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Elderly parents

Granny Annexe in garden - things to consider?

79 replies

stormsurfer · 24/03/2026 15:21

Looking for advice please about the things I need to consider when putting a granny annexe into my garden for my parents to live in. I’m concerned I may miss some essentials in the building, the services to it and also in establishing boundaries between us.

Has anyone got any tips or suggestions? Any problems that you encountered that I should avoid?

OP posts:
EmotionalBlackmail · 24/03/2026 15:52

Don’t do it! I grew up as a child with grandparent living in an annexe and it was disastrous for everyone. It isn’t something I’d do to my own children.

You end up unable to do anything else so it wrecks family life as the elderly person takes over days out, family activities and holidays. Everything is geared to their needs and those needs increase all the time. Who will take them shopping, cook
the meals, do the laundry, take them to appointments? Do the personal care when it gets to that point?

Can cause a horrible financial mess too depending on who owns the land it’s built on and who paid to build it. What happens if they need to move into a care home but their money is tied up in the annexe? What happens if you or your partner lose your job and need to downsize?

twilightcafe · 24/03/2026 15:53

You'll be at their beck and call. There is no real way to enforce boundaries, especially as they get older and require more support.

HoraceGoesBonkers · 24/03/2026 16:04

You'll need to make sure it's all either adapted for reduced or no mobility, or adaptable - so wide doors, space in toilets for walk in showers, all that sort of thing. Specialist advice would help.

But as PP have said, it's likely to all end in tears. Running small errands can escalate into doing a lot of life management, personal care, night waking, dealing with medical issues. And they're unlikely to want carers or to move into residential care when you're just across the garden.

Bluesclues1 · 24/03/2026 16:10

Another one here to say don’t do it. I watched my parents almost divorce because of it as a teenager when my grandparents moved into an annex in our garden. It caused so many issues despite them living in a separate building. They were more high maintenance than the 4 teenagers living in the house..

Miranda65 · 24/03/2026 16:11

I can't advise on the practical issues (tho obviously you'll need planning permission). But do you really want to potentially be a carer? Twice over? It will take over your life, possibly for many years. And the reality is actually that proper residential care would be so much more beneficial. If you have money to spend now, why not use it to buy in services that your parents may need where they currently live?

Meridas · 24/03/2026 16:13

Take financial and legal advice regarding ownership and who pays for what in the build - important for future planning re potential financing of a care home place and/or inheritance if you have siblings.

ginasevern · 24/03/2026 16:23

So much to consider OP. Your lives will never be private again for a start. Also legal ownership of the land/building, inheritance, siblings. What if one of your parents becomes widowed and remarries - what happens then? I know it sounds fanciful, but stranger things have happened. Generally I've seen this sort of arrangement all end in tears usually because the grandparents really won't recognise any boundaries at all.

AlohaRose · 24/03/2026 16:26

All the things everyone else has mentioned! Who is paying for construction of the annexe? Do you have siblings and what happens when your parents pass away and you end up with a substantially more valuable property and there is nothing left for your siblings to inherit?

ChubbyPuffling · 24/03/2026 16:26

I've seen this issue come up on mumsnet before... an awful thought, but consider what happens if you die first.

GreenCaterpillarOnALeaf · 24/03/2026 16:27

I’m sure it doesn’t always end in tears but I’ve never seen it end well. My aunty did this for my dad’s parents. He refused to do it, which caused animosity, but he was so glad he did. She basically was at their call 24 hours a day 7 days a week. She was also extremely enraged when the inheritance was split evenly. Caused a lot of resentment in the family that really has never been properly addressed at it’s a real shame because out of all my aunts and uncles my dad and his sister were the two who were closest.

catipuss · 24/03/2026 16:29

Heating and insulation, older people get cold and potential mobility issues.

YYURYYUCICYYUR4ME · 24/03/2026 16:33

It worked for us, but we owned the annex, it shared utilities so counted as a granny annex and no money was put into the property by parent, only a tiny contribution per month for utilities. He had a partner he met after moving into the annex, but we made it clear from the beginning of his living in the annex there'd only be him living there and he would have to move out to live with anyone else (he chose not to, his choice) and any care would be based on him having external assistance, based on his income. It is important to clarify rules, finances, boundaries, and if it is totally separate the annex will be subject to its own council tax. I appreciate it might not work for all, but the relationship with my Dad was excellent, open and honest, so worked for us.

BeeCucumber · 24/03/2026 16:35

Do you have a partner, job or social life? If yes, be prepared to lose them when you do this.

MrsKateColumbo · 24/03/2026 16:36

It can work. G-Grandad lived in my G-uncle's garden next door to GD. He did come inside for meals mostly but luckily never had any major care needs. Im not sure how the ££ worked out - think it was all owned by G-uncle

SockFluffInTheBath · 24/03/2026 16:39

Good grief, no, don’t do it unless you are utterly devoted to them. FIL lives next door and honestly I would give an arm for him or us to be somewhere else.

You will get no respite, you will have to battle harder than normal to get SS to support, all medical staff will believe they have 24/7 care from you and need no-one else, and you will simultaneously feel like you can never do enough despite giving every second. They can see when you are ‘free’ eg not at work, and will always ‘just need you to pop over’, you will always be the default because all family- despite promises- know that if they slack off you’re there to pick it up. Oh and when you’re ill or have an appointment of your own everyone else would love to help but can’t because the neighbour’s cat’s getting married…

Just don’t, it’s craziness.

