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Do I need planning permission for a conservatory? 

Aluminium black Conservatory
Sky lantern

Conservatories fall under the same planning rules

as any other extension to your home.

'Permitted development' allows for certain

developments to be undertaken without planning

permission. These developments must fall within

certain requirements. If you wish to go beyond the

requirements, you will require planning permission.

(The rules are different for properties on designated


  • To be covered by

permitted development

any conservatory within

two metres of a

boundary must not be

higher than 3 metres.

  • Maximum eaves height

should be no higher than

the eaves of the existing

house. The highest part

of the conservatory

should be no higher than

the roof ridge line of the

existing house.

  • For a detached house

any rear conservatories

must not exceed more

than four metres of the

original property, for any

other residential property

it is 3 metres

  • The Conservatory must

not exceed 50% of the

land around the original

house (or how it stood

on the 1st July 1948)

this calculation must

include any sheds or


  • The Conservatory can not be forward of the

original principle or side

elevation of the house or

highway fronting to fall

under permitted


  • Side conservatories must

not exceed 50% of the

original house and be no

higher than four metres.

Where the property is not in designated land (Article

2(3)) * or a Site of Special Scientific Interest, this limit is

increased to eight metres if a detached house; or six

metres for any other house.

These increased limits are subject to the neighbour

consultation scheme. This requires that the relevant

Local Planning Authority is informed of the proposed

work via a prior approval application.

Permitted developments only apply to houses

(bungalows) not flats, maisonettes or other buildings

If unsure always check with the local council before undertaking any alternation/building work.

uPVC Conservatory
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