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Thinking about extending...

A regular column by Keith Mansell of Manse Designs

Class A - Enlargement – Rear Extensions

CLASS A rights deal
with both side and rear
extensions, but for For a two storey
this article I will just rear extension
be dealing with your you can only go
Permitted Development up to a maximum
rights for a rear of 3 metres from
extension. the rear elevation.
The extension
For a single storey you can must also be over
go out up to 4 metres from 7 metres from the
the rear wall of a detached rear boundary but
house and up to 3 metres remember that
for a terrace/semi-detached a flat roof eaves will be higher the maximum
property. however, the total than a pitched roof eaves. eaves is 3m within 2 metres of
area of the extension must not any boundary. This has been
cover more than 50 per cent The other condition which done to prevent two-storey
of your garden. could impact if your extension extensions close to your
requires planning permission
The width of the extension neighbour’s boundary.
can go the full length if you is if you already have an For the next article I will
extension on your home. If so
like. With regards to the then that must also comply discuss your PD rights for
height of a single storey with Permitted Development side extensions under Class
extension, it is a maximum rights, even if it has already A. If you have any questions
height is 4 metres and must had planning permission then please feel free to get in
not be higher than the ridge- before. touch.
line of the main house.
If the extension is within
2 metres of a boundary then
the eaves height can only
be a maximum of 3 metres
measured from ground level.
The eaves must also be
no higher than the eaves on
the original house. This is an
important requirement to
note because this is the reason
why a flat roof extension on
a bungalow would not fall
within PD rights. As described
within the Technical Guidance

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