The most common planning question on commercial solar canopy projects is also the most consequential: does this canopy need planning permission, or is it Permitted Development? Getting this wrong costs time and money — either by applying for permission you didn’t need (adding 8–12 weeks and £2,000–£8,000 in fees) or by building without consent you should have had (potentially requiring retrospective planning and structural alteration). This guide covers the rules as they apply in 2026.
The Core Rule: Class A of Schedule 2 to the GPDO 2015
Commercial solar canopies in England are assessed under Class A of Schedule 2, Part 14 of the Town and Country Planning (General Permitted Development) (England) Order 2015 (the GPDO 2015). Class A covers the installation, alteration, or replacement of solar PV or solar thermal equipment on a building or within the curtilage of a building.
The critical term is curtilage. A solar canopy installed in the curtilage of a commercial building — that is, within the land forming part of the building’s site, such as a car park on the same site as the building — qualifies for Permitted Development consideration under Class A.
For structures that are not ancillary to an existing building (e.g., a standalone solar canopy in a field), Class A does not apply and planning permission is required.
When a Commercial Solar Canopy IS Permitted Development
A commercial solar canopy is Permitted Development under Class A if all of the following conditions are met:
1. Location in the curtilage of a commercial building The car park or hardstanding over which the canopy is installed must form part of the same site as the commercial building being served. A car park separated from the main building by a public road requires careful assessment of whether it is within the building’s curtilage.
2. Height under 9 metres above ground level The canopy must not exceed 9 metres in height at any point, measured from natural ground level. Most standard commercial car park canopies (3.5m–5.5m eave height) are well within this limit.
3. Not on a listed building or within its curtilage If the commercial building is listed, or if the canopy site is within the curtilage of a listed building, Permitted Development rights under Class A do not apply. Listed Building Consent (and potentially full planning permission) is required.
4. Not in a World Heritage Site Class A Permitted Development rights are removed in World Heritage Sites. A small number of commercial properties sit within WHS buffer zones — Canterbury city centre businesses, for example.
5. Not on Article 4 Direction land Local planning authorities can withdraw Permitted Development rights in specific areas using Article 4 Directions. Conservation areas and town centre designated areas frequently have Article 4 Directions. Check the local LPA’s Article 4 map.
6. Equipment must be removed when no longer needed This is a standard condition under Class A — the canopy must be removed and the site restored if it ceases to be used for solar generation. This condition does not practically affect well-maintained commercial canopies but should be noted in the contract and site documentation.
When Planning Permission IS Required
Full planning permission is required in the following circumstances:
1. Listed Buildings and Their Curtilage
Any solar canopy on a listed building’s site requires both Listed Building Consent (for changes affecting the character of the listing) and potentially full planning permission for the canopy itself.
2. Conservation Areas with Article 4 Directions
Inner London boroughs (Westminster, Kensington and Chelsea, Islington), historic market towns, and many cathedral cities have Article 4 Directions that remove Class A PD rights within designated conservation areas. A substantial majority of town centre car parks in these areas require full planning permission.
3. Scheduled Ancient Monuments
Any structure within the scheduled area of an Ancient Monument requires Scheduled Monument Consent — effectively mandatory full planning and conservation authority involvement.
4. Exceeding Height Limits
Any canopy above 9 metres in height requires full planning permission. This affects very few commercial designs (most are 4–6 metres eave height) but can affect designs with raised structural sections over HGV lanes.
5. Standalone Structures Not in Curtilage
Any solar canopy not in the curtilage of an existing commercial building — including canopies on open land, field carparks, or sites where no associated building exists — requires full planning permission.
Scotland, Wales, and Northern Ireland
Scotland: The equivalent Scottish PD order (Town and Country Planning (General Permitted Development) (Scotland) Order 1992) provides broadly similar PD rights but with some differences. Pre-application confirmation with the local authority is always recommended for Scottish projects.
Wales: Welsh permitted development legislation broadly mirrors England’s, but Welsh planning policy (TAN 8) is actively supportive of renewable energy at all scales. Planning officers in Welsh LPAs are generally experienced with canopy applications.
Northern Ireland: The Planning (General Development) Order (Northern Ireland) 2015 governs PD rights in NI. The rules differ from England’s — pre-application confirmation is essential for all NI projects.
Pre-Application Confirmation: Why It Matters
The practical advice for all commercial solar canopy projects is to obtain written pre-application confirmation of Permitted Development status from the local planning authority before committing capital to a project. This costs £100–£400 (depending on LPA fee schedules) and takes 2–4 weeks, but it provides written authority that cannot be challenged retrospectively.
We carry out the PD confirmation process as part of our standard feasibility service — it is included in the free feasibility report we provide to all enquiries.
What “Prior Approval” Means for Larger Canopies
For certain classes of solar installation above specified thresholds (details vary by structure type and scale), Permitted Development requires Prior Approval from the LPA — meaning you must notify the LPA and wait for them to confirm that no prior approval is needed, or that the design details they require are acceptable. Prior Approval is not planning permission — it is a simpler, faster process. We manage Prior Approval applications as part of the planning service.
The Practical Process
Our standard planning process for a commercial solar canopy:
- Desk research (day 1–3): Check the LPA’s Article 4 map, conservation area boundaries, listed building register, and Scheduled Monument data for the site. Takes 2–3 hours per site.
- Pre-application letter to LPA (week 1–2): Formal written request for confirmation of PD status. Most LPAs respond within 3–4 weeks.
- Confirmation or planning route (week 4–6): If PD confirmed, proceed. If not, we advise on full planning application requirements and manage the application.
- Full planning application (where required): Typically 8–12 weeks from submission to decision at LPA level, plus 4 weeks for pre-submission design. A Design and Access Statement, Heritage Impact Assessment (where relevant), and Structural Methodology Statement are standard supporting documents.
The average planning approval rate across our canopy projects is over 95%. The 5% of applications that are refused are mostly in conservation area contexts where design modifications (reclad steelwork, lower eave height, different panel specification) resolve the LPA’s concerns at appeal or re-submission.
Getting planning certainty is step one of any canopy project. Request a free feasibility and we’ll carry out the PD desk check and LPA pre-application process as part of the service — at no charge.
Also see: Solar Canopy Regulations | Solar Canopy Installation Process | Cost Guide