9 things to think about before building a granny flat

Lisa and her mum Sheila outside their granny flat. Picture: Lisa Salmon/PA (Image: Archant)

Thanks to rising property prices and expensive care home fees, a growing number of families are opting to live with, or right next to older relatives, by building granny flats on their homes.

The latest figures from the Valuation Office Agency show there are now nearly 39,000 granny annexes in England and Wales alone - an increase of 16 per cent in recent years.

The government has tried to encourage families to live together by discounting council tax and scrapping stamp duty increases on annexes, and ministers have stressed the benefits of inter-generational families, which help save the NHS and social care system a lot of money.

But if you’ve got an elderly relative, is constructing a granny flat on your home the right option for you and them?

The government has tried to encourage families to live together by discounting council tax and scrapping stamp duty increases on annexes. Picture: Thinkstock/PA (Image: Archant)

It was certainly the right choice for our family. Around three years ago, my widowed mother Sheila, now 81, and my husband and I decided we should build a granny flat for her on the side of our house. So she sold her house about 40 miles from us, and we applied for planning permission to build a two-storey annex.

It was a huge decision for us and my mum, who was leaving the house she’d lived in for more than 50 years, as well as her friends and neighbours, to live in a new city where she only knew us.

But the alternative was that, as she got older and became less mobile, she could be lonely - and there’d be no one to help her if she fell, for example, or became ill. It was already becoming increasingly difficult for her to keep up with the cleaning and maintenance of her three-bedroom detached home too. Her moving to live, not with us, but next to us, was clearly the best option - particularly as she’d always been vehemently opposed to moving into a residential home should the need arise.

My mum’s now lived in the annex for around two years, and while the process wasn’t always easy (the build was stressful, to say the least!) and my mum understandably still misses her old life and home, we have no regrets. My mum lives completely independently in her self-contained one-bedroom flat on the side of our house, still regularly drives over to her old golf clubs 40 miles away, and is (gradually) forging a new life here.

The few times she’s been ill since she moved, I’ve gone in an ambulance with her to hospital, made meals for her and carried them in, and regularly checked on her. When she lived so far away, that would have been impossible. And, of course, she sees our family - including two young grandchildren - all the time.

There’s no doubt, building a granny flat has worked for us. But what about other families?

If you’re thinking of building a granny flat, here are nine points that might help you make up your mind…

1. Bridge before care

While it may not be possible for an elderly person to avoid going into a care home eventually, a granny annex can offer a useful bridge between independence and the provision of care.

2. No council tax

The National Federation of Builders (NFB) says an annex occupied by an elderly or disabled family member has a 100 per cent council tax discount.

3. Shared bills

Depending on how it’s built and your preferences, bills may be shared between the family home and the granny flat, potentially saving money (assuming granny or grand-dad doesn’t have the heating on all the time).

4. Do it sooner not later

Moving can be very stressful for anyone, but especially for an older person. A decision to build a granny flat needs to be made sooner rather than later - ie. before an elderly relative is in desperate need of an accommodation change, and while they’re still reasonably mobile if possible. Look on it as an investment for the future.

5. Choose builders carefully

A new build can also be very stressful, so choose your builders carefully. The NFB’s Find a Builder (builders.org.uk/find-a-builder) helps people contact reputable builders who’ve been strictly vetted and have undergone a range of reference checks.

6. Plan for future needs

Think carefully not just about the elderly person’s needs now, but what they may be in the future. If your granny annex is two storeys, do the bedroom and toilet need to be downstairs in case mobility becomes an issue in later years?

7. Communication is key

Honest and detailed discussions are crucial, both with the builder before construction about the budget, timescale and exactly what you and the elderly relative want, and with your relative about how bills will be paid (if they’re shared), who’s responsible for the garden if it’s shared, whether you eat together, whether you knock before entering each other’s homes, etc.

8. Get legal advice

It’s important to discuss, and get legal advice if necessary, what happens if either the younger family or the older relative wants to sell up and move to a different property but the others don’t want to sell.

9. Be prepared for relationship breakdowns

It may also be worth seeing a solicitor to discuss what happens if there’s a relationship breakdown, as one of the family homeowners may demand their share of the property in divorce proceedings. What happens to the granny flat occupant then?