Rooftop solar installations in Scotland no longer require planning permission after the Scottish Government's overhaul of permitted development rights (PDRs) came into force on 24 May 20241. The change removes the previous 50 kilowatt upper limit for permitted rights on domestic and non-domestic buildings, above which full planning permission was required1.
Solar Energy Scotland, the industry body, said the change had been campaigned for over several years1. Its chair, Thomas McMillan, said:
"Simplifying the planning process for rooftop solar will make a substantial difference to Scotland delivering 6GW of solar by 2030."
The new rules also cover flat roof systems, which can be installed under permitted development provided they do not protrude more than 1m from the roof surface1. Solar in conservation areas can be permitted development under certain circumstances, such as not being on primary elevations or affronting roads1. Only World Heritage sites and listed buildings are exempt from the changes1.
Other changes include free-standing solar panels permitted within the curtilage of non-domestic buildings, up to 12sqm, and relaxed restrictions for solar canopies, which no longer require their primary purpose to be powering electric vehicle chargers1. Solar Energy Scotland said industry aims to continue dialogue with the Scottish Government on whether the 12sqm curtilage limit could be extended in future1.
The change follows the removal of non-domestic rates for rooftop solar in the previous year's budget, which industry also campaigned for1. Scotland and England have now both removed an upper limit to their PDR guidelines, though Solar Energy Scotland noted there are differences based on building type and that regulation in each nation should be followed1.
| Change | Detail |
|---|---|
| Upper limit removed | Previously 50kW for rooftop solar on domestic and non-domestic buildings1 |
| Flat roofs | Permitted if not protruding more than 1m from the roof surface1 |
| Conservation areas | Permitted under certain circumstances, such as not on primary elevations or affronting roads1 |
| Exemptions | World Heritage sites and listed buildings1 |
| Free-standing panels | Permitted within the curtilage of non-domestic buildings, up to 12sqm1 |
| Solar canopies | No longer required to have powering EV chargers as their primary purpose1 |
Why it matters for households
For a householder in Scotland, the practical effect is that a rooftop solar installation no longer needs planning permission on the basis of system size, where it previously would have once it exceeded 50kW1. The planning rules for home energy equipment in Scotland now sit within a broader permitted development framework, and the solar panel planning permission in Scotland position has changed accordingly.
The removal of the upper limit matters most for larger domestic and non-domestic rooftops, where a bigger array can now proceed without a full planning application1. For flats and shared buildings, the position depends on the building type and circumstances, and the rules on solar panels on flats in Scotland set out where permitted development may apply. Flat roof installations are covered provided they do not protrude more than 1m1, and the flat roof solar permitted development rules explain the protrusion condition. Where panels are mounted on a pitched roof, the limits on how far solar panels can protrude remain relevant.
Solar Energy Scotland said the change would speed up deployment and help reduce the cost of running residential and commercial buildings, with energy costs described as continuing to be stubbornly high1. The body also linked the change to Scotland's target of 6GW of solar by 20301. Uptake across the UK nations is tracked in the microgeneration uptake by nation data.
What happens next
Solar Energy Scotland said industry aims to continue dialogue with the Scottish Government on whether the 12sqm curtilage limit for free-standing panels on non-domestic buildings could be extended in future1. No date has been reported for that discussion.