Loft conversions are a great way to add more space and value to your home. They’re relatively straightforward, cheap enough for homeowners on a budget while still being a valid alternative to moving altogether.

This guide will help you plan the costs of a loft conversion possible so that it is successful and looks good from start to finish. If you want to give your home a new room or add value with a loft conversion, it may be the perfect time for some renovations. We’ll go through the different elements that impact the costs of loft conversions so you know the average prices and what to expect.

How Much Does a Loft Conversion Usually Cost?

The costs of a loft conversion vary based on the construction needed, where you live in the country and the size of the area that needs to be converted among other elements. As a general rule of thumb, loft conversions can cost between £30,000 and £50,000 but, of course, this is only a rough estimate.

Last but not least, the design is also to be considered. The more sophisticated, the higher the costs. 

These are the 17 best ways to design your loft in 2021.

loft conversion

Types of Loft Conversion

Here below you will find all the types of loft conversions to give you a better idea about the cost, the material and process involved, and more.


Price of a Loft Conversion for a Semi-detached Property

Converting a loft into a semi-detached house is a great idea for several reasons. That said, the costs depend on the type of roof chosen. For example, you can install windows without making structural changes to the roof. On the other hand, it would be more expensive if you want to build an en suite and bedroom in addition by turning part of your roof into a vertical gable end. The average price of a loft conversion in a semi-detached house is £38,000.


Costs of a Dormer Loft

A dormer loft is a perfect idea in case you want to add headspace as part of your conversion. In fact, dormer lofts allow you to get more space by creating window structures that come out of the existing roof instead of just adding an extra floor or building up extra space. The average cost to build a dormer loft is £45,000 and that includes demolition and construction costs as well as planning fees.


Costs of a Hip to Gable Loft Conversion

Converting a Hip-to-gable loft allows you to gain more space to the top of a semi or detached property with a sloping roof. Hip to gable lofts is only suitable for buildings that are not too close together since it adds space on both sides of your roof. The average cost for a hip-to-gable loft conversion is around £55,000 but can vary significantly depending on your location in England and Scotland.


Price of a Bungalow Loft Conversion

Bungalows are perfect for a loft conversion because they generally are single-storey properties and allow for an additional bedroom, extra living space, or a bathroom. However, this extra space and an extra layer of convenience come with a price. On average, a bungalow loft conversion will set you back £75,000. 


Costs of a Velux Loft Conversion

If you need to get additional space without investing too much, or at least less than other loft conversion types, a Velux loft conversion is the way to go. The only downside? You don’t get as much extra square footage and the additional space will be minimum. A typical cost of this type of conversion is £27,500 on average in London or around half that price for other UK regions (£20k).


Costs of a Terraced House Loft Conversion

A terraced house loft conversion can be done in two ways, a simple Velux or fully open to the roof. The easiest and most convenient option is your standard Velux conversion in terraced houses which costs around £27,000 for labour and materials while an entirely new build will cost upwards of £50,000 due to added material fees like electrical wiring.


If you’re willing to have additional usable space and get your loft to potentially be used for one or two rooms, the cost will be higher. In this case, a mansard is your best bet in terms of additional space but the costs will be around £57,000.


Costs of a DIY Loft Conversion

If you are on a budget, consider building part or even the whole loft conversion. For instance, you could hire a company such as Glasgow Tradespeople to take care of the basics. The stairs, flooring, or wall structures are the most complicated parts to take care of.


All things considered, when converting a loft by yourself, the usual cost is around £30,000. Needless to say, the bigger it is, the more help you’ll ask professionals, the more premium the materials, and the more you’ll end up paying.


loft conversion

Will Loft Conversions Add Value to Your Property?

Loft conversions are one of the best investments you can make to your property. However, it is important to do some research on the Return On Investment compared to the overall cost you’re paying. This is simply because the conversion could potentially be worth a lot more than what you pay for them if done correctly. Usually, in the UK, the average added value when extending your property with a loft conversion is 20%.

loft conversion

How Much of a Value do Loft Conversions Add to Your Home?

In terms of renovations, a loft conversion is one of the most efficient ways to increase your property value. In fact, a loft conversion could increase your home’s value by up to £60,000. As we’ve seen in this guide, conversions cost on average £30,000 and £40,000.


We’ll provide deeper information here below so you know what to expect:


  • £1,150 to £1,350 per square metre on a basic mansard loft conversion
  • £1,250 to 4,500 per square metre for dormer conversions
  • £1,350 to £4,000 and more for the most complex conversions