Knowledge base
How high can a pergola be near a boundary?
The England boundary-height rule, what counts as the whole structure, and why other UK nations differ.
For a house in England, Planning Portal says an outbuilding within 2 metres of the curtilage boundary has a maximum height of 2.5 metres if it is to stay within the stated permitted development limits. Measure the finished pergola, not just the posts or the height printed in a product name.
The highest physical point is what matters for that near-boundary limit. Include the roof frame, louvres when they stand proud, gutter details, post caps and any raised base. A pergola shown as 2.5 metres in a shop heading may have a different overall dimension on its technical drawing.
First establish where the legal boundary is. A fence can sit wholly on one owner's land and is not proof of the title line. The planning test uses the boundary of the dwellinghouse's curtilage, not the distance to a neighbour's wall. If the line is uncertain, check the property information and take advice rather than moving the measurement to a convenient fence face.
The England figures do not transfer across the UK. mygov.scot describes a different distance for similar garden buildings in Scotland, while GOV.WALES publishes its own set of conditions. Northern Ireland directs householders to the council planning office to check whether work is permitted development.
Even below a national limit, an Article 4 direction, planning condition, listed status or designated location can change the answer. The local planning authority decides whether a specific proposal needs an application.
Sources
- Planning Portal: outbuildings — accessed 14 November 2026.
- mygov.scot: sheds, garages and similar buildings — accessed 14 November 2026.
- GOV.WALES: planning permission for outbuildings — accessed 14 November 2026.
See putting a pergola next to a boundary, pergola height and headroom and the glossary definition of curtilage.