Planning permission for conservatories:The
following notes are intended for guidance only, and
are general requirements for all areas. Please consult
the relevant local authority for any specific requirements
for the area concerned.
Builders permission:On some
new housing estates the developers sometimes insert
a clause in the deeds requiring their permission to
extend the house. This should be checked and in some
cases a small fee may be charged to obtain permission.
Definition of a conservatory:According
to the Department of the Environment, a conservatory
is defined as "A building that has not less than
seventy five percent of its roof area made of translucent
material, and not less than fifty percent of its wall
area made of glass."
Planning permission:This is
the decision as to whether or not you can build a particular
structure in a particular place, and it is concerned
with the visual impact and size of the structure. Not
the structural integrity of the construction.
Specific planning permission is not normally
required if the following guidelines are met :-
1. A detached or semi-detached dwelling may be extended
without planning permission (subject to the following
conditions) by up to 70m³ or 15% of the volume
of the original house, whichever is the greater (to
a maximum of 115m³). If in a conservation area
this is reduced to 50m³ or 10% of the volume of
the original house. Extensions added after 1948 are
added into the permitted volume unless they are over
5 metres from the house.
2. A terraced house (or a house in a national park,
an area of outstanding natural beauty, a conservation
area o r other specially designated area) may be extended
up to 50m³ or 10% of the volume of the original
3. The overall height of the conservatory must not
exceed 4m when the conservatory is less than 2m from
any boundary. If greater than 2m from any boundary,
the height of the conservatory may equal the height
of the house.
4. The conservatory is used solely for domestic purposes.
5. The roof and walls of the conservatory are glazed
with translucent or transparent materials with safety
glazing at low level (see definition of a conservatory
6. No part of the conservatory should be closer to
the highway than the nearest part of the original house
unless there would be at least 20m between the house
(as extended) and the highway.
Application for planning permission IS
required if :-
1. The proposed conservatory
is on any wall fronting the highway. Note: Highway includes
all public footpaths, bridleways and byways. This includes
rear entry paths if it is possible for someone to enter
the path in one location and exit in a different location.
2. The property is a listed building or in a conservation
3. The property is non-residential or anything other
than a single dwelling.
4. The conservatory is higher than any part of the
5. The conservatory and other additions to the original
house exceed 50% of the total area of the garden within
the boundaries of the property.
6. Eaves, fascias, foundations or guttering encroach
over the boundaries of the property.