Solar Planning Permission in Milton Keynes
Most roofs in MK need no permission at all. The limits changed on 27 August 2026, and the exceptions are local.
Figures below are read from SI 2026/896 on legislation.gov.uk, not from coverage of it. England only.
The default: you probably do not need permission
Solar on a house is permitted development in most cases. These are the limits, taken from the instrument rather than from coverage of it.
On a wall
Equipment may project 0.4m beyond the face of the wall — doubled from 0.2m on 27 August 2026. Where the wall abuts a highway, the 0.2m limit still applies.
On a pitched roof
No more than 0.2m beyond the roof slope, and never above the highest part of the roof.
On a flat roof
No more than 0.6m above the highest part of the roof — which covers most ballasted frames on the flat-roofed MK estates.
Free-standing in the garden
Panel area capped at 9m². Height limit is 1m within 5m of a boundary and forward of the principal elevation, 2m within 5m of a boundary or in a conservation area near a highway, and 4m otherwise.
The transitional window
Anything permitted before 27 August 2026 but not after can still be built until the end of 26 August 2027.
England only
Scotland, Wales and Northern Ireland run separate regimes. These figures are England.
When you do need permission in Milton Keynes
Conservation areas
MK has 27. Stony Stratford (1975), Olney and Newport Pagnell (both 1969) and Woburn Sands (2003) are the ones we are asked about most. A roof slope fronting a highway may need consent where the same panels on the rear would not.
Listed buildings
Listed building consent is separate from planning permission and is required regardless of permitted development. Assume you need it.
Article 4 directions
These withdraw permitted development rights for a defined area. They are not obvious from the street — the council's planning map is the only way to know.
Flats and maisonettes
Class A splits houses from blocks of flats, and the flat rules are tighter. If you do not own the roof, you need the freeholder as well.
Ground-mounted over 9m²
Above the Class B limit you are into a full application.
New builds under condition
Some MK estates carry planning conditions on external alterations. Check your deeds before assuming permitted development applies.
What Plan:MK asks of new development
Policy SC1 of Plan:MK covers sustainable construction, supported by the Sustainable Construction Supplementary Planning Document adopted on 23 November 2021. The SPD sets out how applicants reduce regulated carbon emissions, incorporate renewable or low-carbon generation, and offset what is left.
That applies to development coming forward, not to solar you retrofit to an existing home. If you are buying on a new MK estate it is worth asking the developer what they did to satisfy SC1 — a token array sized to pass a calculation is common, and is rarely the array you would have chosen.
From March 2027 the Future Homes Standard raises the floor nationally, requiring solar on virtually all new homes in England.
Not sure whether yours needs consent?
We check the designation before quoting, not after. If your roof needs an application we will tell you at survey rather than halfway through the job.
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