Planning Permission for Solar Panels on Homes: The UK Rules

Permitted development rights allow certain types of building work without a full planning application, as long as specific limits and conditions are met. For solar on homes in England, the rules sit in Part 14 of the Town and Country Planning (General Permitted Development) (England) Order 2015, which was amended by a new order that came into force on 27 August 2026.

Under these rules, solar panels and solar thermal equipment on a house are generally permitted development if they stay within the size and position limits and the property is not excluded, for example because it is listed.

Permitted development also comes with general conditions. Equipment should, so far as practicable, be sited to minimise its effect on the appearance of the building and the amenity of the area, and it should be removed as soon as reasonably practicable when no longer needed.

Permitted development rights can be removed or restricted in some places, for example by an Article 4 Direction in a conservation area or by conditions on the original planning permission for a newer home. If you are unsure, check with your local planning authority before committing to an installation.

For a typical house with a pitched roof in England, roof-mounted solar is permitted development where:

• Projection: the panels project no more than 0.2 metres from the surface of the roof slope, measured perpendicular to the roof.
• Height: the highest part of the equipment is no higher than the highest part of the roof, excluding any chimney.
• Listed status: the house is not a listed building.

Most standard on-roof installations sit well within the 0.2 metre limit, because panels are mounted on rails close to the roof surface. In-roof systems, which replace tiles with panels set into the roof, sit flush with the surface.

There is no limit on the number of panels under these rules, as long as they stay within the projection and height limits. Panels can be fitted to front and rear roof slopes on most homes, although conservation areas and World Heritage Sites have extra restrictions, explained below.

Panels on outbuildings such as garages and sheds within the grounds of a house can also be permitted development under the same principles, subject to the same exclusions.

Flat roofs on extensions, garages and dormers are a common location for home solar, and the rules for them are more generous than many homeowners expect.

In England, solar equipment on a flat roof of a house can be permitted development where its highest part is no more than 0.6 metres above the highest part of the roof, excluding any chimney. That allows panels to be mounted on angled frames, which improves output compared with laying them flat.

Points to note:

• Designated areas: on land in certain designated areas, flat-roof installations may require prior approval from the local planning authority, a lighter process than a full application.
• Structure: frames on flat roofs are often held down by ballast or fixings, and the roof must be able to carry the extra load and resist wind uplift.
• Roof covering: check the condition and warranty of the flat roof membrane before panels are fitted, because replacing it later means removing them.

Flat-roof systems commonly use low-tilt frames facing south, or east-west rows that fit more panels into the space. Our guide to east-west versus south-facing solar explains the trade-off.

Wall-mounted solar is less common on homes, but it can be useful where roofs are unsuitable. Under the amended rules in England:

• Walls abutting a highway: equipment may project up to 0.2 metres from the wall.
• Other walls: equipment may project up to 0.4 metres.
• Conservation areas and World Heritage Sites: equipment is not permitted development on a wall, balcony or roof enclosure that fronts a highway.

The rules also include specific provisions on matters such as timber-clad walls, so check the detail for your home with your installer or local planning authority.

Stand-alone solar, such as a ground-mounted array in a garden, is covered by separate permitted development rules with their own limits on size, height and position. Stand-alone solar within the grounds of a listed building is not permitted development.

Wall-mounted and ground-mounted panels usually generate less per panel than a well-oriented roof, because of their angle or shading, so they are typically used where the roof is unsuitable rather than as a first choice.

You will normally need planning permission, or another form of consent, in these situations:

• Listed buildings: solar on a listed house, or on a building within its grounds, is not permitted development. You will need listed building consent and may also need planning permission.
• Exceeding the limits: panels projecting more than 0.2 metres from a pitched roof, rising above the highest part of the roof, or exceeding the flat-roof or wall limits.
• Conservation areas and World Heritage Sites: equipment on walls, balconies or roof enclosures fronting a highway.
• Article 4 Directions: where the council has removed permitted development rights in a particular area.
• Removed rights: where conditions on the original planning permission for your home remove permitted development rights, which is sometimes the case on newer estates.
• Flats: blocks of flats have their own rules, and individual flat owners usually need the freeholder's consent as well.

