Buying A 3-Bed London Home With A ‘Granny Flat’

Granny annexes/ flats are incredibly popular with families who would like to look after their parent(s) as they get older…

3-Bed properties that have them also tend to carry a premium…

If you are planning on building a detached granny flat in the garden of your next 3-bed home, this requires planning permission.

This is also usually the case if you are looking to convert a detached garage into a granny flat.

Interestingly, if you build a detached granny annexe you don’t have to pay stamp duty on it, as long as it is used by a family member...

If you are looking to build an extension for the granny flat, then your local planning regulations will still apply…

If, on the other hand, you are simply planning on altering the inside of your 3-bed house in terms of use of rooms (without making structural changes) and as long as your property is freehold, then this is allowed.


“If you are planning on building a detached granny flat in the garden of your next home, this requires planning permission.”


A number of 3-bed homes are what is referred to as ‘multigenerational’, meaning that adults live under the same roof as their grown up children.

There are a growing number of 3-bed properties and homes that have a granny flat in London and many home owners in London and further afield that would love to build one for their parents and family members.

After university, it is common for children to move back in with their parents (if their future job prospects are near to home!) and if there is no need for a grandparent to live in the ‘granny flat’, it can be used as a home for the post-university adult, giving them the independence that they have been used to at university.

It is also possible to buy a 3-bed property in London, for example, with a self-contained lower-ground floor flat.

This can be a superb way of having a separate dwelling/ flat within a property such as a duplex flat or a townhouse…

These 3-bed properties also make good long term investments as they tend to demand a premium price.

Have you ever thought about purchasing a 3-bed home with a ‘granny flat’ or converting part of your current home to a ‘granny flat’…?

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