Architectural Designer for Loft Conversion
By Kem Maraz
Loft Conversion Costs in London
Loft conversions have become increasingly popular in London as a way to add extra living space and increase the value of a property. However, the cost of a loft conversion can vary depending on a number of factors, including the size of the property, the type of conversion, and the level of finish required. In this post, we will explore the current loft conversion costs for a three-bedroom house in London.

The cost of a loft conversion in London can range from around £20,000 to £70,000 or more…
The cost of a loft conversion in London can range from around £20,000 to £70,000 or more, depending on the type of conversion and the level of finish required. A basic loft conversion, such as a simple roof light conversion, can cost around £20,000 to £30,000. This type of conversion involves installing windows in the roof to allow natural light into the space, and may require minimal structural work.
A dormer loft conversion, which involves adding a dormer window to the roof to increase headroom and usable floor space, is a popular choice for many homeowners. This type of conversion typically costs between £30,000 and £50,000, depending on the size and complexity of the dormer.
A hip to gable loft conversion involves extending the roof to create more space, and can cost between £40,000 and £60,000. This type of conversion is often chosen when a property has a hip roof, which slopes down on all sides, as it allows for more headroom and a larger usable space.
Finally, a mansard loft conversion involves building up the walls and roof of the property to create a more substantial living space. This type of conversion is the most complex and expensive, and can cost between £50,000 and £70,000 or more.

The cost will depend on a number of factors…
It’s important to note that these costs are just a rough guide, and the actual cost of a loft conversion for a three-bed house in London will depend on a number of factors, including the size and complexity of the conversion, the level of finish required, and the location of the property.
When considering the cost of a loft conversion, it’s important to take into account the potential increase in the value of the property. In many cases, the added living space and improved functionality of a loft conversion can increase the value of a property by as much as 20% or more.
Overall, a loft conversion can be a great way to add extra living space to a three-bed house in London, and can be a sound investment for homeowners looking to increase the value of their property. However, it’s important to do your research and get several quotes from reputable builders to ensure you get the best value for your money.
Planning Design London offers expert advice and support on your loft conversion project. We have years of experience on designing home extensions in Bexley, Bromley, Croydon, Greenwich, Lewisham, Lambeth, Southwark, Dartford, Gravesham, Maidstone, Medway, Sevenoaks, Tunbridge, Malling.
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