Knowledge base
Can a flat have a pergola under permitted development?
Why the England householder outbuilding allowance does not apply to flats and maisonettes.
Do not use the normal England householder outbuilding allowance for a flat or maisonette. Planning Portal expressly says those permitted development allowances apply to houses, not flats or maisonettes, so ask the local planning authority whether the pergola needs a planning application.
That applies even if the flat has a private garden. Planning status and ownership are separate: exclusive use of the garden does not turn the building into a dwellinghouse for this permitted development class.
You may also need the freeholder's or landlord's written consent. A lease can restrict structural work, alterations to outside areas or fixings into the building. That private permission does not replace planning permission, and a planning approval does not override the lease.
For a shared garden, establish who owns and controls the land and whether other leaseholders must agree. A wall-mounted design also affects the building fabric, so the owner may require structural information, insurance details and an approved contractor. Do not drill into a shared wall or lay foundations until those rights are clear.
Wales likewise states that its listed outbuilding allowances apply to houses rather than flats or maisonettes. Northern Ireland and Scotland have their own planning systems. Begin with the council for the property's nation and describe the home accurately as a flat or maisonette.
Sources
- Planning Portal: outbuildings — accessed 14 November 2026.
- GOV.WALES: planning permission for outbuildings — accessed 14 November 2026.
- nidirect: planning permission — when to apply — accessed 14 November 2026.
Read the main pergola planning guide and compare wall-mounted and freestanding pergolas.