 4 Direction’, which removes some permitted development rights to protect local character. If your property is covered by one, you will need to apply for planning permission for work that would otherwise be allowed. You can check with your local council to see if any Article 4 Directions apply to your home.

How to Apply for Planning Permission

If you have established that you need planning permission, the next step is to submit an application to your local planning authority. For most people in England and Wales, the easiest way to do this is through the government’s online Planning Portal.

Your application will need to include detailed plans of your proposed installation, showing the size and location of the panels and explaining how you have minimised any visual impact. You can typically expect a decision within 8 weeks for straightforward applications, though more complex cases can take up to 13 weeks. There is a fee for a householder planning application; for example, Historic England noted a fee of £206 in England in 2021. Many reputable solar installers can handle the planning process on your behalf, a service worth considering when you read our guide, ‘How to Choose a Solar Panel Installer’.

What If I Install Panels Without Permission?

It is crucial not to proceed with an installation until you have the correct permissions. If you carry out work without required planning permission or Listed Building Consent, your local authority can take enforcement action. This could result in a fine and an order to remove the panels at your own expense.

A lack of proper permissions can also cause significant delays and complications when you come to sell your home. Remember, even if your installation is a permitted development, it must still comply with all relevant building regulations and electrical safety standards.

Frequently Asked Questions

What About Installing Solar Panels on a Flat?

Permitted development rights do not apply to flats and maisonettes. You will need to get permission from the building’s freeholder or management company, as the roof is a communal part of the building. You will also almost certainly need to apply for full planning permission from your local council.

Do I Have to Remove the Panels When I Sell My House?

No. The condition to remove panels “when no longer needed for microgeneration” refers to them becoming derelict or obsolete, not to the sale of the property. Solar panels are considered a fixture and an asset that typically adds value to a home. They are sold with the property, and the new owner can continue to benefit from them.

Are the Planning Rules Different in Scotland, Wales, and Northern Ireland?

Yes, planning is a devolved matter, so the rules differ across the UK. This guide primarily covers the system in England. Whilst Wales shares the Planning Portal, its specific policies can vary and are set out by the Welsh Government. Scotland has its own distinct system of permitted development rights, detailed on the mygov.scot website. In Northern Ireland, guidance is available from NI Direct. Always check the specific rules for your nation.

A Clear Path to Solar Power

For the majority of UK homeowners, installing solar panels is a straightforward process that falls under permitted development rights. By understanding the rules - especially if you live in a listed building or conservation area - you can ensure your installation is a smooth and rewarding process.

Once you’ve confirmed your planning situation, you can focus on the practicalities. Our guides ‘How Many Solar Panels Do I Need?’ and ‘A Guide to the Smart Export Guarantee (SEG)’ can help you plan the perfect system and understand how you can get paid for the electricity you export to the grid.