Mounting

Where you are allowed to physically fix a plug-in solar panel depends on the surface, your tenancy status, your building, and - more than many guides mention - which of the UK's four nations you are in. This page covers the physical fixing rules and the planning-permission picture, including where England, Scotland, Wales and Northern Ireland genuinely differ.

A plug-in solar kit must connect directly into a wall socket. Do not use extension leads, multi-way adaptors, travel adaptors or RCD adaptors - the Interim Product Specification requires a direct plug-to-socket connection. See Extension leads for why.

Where you can mount one

Balcony railThe most common fixing - a bracket clamped to the rail, panel vertical. Not on a timber balcony
Exterior wallBracket-mounted, vertical or slightly angled. Not on timber or combustible cladding, or a wall shared with a neighbour
Flat roofAngled, ballasted frame - height-limited (see below)
Pitched roofFlush or near-flush, minimal wall/roof projection
Ground / gardenFreestanding angled frame, no building fixing needed
Fence postPost-mounted bracket on a metal or masonry post - in England, plug-in solar on a wooden fence, gate or wall is not permitted development

Whichever surface you use: a proper rated bracket is required - fixings that rely only on cable ties, rope, string, tape, bungee cords or straps are not permitted. The Interim Product Specification also rules out fitting on aluminium or metal composite (ACM/MCM), high pressure laminate (HPL) or timber cladding, on timber balconies, and on buildings undergoing external wall or building-safety remediation. Panels must not be fixed to a wall that forms the boundary between your home and a neighbour's, and escape and rescue routes must be kept clear. Route cabling so it does not sit somewhere it can trap water, and consider wind loading for the specific location's exposure, not just the panel's weight (see Considerations).

Permitted development limits (England)

England's permitted development rules - the ones that let you fit small-scale equipment without a full planning application - were amended to cover plug-in solar specifically by the Town and Country Planning (General Permitted Development) (England) (Amendment) Order 2026, in force from 27 August 2026. They apply to houses and to blocks of flats:

  • Wall or balcony projection, generalUp to 40cm beyond the wall or balcony enclosure
  • Wall or balcony projection, next to a highwayReduced to 20cm
  • Pitched roof projectionUp to 20cm
  • Flat roof height limit60cm above the roof surface
  • Wood and timberPlug-in solar on a wooden wall, balcony, enclosure, fence or gate, or on timber-clad parts of a building, is not permitted development
  • Conservation areas and World Heritage SitesNot permitted on a wall, balcony or roof enclosure that fronts a highway

Source: SI 2026/896 (England only). Last checked: 29 October 2026. Always check the current detail with your council or the Planning Portal rather than relying solely on this summary - permitted development rights can also be removed in some areas by an Article 4 direction.

How England, Scotland, Wales and Northern Ireland differ

The plug-in solar reform is mostly a Great Britain change. The plug-safety part of the law (the Plugs and Sockets etc. (Safety) Regulations) applies UK-wide, but the connection rules that make self-install legal (the Electricity Safety, Quality and Continuity Regulations) and the G98 amendment cover Great Britain only. Northern Ireland has its own connection rules and network operator, and the Interim Product Specification says its application there is still under consideration. Planning permission for where you can physically mount a panel is separately devolved across all four nations. Neither of these facts is obvious from the DESNZ announcement alone, so they are set out plainly here:

🏴󠁧󠁢󠁥󠁮󠁧󠁿 England

Covered by the plug-in solar reform since 27 August 2026. Permitted development rights apply as above (amended for plug-in solar from the same date), administered under the Town and Country Planning regime - check Planning Portal for your specific property.

🏴󠁧󠁢󠁳󠁣󠁴󠁿 Scotland

Covered by the DESNZ plug-in solar reform (part of Great Britain). Planning permission is handled under Scotland's own planning system, separate from England's permitted development limits - check with your local authority or Scotland's planning guidance before assuming the England figures above apply.

🏴󠁧󠁢󠁷󠁬󠁳󠁿 Wales

Covered by the DESNZ plug-in solar reform (part of Great Britain). Wales runs its own planning regime with its own permitted development rules for solar equipment - see the Welsh Government's own solar planning guidance rather than assuming England's limits apply.

Northern Ireland

Not currently covered. The plug-safety change applies UK-wide, but NI's connection rules are set separately (the Electricity Safety, Quality and Continuity Regulations (Northern Ireland) 2012, and NIE Networks' own version of G98) and have not been changed for plug-in solar. The Interim Product Specification says its application in Northern Ireland "is subject to further consideration". Contact NIE Networks before connecting anything. NI also has its own separate planning system under the Department for Infrastructure. If you are in Northern Ireland, treat this whole section as "watch this space" rather than "the same rules apply" - see Registration for more on the registration gap.

England's permitted development rules now mention plug-in solar specifically. As of 29 October 2026 we have not found equivalent plug-in-specific changes for Scotland, Wales or Northern Ireland, whose rules were written around conventional rooftop PV. Always check current local guidance rather than treating any of the above as the final word for your specific property.

When you will still need planning permission, or someone's consent

  • Listed buildingsCheck with your council first - listed building consent is likely to be needed for anything fixed to the building, in all four nations
  • Conservation areasTighter limits than the standard permitted development figures - in England, nothing on a wall, balcony or roof enclosure that fronts a highway
  • Leasehold flatsNeed your landlord's or freeholder's permission, and often other leaseholders' agreement for anything fixed to a shared/communal structure like a balcony rail - this applies regardless of what planning law itself says
  • Certain cladding / buildings under remediationExcluded outright under the Interim Product Specification, not just a planning question: ACM, MCM, HPL or timber cladding, timber balconies, and buildings under external wall or building-safety remediation
  • Walls shared with a neighbourThe specification says panels must not be fixed to walls or parts of the building that form a boundary between homes
  • Shared or communal balconiesIf the balcony structure is not exclusively yours, get explicit agreement before fixing anything to it

Sources

Rules last checked: 29 October 2026, against the Interim Product Specification v2 (16 July 2026), SI 2026/848 and Ofgem's G98 decision of 11 August 2026. The specification has not been updated or replaced since July 2026.

This page is informational, not planning or legal advice. Planning rules change and vary by local authority - always confirm with your local planning authority or a planning professional before fitting anything to a listed building, in a conservation area, or on a shared structure.