Do I need planning permission for a loft conversion?

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Do you need planning permission for your loft conversion? When do you need and not need it? What is the cost of planning permission? Learn here!

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A loft conversion is an important home improvement project that enhances your indoor space and increases the value of your home. You can use the loft for a wide range of purposes. A loft with proper insulation can also save you hundreds of pounds annually. 

The question is: do you need planning permission for your loft conversion? Because most loft conversions are permitted development, you don’t need planning permission. However, it is crucial that you meet the requirements or criteria. For example, you don’t need planning permission if you have a simple design that requires a minimal conversion with roof windows, 

On the other hand, if your design does not meet the criteria, such as altering or extending the roof space, you will need planning permission. We recommend following the building regulations to ensure you avoid legal consequences. Read on! 

When Do You Not Need Planning Permission for your Loft Conversion? 


If you have a terraced house and your loft does not exceed the 40 cubic meter volume allowance of additional space, you don’t need planning permission. Likewise, if you have a detached or semi-detached home and the roof space does not exceed 50 cubic meters, again, you don’t need to apply for planning permission. 

In addition, if your design does not have extensions or dormers on the roof plane, you can start the project without planning permission. A loft conversion project that does not contain extensions higher than the roof’s highest part does not require planning permission. 

Moreover, when you plan to use the same material for construction and your loft does not impact your home’s appearance, there is no need for planning permission. A loft conversion project or design that focuses on installing obscure-glazed side windows with 1.7m opening above the floor also does not require planning permission. 

The Cost of Planning Permission 


Experts recommend applying for planning permission if your loft conversion project exceeds the limits or fails to meet the criteria. Many people ask about the cost of planning permission. Costs of planning permission vary from location to location. 

For example, the starting fee ranges between £202 and £206 in England, Scotland, and Northern Ireland. Remember, this fee is for roof alterations and extensions for a single-dwelling property. If you live in wales, you will have to pay a fee of £230 for loft extension planning permission. 

Final Words 

According to the Nationwide Building Society, a loft conversion project can increase a home value by 20%. Not only does it enables you to create extra space, but it also makes your home more energy-efficient. 

Because a loft conversion for your property is permitted development, you don’t need to apply for planning permission. However, make sure you don’t violate the criteria, requirements, or conditions. On the other hand, loft conversions are not considered permitted developed for properties on designated land. If you need help with a Loft Conversion then please get in touch below and we would be happy to help.

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