Rear Extensions

02071 014730

02071 014730

Permitted Development Rear Extensions

Whether you are looking to achieve open plan living, looking to enlarge your kitchen, or simply looking to create more space, our permitted development specialists can make your goals a reality.

​Permitted Development Class A allows home owners to extend the rear of their property, and in most instances, achieve exactly what they are looking for from their project without the need for planning permission. The size of extension is set by the Government through their Permitted Development Technical Guidance.

 

We specialise in optimising the permitted development rear extension regulations in order to deliver your perfect project. And, if we do discover that your desired rear extension will exceed the permitted development regulations, you're in safe hands, as we have unparalleled planning knowledge in small extensions too. 

If you have any more questions surrounding your rear extension, you can also visit our page dedicated to everything you need to know about permitted development. 

Our Simple Fixed Fee covers everything you require in your project 
 

We have a straight-forward, hassle-free architectural process that guarantees the of your permitted development rear extension. 

Stage 1 - Measured survey & existing architectural plans drawn up. 

Stage 2 - Personal designer to draw your ideas to life. 

Stage 3 - Unlimited design revisions to perfect your rear extension. Utilising our expert planning knowledge, we will complete your application and work with your local planning authority to achieve planning. 

Permitted Development is here for all your rear extension needs!


 

With years of experience in permitted development rear extensions, we're more than equipped to handle any project. The kind of certificate you will need to obtain will depend on the size size of your rear extension. So, what size of extension are you looking for? 

Lawful development certificates allow permitted development rear extensions on a terraced house, or a semi-detached house up to 3 metres from the original rear elevation. For detached houses and bungalows you can extend up to 4 metres from the original rear elevation. For all property types, you can extend the full width of the original property.

Lawful Development Certificates:

Larger Home Extension Scheme (Prior Approval):

Permitted Development completed under The Larger Home Extension Scheme provides much greater depth of extension. For terraced and semi-detached houses you can extend up to 6 metres from the original rear elevation, and for detached houses and bungalows you can extend up to 8 metres. 

Permitted Development Rear Extension Rules:

Class A: Rear Extensions are not permitted if:

  • As a result of the works, the total area of ground covered by buildings within the curtilage of the dwellinghouse (other than the original dwellinghouse) would exceed 50% of the total area of the curtilage (excluding the ground area of the original dwellinghouse).

  • The height of the part of the dwellinghouse enlarged, improved or altered would exceed the height of the highest part of the roof of the existing dwellinghouse.

  • The height of the eaves of the part of the dwellinghouse enlarged, improved or altered would exceed the height of the eaves of the existing dwellinghouse.

  • The enlarged part of the dwellinghouse would extend beyond a wall which;                                     (i)forms the principal elevation of the original dwellinghouse; or                                                                   (ii)fronts a highway and forms a side elevation of the original dwellinghouse.

  • Extend beyond the rear wall of the original dwellinghouse by more than 4 metres in the case of a detached dwellinghouse, or 3 metres in the case of any other dwellinghouse, or exceed 4 metres in height.

  • The enlarged part of the dwellinghouse would have more than a single storey and                            (i)extend beyond the rear wall of the original dwellinghouse by more than 3 metres, or                        (ii)be within 7 metres of any boundary of the curtilage of the dwellinghouse being enlarged which is opposite the rear wall of that dwellinghouse.

  • The enlarged part of the dwellinghouse would be within 2 metres of the boundary of the curtilage of the dwellinghouse, and the height of the eaves of the enlarged part would exceed 3 metres.

  • The construction or provision of a verandah, balcony or raised platform.

  • The installation, alteration or replacement of a microwave antenna.

  • The installation, alteration or replacement of a chimney, flue or soil and vent pipe, or

  • An alteration to any part of the roof of the dwellinghouse.

Conditions with Materials

  • The materials used in any exterior work (other than materials used in the construction of a conservatory) must be of a similar appearance to those used in the construction of the exterior of the existing dwellinghouse.

  • Any upper-floor window located in a wall or roof slope forming a side elevation of the dwellinghouse must be obscure-glazed, and non-opening unless the parts of the window which can be opened are more than 1.7 metres above the floor of the room in which the window is installed.

  • Where the enlarged part of the dwellinghouse has more than a single storey, or forms an upper storey on an existing enlargement of the original dwellinghouse, the roof pitch of the enlarged part must, so far as practicable, be the same as the roof pitch of the original dwellinghouse.

Permitted Development Government Guidance

Whilst we know the permitted development rear extension rules inside-out, it might be helpful to familiarise yourself with it too.