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Home Extensions


Extending your home is a popular way to increase space and add value to your property.


With the hassle and costs of moving house – from legal fees to stamp duty – the reasons to stay put and improve your existing home soon mount up. But where do you start?


Whether you’re thinking of a garage extension, side extension, double or single storey rear extension, there is much to consider as you embark on an improvement project to expand your home.


▶︎ What to consider from the outset


▸ Will your plans add value?


As with any big home improvement project, it’s worth sense-checking your plans before you dive in. Unless money is no object, it’s worth speaking to a local estate agent who can give a view on whether your plan would add value to your home.


They should also be able to give you an indication of how much it would increase the value by, which may help inform your budgeting for the project.


Extensions must be built with similar materials to the existing property. Find out whether or not plans fall under the permitted development guidelines.


Different planning rules may also apply if your home is in a Conservation Area, and for any renovations to a Listed Property you will need to obtain listed building consent. ​


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▶︎ Permitted Development and Planning Permission


You can undertake some extension projects without the need for planning permission, referred to as your “permitted development rights”.


Under the rules, a rear wall of a detached home can be extended by 8m to the rear if it is a single storey property, and 3m if it is double storey. This is reduced to 6m in a semi or terraced house.


There are also height restrictions: a single storey extension not being higher than 4m in height to the ridge and the eaves, and ridge heights of any extension not being higher than the existing property. And double storey extensions mustn’t be closer than 7m to the rear boundary.


There are other conditions that must be met. For example, if the extension is more than half the area of land around the original house, you will need planning permission. ​



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