With the increase in stamp duty in the autumn of 2017, improving rather than moving has become a more suitable way for homeowners to extend their properties and obtain the space they require. It is common for properties to have large ground-floor extensions, but dividing the space over two floors with a double-storey rear extension can sometimes look more aesthetically pleasing and distribute the space efficiently. If you’re curious about extending your home over two floors, read on and we will demystify the process.
There are a few restrictions that will dictate how we’d suggest tackling a double-storey rear extension. Before deciding the best path forward, you’ll need to answer a few questions…
If it is, it is likely that your property must seek Full Planning Permission for a double-storey rear extension as your extending rights are likely restricted.
Many properties in the UK are classified as ‘Listed Buildings’ as they exhibit a specific style of architecture. To safeguard these properties, they are protected by Historic England and any external and internal changes are subject to a planning application. Unsure if your property is Listed? Check the national register here. If your property is listed, we must seek Full Planning Permission.
This includes National Parks, areas of Outstanding Natural Beauty, the Norfolk or Suffolk Broads and World Heritage Sites – if it is within one of these areas, you will need Full Planning Permission.
If your property is a house – either detached, semi-detached or a terraced property – we can proceed using Permitted Development Rights, a relaxed version of planning permission. If your property is a flat, maisonette or bungalow, we will need to apply for permission under Full Planning Permission for your desired double-storey rear extension.
If you have established that your property is a house and is not limited by any of the above restrictions, congratulations, you can seek permission through Permitted Development! This is an excellent way of extending your home because as long as you submit plans that adhere to the guidelines, the application stands a very high chance of being granted permission. In short, if you’re looking to add a double storey extension on a semi detached house, you’re life might be made a lot easier, thanks to Permitted Development Rights.
The name, Permitted Development, is misleading as it implies that you can simply start building your double-storey extension. This is a huge misconception! While formal planning permission is not required, you still must submit an application that includes:
Permitted Development will allow you to extend under certain guidelines. If you want an extension that falls outside of these parameters, you will need to seek Full Planning Permission. You can extend as a double-storey rear extension using the following criteria:
*Note: This includes outbuildings, so if you have large outbuildings you may be limited to what you can achieve under Permitted Development.
Further guidance can be found in Planning Portal’s visual guide, but to understand what is feasible we would recommend getting in touch with an architecture practice to get a free feasibility study of your proposed extension. By spending a bit more time planning ahead, you can avoid mistakes later on!
If your property does not meet the guidelines outlined above, no fear, you can likely still have a double-storey rear extension, but it will be subject to different guidelines. Every local authority has a slightly different set of rules for double-storey rear extensions, so it is best that you speak with an architect who has experience with the borough or district you’re looking to extend in.
There is so much you can do with a double-storey rear extension that it is crucial you have an idea of how you would like to allocate the space before you start. Under Permitted Development, you may be able to achieve up to a 3 metre extension at both ground and first floor. This will result in quite a bit of space, so knowing where you want that additional space – whether it be another bedroom, a larger kitchen, or an ensuite on your master bedroom – is very helpful. If you’re looking for double storey extension ideas, check out Pinterest, Houzz or any of the various design magazines. Do note that your extension must be finished with similar materials to the main body of your house – if you wish to propose something different, make sure you get professional guidance!
At Urbanist Architecture, it’s our mission to help you achieve your goals and increase the quality of your life. Reach out to us today, so we can get started on your project.