If any of these might apply, contact your local planning authority before you commit. A lawful development certificate can also confirm formally that a proposed installation is permitted development.

Many homes in conservation areas can still install roof-mounted solar under permitted development, as long as the panels stay within the projection and height limits. The key restriction is that solar equipment on a wall, balcony or roof enclosure fronting a highway is not permitted development in a conservation area or World Heritage Site.

Points to check:

• Article 4 Directions: some councils remove permitted development rights in sensitive conservation areas, meaning planning permission is needed for changes that would otherwise be allowed.
• Flat roofs: installations on flat roofs in designated areas may need prior approval.
• Visibility: panels on rear roof slopes facing away from the street are generally less contentious.
• Appearance: all-black panels and in-roof systems can reduce visual impact, which helps where consent is needed.

Our guide to roof orientation explains why a rear east or west-facing slope can still deliver worthwhile savings if the front slope is not suitable.

For more detail, see our guide to solar panels on listed buildings and in conservation areas.

The planning rules for solar differ across the UK:

• Wales: has its own permitted development rules for domestic solar, broadly similar to England but with differences in detail, including limits on installation above the ridgeline, projection and conditions for flat roofs, conservation areas and listed buildings.
• Scotland: has separate permitted development rules for domestic microgeneration, with their own conditions for conservation areas, listed buildings and flat roofs.
• Northern Ireland: has its own planning system and permitted development rules.

The principles are similar everywhere: most roof-mounted panels on ordinary homes do not need planning permission, while listed buildings and sensitive areas have stricter rules. The detailed limits differ, so check the rules for the nation where your home is located.

Your local planning authority's website, or the national planning portal for your nation, sets out the current rules. If you are close to a limit, or your home is in a designated area, contact the planning team before committing to an installation.

From 27 August 2026, compliant plug-in solar kits can legally be connected to a normal domestic socket in Great Britain. These small systems, often a panel or two mounted on a balcony, wall or garden frame, plug directly into a household socket rather than being wired into the consumer unit.

England's amended planning rules include provisions for plug-in solar alongside the rules for conventional systems. As with other solar equipment, extra restrictions may apply in conservation areas, World Heritage Sites and listed buildings.

Points to check before buying plug-in solar:

• That the product meets the relevant safety and connection requirements
• Where you can mount it under the planning rules for your home
• Whether your landlord or freeholder must consent, if you rent or own a flat
• How much it is likely to generate and save, as plug-in systems are much smaller than rooftop installations

Plug-in solar can suit renters and flat owners who cannot install a conventional system, but it is not a substitute for a full rooftop installation where one is possible. Our guide to how many solar panels you need explains typical system sizes for homes.

Planning permission is separate from several other approvals that apply to home solar:

• Building regulations: electrical work must comply with building regulations. Installers usually self-certify through a competent person scheme, and the roof must be able to carry the panels.
• Grid notification: the installer must notify or apply to the local network operator. Systems with an inverter output of 3.68kW or less on a single-phase supply connect under a simple notification process after installation.
• MCS certification: needed for Smart Export Guarantee payments and often expected by mortgage lenders.
• Leasehold consent: flat owners and some leasehold house owners need the freeholder's permission.
• Mortgage lender: some lenders want to know about significant alterations, particularly with battery storage or finance agreements.

Your installer should handle building regulations, grid notification and MCS certification as part of the job. Ask them to confirm each in writing.

Our guide to MCS certification explains why it matters and what paperwork to keep.

Before you sign a contract for solar panels, run through these checks:

1. Confirm which nation's rules apply: England, Wales, Scotland or Northern Ireland
2. Check whether your home is listed, including whether it is within the grounds of a listed building
3. Check whether you are in a conservation area, World Heritage Site or other designated area, and whether an Article 4 Direction applies
4. Check the planning history of your home for conditions removing permitted development rights
5. Confirm with your installer how far the panels will project and whether they stay below the highest part of the roof
6. For flats, check the lease and any freeholder consent
7. If you are unsure, apply for a lawful development certificate or contact your council's planning team

A good installer will check the planning position as part of the survey and tell you if permission is needed.

Our guides to home solar costs and roof orientation cover the next steps. When you are ready, compare quotes from up to three MCS-certified installers.