When solar PV is permitted development, when it isn't, and how the rules differ for England, Scotland, Wales and Northern Ireland.
For the great majority of UK homes, solar panels are permitted development — meaning you don't need a planning application. The permission is granted in advance by the planning regulations.
Cases that can need permission include: listed buildings, conservation areas in England (equipment on a wall, balcony or roof enclosure that fronts a highway), Article 4 directions, flats above the second floor, and any install in a designated National Park or AONB where the installer wants to be cautious.
Solar PV on a domestic property is permitted under Part 14 of the General Permitted Development Order, provided all of these are true:
Scotland: The Town and Country Planning (General Permitted Development) (Domestic Microgeneration) (Scotland) Amendment Order 2024 broadly mirrors England, but with looser rules in conservation areas — Scotland allows rear-elevation panels in conservation areas without an application, and England now does the same for roof panels, with England excluding equipment on a wall, balcony or roof enclosure that fronts a highway.
Wales: Permitted development rules track England closely; Cadw guidance applies for listed buildings.
Northern Ireland: Permitted development for solar is in place but the rules are tighter on AONBs — check with the relevant council.
Listed Building Consent is a separate, mandatory application for any external alteration to a listed building, including solar PV. Check the current application fee and timescale with your local planning authority. Most heritage officers prefer:
For a house in England, conservation-area designation alone does not exclude roof panels on any elevation: the general permitted-development limits still apply, as do listed-building restrictions and any Article 4 direction. The restriction now applies to panels on a wall, balcony or roof enclosure that fronts a highway — those need a planning application.
Source for the English conservation-area restriction: [the 2026 amendment, Article 3](https://www.legislation.gov.uk/uksi/2026/896/article/3/made). What counts as 'fronting a highway' is judged by the council's planning officer. Borderline cases — corner houses, semi-detached homes with side roads, terraces with high boundary walls — often need a pre-application consultation (free at most councils, takes 2–3 weeks).
Owner-occupied flats can install solar with the freeholder's written consent, and an MCS-certified installer who's comfortable with shared inverters. Leasehold flats need to check the lease for restrictions on roof access and external alterations.
Some larger blocks now retrofit shared solar with metering apportioned to each flat — the legal structure is more complex than it sounds and usually needs a solicitor to draft the side agreement.