Permitted Development Changes May 2013
The government as of the 30th May 2013 have made changes to
permitted development requirement for extensions for a 3 year
only ending 30th May 2016.
What are the differences?
You are essentially be able to build a larger extension, in some
instances provided that you could demonstrate that the proposed
extension can comply with the requirement set out below you
could build an extension to a terraced property of 6m and 8m for
an end of terrace that's almost as long as route master bus and
as wide as your house!
>> Start Here,
to get a feel for the type of permissions you may
require please use our handy tool below just select the
type of property you would like to extend
More for your money
Even though the permitted development allowance has doubled you
shouldn't expect the cost of the build to do the same. In fact a
6 meter extension would generally only cost around 25% more than
an extension of 3m, this is due the additional space is commonly
used for dinning rooms, bath rooms, and utility areas which
generally will only require a low level of fittings in
comparison to the initial cost of installing the kitchen and
Are you able to extend under permitted development?
New permitted development Rules.
An extension or addition to your house is considered to be
permitted development, subject to the following limits and
• No more than half the area of land around the "original
house"* would be covered by additions or other buildings.
• No extension forward of the principal elevation or side
elevation fronting a highway.
• No extension to be higher than the highest part of the roof.
• Single-storey rear extension must not extend beyond the rear
wall of the original house* by more than three metres if an
attached house or by four metres if a detached house. In
addition, outside Article 1(5) designated land* and Sites of
Special Scientific Interest the limit is increased to 6m if an
attached house and 8m if a detached house until 30 May 2016 and
these increased limits (between 3m and 6m and between 4m and 8m
respectively) and are subject to the
• Maximum height of a single-storey rear extension of four
• Extensions of more than one storey must not extend beyond the
rear wall of the original house* by more than three metres.
• Maximum eaves height of an extension within two metres of the
boundary of three metres.
• Maximum eaves and ridge height of extension no higher than
• Side extensions to be single storey with maximum height of
four metres and width no more than half that of the original
• Two-storey extensions no closer than seven metres to rear
• Roof pitch of extensions higher than one storey to match
• Materials to be similar in appearance to the existing house.
• No verandas, balconies or raised platforms.
• Upper-floor, side-facing windows to be obscure-glazed; any
opening to be 1.7m above the floor.
• On designated land* no permitted development for rear
extensions of more than one storey.
• On designated land no cladding of the exterior.
• On designated land no side extensions.
What is the neighbour consultation scheme?
This scheme only applies to larger single-storey rear extensions
which are permitted for three years between 30 May 2013 and 30
May 2016. This means that extensions of between four and eight
metres for detached houses and between three and six metres for
all other houses, must go through the process.
A homeowner wishing to build a larger single-storey rear
extension will need to submit a neighbouring consultation
Scheme in addition to a permitted development application.
If any adjoining neighbour raises an objection within the 21-day
period, the local authority will take this into account and make
a decision about
whether the impact on the amenity of all adjoining properties is
acceptable. so it will pay to have your neighbours on board,
round for tea, on your Christmas card list what ever it takes.
but seriously a suggestion that they could share your wall if
they ever decide to build an extension may improve your chances
as any objection from them will have a heavy bearing on the
important: What ever you do do not go ahead and build an
extension without written approval from your local authority.