Converting existing outbuildings into residential space used to be the preserve of those whose elderly parents had grown too frail or dependent to live alone – hence the term ‘Granny annex’.

Now, however, annexes are coming in useful for a wide variety of purposes. So popular are they, councils received approximately 9,000 planning applications for them in 2019/20*. Viewed in the context of the past 18 months, it becomes obvious why extra space has become quite attractive.

Confined to our homes and trying to work at the dining room table or on the sofa, the thought of a home office or gym was one many found appealing. And there’s another reason to add an annex to your own home – research found that it can add an average of £91,000 to the value of a property!

Where to start?

Firstly, what is your annex for? A home office is relatively simple, requiring a single room and perhaps toilet facilities. On the other hand, hosting Airbnb guests will probably require several rooms, including a full bathroom, kitchen facilities, living space and a bedroom.

It’s all in the planning

Next, it’s time to think about planning permission. If you’re converting an existing outbuilding, like a garage or shed, you might not even need it. You’ll likely need to submit a planning application for larger projects, though.

Gaining planning consent before you sell your property, even if you don’t build, can still raise your property’s value, as it is an indication to prospective buyers that they will be able to build their own annex should they wish.

Get in touch

If you’re looking to borrow money on your mortgage for an outbuilding, or you want to discuss anything mortgage related, please talk to our IFA for mortgage advice. We see clients across Sussex and Kent, including Eastbourne, Uckfield, Lewes, Brighton, Tunbridge Wells, Ashford, Hastings, Hailsham, Bexhill, Newhaven, Seaford, Crowborough and further afield. Please contact us to arrange a free initial mortgage review.

Clifford Osborne are Independent Financial Advisors (IFA) based in Eastbourne, East Sussex, offering mortgage adviceearly retirement advicepension advice and more. We’d be delighted to help you.

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*Churchill Home Insurance, 2021