Do you need planning permission for a pergola? In some circumstances, yes
Briefly

Many homeowners believe that adding a pergola to their garden is straightforward, but planning consultant Simon Rix notes that the rules are nuanced and context-dependent. Generally, homeowners may not need planning permission for pergolas falling within permitted development rights; however, there are restrictions on height and coverage of the garden. Special considerations apply based on location, such as conservation areas. Homeowners should always verify regulations with local authorities to avoid surprises, especially in specific cases like listed buildings or when attaching a pergola to a house.
It's a topic that crops up fairly often and is surprisingly nuanced depending on context.
Pergolas aren't specifically mentioned in the planning regulations, so interpretation can vary - always check locally.
You may need planning permission if you live in a listed building, conservation area, or want to build in your front garden.
If your pergola is attached to the house, it might be treated as an extension or veranda, which comes under different rules.
Read at Homebuilding
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