How much does it cost to build an extension / conversion?

A standard loft conversion is a brilliant way to add functional space to your home, and is ideal for a bedroom, office space or a reading room. The cost of dormer extensions may vary based on your requirenments, but it will generally cost between 45-49K based on factors such as the size of your property, roof height or elements such as types of stairs you wish to include.

Apart from a standard loft conversion, you also have the option of opting for other types of loft conversions to suit your needs.

A double mansard loft conversion which adds more space to both the front and rear end of your property will cost around 48-53K.

We also design and build L shaped extensions that can even be converted into another master bedroom. The price will depend on whether you prefer the extension with a half back addition or a full back addition which ranges from 55-60K and 60-65K respectively.

Alternatively, you can also opt for other designs such as Hip to gable loft conversions, Veluxe loft conversions and more. You also have the choice of customising the designs such as adding a roof light to your loft conversion, where the costs may vary depending on the style, features and design scheme.

You can also add a side return extension or rear extension to your home that will both expand your living space as well as add value to your home and property.

The cost of a rear extension which you may open out into the backyard or use as a spare room will range from 52-55K while a Side infil extension and Side return extension may cost around 60-65K and 70-75K respectively. The cost of small rear extensions may be lower than more complicated designs, depending on your preference.

Our team of experts are also well experienced in creating functional and also luxurious kitchens that are perfect to accommodate your entire family, entertain friends or for family dinners. The cost of a kitchen extension may depend on the size, style and extent of remodelling that you may wish to carry out. Roughly a 4m Kitchen extension may cost around 60-65K while a 6m Kitchen extension may vary from 75-80K. You also have the option of choosing a skylight kitchen extension, which adds natural light to your space and transforms your kitchen into an open, airy space.

A living room extension cost typically depends on the scale and design. Extending your living room is a great way to create an open, comfortable area for family gatherings and entertainment.

To estimate building costs for an extension, you need to consider several key factors including size of the extension, design complexity and the type of extension—whether it’s a single-story, double-story, loft conversion, or kitchen extension—that will affect the overall cost. Materials and finishes also need to be considered when determining the cost.