Why Cornwall
Solar Panels in Cornwall: Sunshine, Planning & National Landscape Rules
Cornwall is one of the strongest parts of the UK for solar, both for the sunshine it gets and for how the planning rules generally work in your favour.
Solar irradiance
Cornwall gets more sun than most of the UK.
How much a solar panel system generates depends heavily on solar irradiance: the amount of solar energy a location receives over a year, usually measured in kWh per kWp of installed panel capacity. Cornwall is consistently ranked among the highest-irradiance parts of the UK, typically around 1,000 to 1,050 kWh/kWp per year, compared to a UK-wide average of roughly 900 kWh/kWp and around 750 to 850 kWh/kWp in parts of Scotland.
All else being equal, higher annual solar resource can increase generation compared with an equivalent system farther north. Actual financial payback still depends on installation cost, household usage, export rates and electricity tariffs, as well as your roof’s orientation, pitch and any shading, which is why every quote starts with a proper site survey rather than a generic estimate.
Cornwall’s annual solar irradiance. National UK average is roughly 900 kWh/kWp, and 750–850 in parts of Scotland.
Planning permission
Cornwall National Landscape and your roof.
Most homes in Cornwall fall under permitted development for solar panels, meaning no planning application is needed, even within Cornwall National Landscape (the area formerly known as the Cornwall AONB). National Landscape status does not remove permitted development rights for domestic solar installations.
There are a few situations where permission is needed:
Listed buildings
Always require listed building consent, even where otherwise permitted development.
Conservation areas
Rules can differ by elevation and exact site conditions. Installs facing a highway more often need a householder application than rear or side installs, but we check the property before confirming what applies.
Protrusion limits
Panels generally can’t protrude more than 200mm from the roof plane, or be fitted to a chimney.
We check all of this as part of your survey, so you’ll know exactly where your property stands before any work begins. You can also read Cornwall Council’s own planning guidance for solar panels.
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