ePrivacy and GPDR Cookie Consent by Cookie Consent Could a flat wraparound extension be for you?

Could a flat wraparound extension be for you?

4 min read
Oct '25 • by Molly-Sue Moore

Quick summary

A flat wraparound extension can cost between £90,000 and £130,000, typically for a space of around 20 to 40 square metres, depending on location, materials, and contractors. It’s mainly suitable for ground floor flats with garden access and room on the sides and back, but you’ll need permission from freeholders if you don’t own the entire building.

Wraparound extensions, or L-shaped extensions, have been a popular choice for houses with the available space to move into for a long while now. This type of extension is now beginning to gain popularity in flats – particularly when it comes to city centres where extra square metres come at a premium. We explore what a flat wraparound extension is and whether it could be a good option for increasing the size of your property.

What is a wraparound extension?

Wraparound extensions combine more traditional rear extensions with side infill extensions to add on an L-shaped space to your property. It’s a great way of filling in space around the existing parameters of your property and maximising your space.

What kind of flats are suitable for a wraparound extension?

If you’re lucky enough to have a ground floor flat that has garden space you can build into, as well as dead space to the side of your property, you could be in a prime position for a flat wraparound extension. A great example of the sort of property that could be suitable for this is one that has previously been converted from a Victorian terraced house into separate flats. This is thanks to the common presence of an alleyway to the side of the home that could be built into.

That being said, a wraparound extension would be a great choice for any ground floor flat with room to the back and sides. To get an expert view of whether your flat could be a good candidate for a wraparound extension, book a free advice call for invaluable insight.

Getting more kitchen space with a flat wraparound extension

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