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Urbanist Architecture: The Experts for Planning Permission

Johannes van Graan Johannes van Graan
Greenwich Design and Extension by Urbanist Architecture Modern
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For London-based Urbanist Architecture, daily operations consist of so much more than designing blueprints for new structures. This RIBA-chartered practice is also on a mission to increase the quality of clients’ lives, which is why they are also fully committed to being one of London’s best planning permission architects and planning consultants for residential extensions, renovations, conversions, and newly built houses and flats. 

And it is exactly this technical “know-how” that sets the Urbanist Architecture team apart from competitors. 

As a matter of interest, let’s delve into the process of obtaining planning permission for a house extension in London…

1. Do you need planning permission for an extension?

In a lot of cases, adding an extension to a house can be seen as a permitted development, for which planning permission for an extension wouldn’t be required. Should this be the case, it is not necessary to gain any permission or submit documents or applications for your planned extension.

Just bear in mind that this is subject to certain limits and criteria, which is why it’s always best to have seasoned professionals (such as Urbanist Architecture) on board. 


2. The criteria to determine whether you need planning permission for an extension

L Shaped Dormer Loft Conversion by Urbanist Architecture Modern Bricks
Urbanist Architecture

L Shaped Dormer Loft Conversion

Urbanist Architecture

The following points are considered when reviewing whether you require planning permission for an extension:

• The size of your house’s extension (it can’t be more than half the area of land around the “original house”). Remember that this also includes the time since the property was originally built, which means you must also consider if the previous owners did any extension works. 

• An extension can’t be built under the permitted development rules if it’s nearer the public highway either by way of front elevation or side (once it’s completed). Should it be nearer to the public highway, planning permission for an extension is needed. 


3. The criteria (continued)

Open-plan living area Modern living room by Urbanist Architecture Modern Wood Wood effect
Urbanist Architecture

Open-plan living area

Urbanist Architecture

• The extension is not allowed to be higher than the roof’s highest part, otherwise planning permission for an extension is needed. 

• A single-storey rear extension can’t extend beyond the original house’s rear wall by more than three metres (for a semi-detached house) or four metres (for a detached home). 

• Your single storey rear extension’s maximum height should be four metres to avoid having to request planning permission for an extension. 

• No extension taller than one storey may extend beyond the rear wall of the original house by more than three metres, otherwise planning permission for an extension will be required. 

4. The criteria (continued)

Smart kitchen and dining area Minimalist dining room by Urbanist Architecture Minimalist Wood Wood effect
Urbanist Architecture

Smart kitchen and dining area

Urbanist Architecture

• Your extension’s maximum eaves and ridge height can’t be taller than the existing house.

• A side extension must be single storey, with its maximum height being four metres and width no more than half of the original house. 

• A two-storey extension can’t be closer than seven metres to the rear boundary. Any closer than that, and planning permission is required. 

• The materials used for your extension must be similar in appearance to the existing house. To use different materials, planning permission must be granted first. 


5. Rather trust the professionals to get it right

Keep in mind that this list is by no means thorough. And that planning laws often change along with building requirements. That is why it is always recommended to make use of a professional when it comes to planning permission.  

This is just one more reason to make use of the experts over at Urbanist Architecture. Because even though they have been practising UK planning law and residential architecture for more than 10 years, they are still just as passionate about creating unique designs (that are designed and constructed as per law) for clients as they were on day one. 

Thus, go with the seasoned professionals who know which route to follow for planning applications, building regulations, and tender drawings. 

From one experienced firm to another, let’s indulge in The brilliance of the Bosphorus City Villa by Sia Moore


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Whitton Drive by GK Architects Ltd Modern

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