Plug-in solar and planning permission

Many people assume domestic solar always needs planning permission. In practice, much domestic microgeneration is treated as permitted development — but there are important exceptions, and the rules are not the same everywhere. This guide sets out the general position and the situations that need more care. It is general information, not legal advice.

One point applies regardless of planning: Plug-in solar has been legal to use in Great Britain since 27 August 2026, when SI 2026/848 came into force alongside Ofgem-approved changes to the G98 connection code — provided the kit is listed as compliant on the ENA Type Test Register. Northern Ireland is not covered. We cover the detail on the UK legal status page.

The general position

For many houses, installing domestic solar is treated as permitted development, meaning a full planning application is not required. This is a general rule rather than a guarantee, and it comes with conditions and limits. It is also not the only thing to consider — being permitted development does not, on its own, make plug-in solar legal to use in the UK.

Plug-in solar in England: the rules since 27 August 2026

Since 27 August 2026, England’s permitted development rules name plug-in solar directly (SI 2026/896). Plug-in solar is not permitted development, so it needs planning permission, where any part of it would be installed:

• on a wooden fence, gate, wall or other means of enclosure;
• on a wooden wall, balcony or enclosure; or
• on any part of a house or block of flats that is clad in timber.

The government says these limits are to reduce the risk of fire spreading. For houses, the same order lets panels on a wall or balcony protrude up to 0.4 metres (0.2 metres where the wall or balcony abuts a highway, such as a pavement or road), and allows free-standing panels within 5 metres of the boundary if they are no more than 2 metres high, or 1 metre in front of the house. Listed buildings, scheduled monuments and some positions in conservation areas and World Heritage Sites remain excluded. The order applies in England only; in Wales and Scotland, ask your council. See our news story on the new rules.

When planning needs more care

Some situations are treated differently and are more likely to need permission or extra checks:

• Conservation areas — additional controls often apply, particularly to equipment visible from a road.
• Listed buildings — alterations can require separate consent, and the bar is higher.
• Flats and maisonettes — these are frequently outside the usual householder permitted development rules.
• Front elevations and boundaries — equipment on a principal or side elevation facing a highway, or near a boundary, can be treated differently.

Designations such as World Heritage Sites and other protected areas may add further requirements. Because the detail depends on your property and location, treat the list above as a prompt to check rather than a definitive answer.

Check with your Local Planning Authority

The reliable way to be sure is to ask your Local Planning Authority — usually your local council's planning department. They can confirm whether permission is needed for your specific property and proposed setup, and whether any local designations apply.