Do I Need Planning Permission for a Rear Extension?
This means that you can extend up to 8m from the original rear wall of your property on a detached home, or up to 6m on a semi detached or terraced home. In either case, your extension must not be higher than 4m. There are further restrictions if your project is to sit within 2m of a boundary (in this case the eaves must not be higher than 3m).
These measurements apply to single-storey extensions only, but some two-storey additions are allowed too.
Choosing a Design Style
If you are carrying out your work under Permitted Development, you will be expected to build in the same material as the existing dwelling. This must be done carefully, perhaps requiring you to source reclaimed materials to get a good match, or tint the bricks for a seamless look.
Alternatively, you could design an addition in a contrasting style. This makes a statement and can be easier to achieve success with than trying to match old and new.
Here, we take a look at some of the finest examples of rear extensions in recent times.
This grey rendered blockwork ground floor extension supports a timber frame bedroom ‘box’ above.
A contemporary-style addition clad in western red cedar contrasts with this original Grade II-listed cottage.
A new glazed space to a traditional whitehouse croft, provides a kitchen and utility room filled with natural light.
A cantilevered timber-clad roof appears to float on clerestory windows set above a white rendered wall on one side, and sliding doors on the other.
The sympathetic oak frame addition, with reclaimed triple Roman clay tile roof, offers a family sunroom.
Two new structures, clad in timber and Cor-ten steel, are linked to this old farm building with a glazed corridor.
This large rear addition incorporates a spacious kitchen diner and separate open plan living room, which open on to a patio.
This single-storey kitchen extension opens onto the garden with powder-coated bifold doors from Origin.
This rear single-storey addition to a London flat in a conservation area has been clad in a pre-coloured dark zinc.
Using contemporary frameless glass, a new bright open plan kitchen/dining/living space has created, which opens on to the rear garden without impacting on the traditional brick shell of the building.
This 1930s dormer bungalow has been transformed into a stunning chalet-style home thanks to a series of rear and side additions.