Do I Need Planning Permission for Solar Panels?

The planning rules for installing solar panels on your roof or in your garden, including when permitted development applies and the exceptions to be aware of.

Installing solar panels is one of the most common home improvements in the UK, driven by rising energy costs and environmental awareness. In most cases, solar panels can be installed under permitted development rights without planning permission - but there are important exceptions, particularly for listed buildings and properties in protected areas.

Rooftop Solar Panels: Permitted Development Rules

Solar panels (photovoltaic or thermal) installed on the roof of a house are permitted development provided:

• The panels do not protrude more than 200mm beyond the plane of the roof slope
• The panels are not higher than the highest part of the roof (excluding the chimney)
• The panels are not installed on a wall or roof slope that fronts a highway, if the property is in a conservation area, AONB, National Park, the Broads, or World Heritage Site
• The panels are not on a listed building

In practice, the vast majority of residential solar installations on standard pitched roofs meet these conditions easily. Modern flush-mounted panels typically protrude less than 100mm.

Ground-Mounted Solar Panels

Solar panels mounted on the ground (or on a flat roof at ground level) within the curtilage of a house are also permitted development, subject to these conditions:

• The installation must be no more than 4 metres in height
• It must not be within 5 metres of the boundary of the property
• The array must not exceed 9 m² in area
• No part of the installation can be forward of the principal elevation fronting a highway
• Only one stand-alone solar installation is permitted per property under PD

When Do You Need Planning Permission?

You will need to apply for planning permission if:

• Your property is a listed building - you will also need listed building consent. Even internal works that affect the character of a listed building can require consent
• The panels would be on a highway-facing roof or wall in a conservation area, AONB, National Park, World Heritage Site, or the Broads
• The panels exceed the size or height limits above
• You are installing on a flat (not a house) - flats have different PD rules
• An Article 4 Direction has removed solar panel PD rights

Solar Panels on Flat Roofs

Solar panels on flat roofs are treated as equipment and must not protrude more than 1 metre above the highest point of the roof (excluding the chimney). For houses, this is usually straightforward. For flats and commercial buildings, different rules apply.

Building Regulations

Solar panel installations do not normally require building regulations approval, but the installer should ensure compliance with:

• Part P (Electrical Safety) - the electrical connection must be done by a qualified electrician registered with a competent persons scheme (e.g. NICEIC, NAPIT)
• Structural loading - the roof must be able to support the weight of the panels. This is rarely an issue for modern roofs but may need checking on older properties

Most MCS-certified installers (Microgeneration Certification Scheme) handle building regulations compliance as part of their service.

Conservation Areas and Listed Buildings

If you live in a conservation area, you can still install solar panels under PD on rear-facing or side-facing roof slopes - only the highway-facing elevation is restricted. Many homeowners in conservation areas install panels on rear roof slopes without any issues.

For listed buildings, you will almost certainly need both planning permission and listed building consent. Some councils are becoming more sympathetic to discreet installations (e.g. slate-coloured panels on rear roof slopes), but this is assessed case by case.

Solar Panels and Neighbours

Solar panels do not normally cause issues for neighbours. However, glare from panels can occasionally be raised as a concern - particularly from ground-mounted arrays. If you are applying for planning permission, addressing potential glare in your application can prevent objections.

Battery Storage

Domestic battery storage systems (such as Tesla Powerwall) installed inside the house or in an outbuilding do not normally require planning permission. If the battery is housed in a new external structure, the outbuilding PD rules apply - see our guide on outbuildings and planning permission.

Financial Incentives

The UK government's Smart Export Guarantee (SEG) requires licensed electricity suppliers to pay you for surplus energy you export to the grid. Rates vary by supplier and tariff - shop around for the best SEG rate. Additionally, solar panels are currently zero-rated for VAT on residential installations (0% until 2027).