DeftGoldHedgehog · 24/03/2026 16:40

EmotionalBlackmail · 24/03/2026 15:52

Don’t do it! I grew up as a child with grandparent living in an annexe and it was disastrous for everyone. It isn’t something I’d do to my own children.

You end up unable to do anything else so it wrecks family life as the elderly person takes over days out, family activities and holidays. Everything is geared to their needs and those needs increase all the time. Who will take them shopping, cook
the meals, do the laundry, take them to appointments? Do the personal care when it gets to that point?

Can cause a horrible financial mess too depending on who owns the land it’s built on and who paid to build it. What happens if they need to move into a care home but their money is tied up in the annexe? What happens if you or your partner lose your job and need to downsize?

Um, you have all that anyway if your parents need it, but you are just driving to their house to do it instead.

I had both my parents living with us at one point and we helped one another out at different times. We always had at least one grandparent with us when I was growing up. Well rubbed along pretty well and no-one needed paid care.

If you have elderly parents that need a lot of care, however you manage it, it's a difficult phase of life.

EmotionalBlackmail · 24/03/2026 16:46

DeftGoldHedgehog · 24/03/2026 16:40

Um, you have all that anyway if your parents need it, but you are just driving to their house to do it instead.

I had both my parents living with us at one point and we helped one another out at different times. We always had at least one grandparent with us when I was growing up. Well rubbed along pretty well and no-one needed paid care.

If you have elderly parents that need a lot of care, however you manage it, it's a difficult phase of life.

Edited

No you don’t, not unless you choose to do it. I’m at a distance and have a FT job and children at primary school so I can’t do shopping, laundry, cooking, care or taking to medical appointments. If my elderly parent lived in my garden I’d end up getting sucked into all of that.

ArtAngel · 24/03/2026 16:47

Plan for the worst of every scenario.

This is what happened to my friend.

Her Mum put all her money from the sale of her small Northern home into my friends house, contributing to the overall refurb and building a beautiful studio flat as an extension. All went v well - the Mum made her own local friends and activities, kept herself to herself except when invited, but was also a helpful source of childcare for the two rising-teen Dds.

Then my friend died in sudden and tragic circumstances. So her widowed DH was living with his MIL. Good to begin with , they were close, got on, she was a huge support with the Dd.

5 years on, he is seeing someone, wants to move, can't buy her out at a level that enables her to buy her own place, she cannot move back North - too old now, all friends from there gone. It's a big unhappy mess.

What if something happens to one of you? What if you want to or need to move for work? What if you divorce? It's all very well saying these things won't happen, but what if they DO? What would the plan be?

pinkdelight · 24/03/2026 16:47

DeftGoldHedgehog · 24/03/2026 16:40

Um, you have all that anyway if your parents need it, but you are just driving to their house to do it instead.

I had both my parents living with us at one point and we helped one another out at different times. We always had at least one grandparent with us when I was growing up. Well rubbed along pretty well and no-one needed paid care.

If you have elderly parents that need a lot of care, however you manage it, it's a difficult phase of life.

Edited

It's nice that it worked for you but many other families prefer to use paid care, which is much easier to implement if they're not living in your home/back garden where there's some distance and boundaries already established. So it's not a simple toss up between granny annexe or driving to them to do everything at all. Many DC don't even live within driving distance anyway.

DeftGoldHedgehog · 24/03/2026 17:11

pinkdelight · 24/03/2026 16:47

It's nice that it worked for you but many other families prefer to use paid care, which is much easier to implement if they're not living in your home/back garden where there's some distance and boundaries already established. So it's not a simple toss up between granny annexe or driving to them to do everything at all. Many DC don't even live within driving distance anyway.

No-one had dementia so wouldn't have needed paid care.

thedevilinablackdress · 24/03/2026 17:14

See a lawyer to cover eventualities such as PP mention of you pre-deceasing. Or if you're married, what happens if you divorce and need to split assets.

thedevilinablackdress · 24/03/2026 17:14

DeftGoldHedgehog · 24/03/2026 17:11

No-one had dementia so wouldn't have needed paid care.

People need care for things other than dementia.

Goodluckanddontfitup · 24/03/2026 17:16

I find the majority of responses on here very sad. I think it’s wonderful that you are considering doing this for your parents, and I would hope that in a similar situation if I am able to, I would do the same. I wouldn’t forgive myself if I didn’t help if I could. If you have a good relationship with your parents there is every reason this can work, and I commend you.

thedevilinablackdress · 24/03/2026 17:20

Goodluckanddontfitup · 24/03/2026 17:16

I find the majority of responses on here very sad. I think it’s wonderful that you are considering doing this for your parents, and I would hope that in a similar situation if I am able to, I would do the same. I wouldn’t forgive myself if I didn’t help if I could. If you have a good relationship with your parents there is every reason this can work, and I commend you.

They might be on the negative side, but they'll help OP go in with their eyes open.
I've seen it in my family and while it wasn't by any means a total disaster, it did put a lot of strain on sibling, marital, and the parent -child relationships.

carkerpartridge · 24/03/2026 17:27

Having lived with my DM, I would agree with all the considerations and negatives already brought up! It would depend on the layout and space that you have available but I think you would probably lose any sense of privacy in your outside space as well as in your home. If you have bored/ anxious/nosey parents they will be monitoring all your comings and goings and will see you as being available just because they know that you are at home. It is extremely difficult to establish boundaries when you are always next door! It can also put pressure on your relationship with partner/children/friends if your parents are likely to gatecrash your time with them.

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