Solar Carports in Conservation Areas: The Planning Route

The 2023 proposal to exclude conservation areas was dropped

When Class OA was inserted into Part 14 of the GPDO by S.I. 2023/1279, in force 21 December 2023, the consultation had floated excluding article 2(3) land. It was not carried through. A solar canopy in an area lawfully used as off-street parking in a conservation area, National Landscape, National Park, the Broads or a World Heritage Site can therefore proceed under Class OA, subject to prior approval.

What the prior-approval test adds on article 2(3) land

Everywhere, OA.2(3) requires the authority to consider siting, design and external appearance, and specifically the impact of glare. On article 2(3) land it also considers the effect of the canopy's appearance on that land. In practice that means the application stands or falls on detail: column treatment and finish, the visible edge of the deck, cable and inverter locations, lighting, and sightlines from the street and from any heritage asset.

Where Class OA stops

Four exclusions matter most. Any part of the canopy above 4 m. A car park inside, or within 10 m of, the curtilage of a dwellinghouse or block of flats. Land on or within the curtilage of a scheduled monument. And the curtilage of a listed building — that one is excluded outright, so a full application follows, with listed building consent considered separately where works affect the building itself.

The procedure and the clock

Class J's procedure applies: the authority has 56 days, after which approval is deemed; a site notice runs for at least 21 days or adjoining owners are notified; the development must be completed within three years; and where the canopy sits over a permeable surface, run-off must discharge to a permeable area. Where a full application is needed instead, the current NPPF policies on renewables and on designated heritage assets are the ones to cite — the framework was republished on 17 August 2026 with coded policies, so older paragraph numbers no longer resolve.

What to do first

Establish three facts before design work starts: the height you need for the vehicles using the car park, the distance to the nearest residential curtilage, and whether any part of the site is in a listed building's curtilage. Those decide whether you are in Class OA at all. If you are, the design work is what wins the approval — see the guide to solar carports for the structural and grid specification that goes with it.

Related reading: commercial solar carports · why full expensing does not cover solar · solar panels over parking bays.