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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to feel uncomfortable about my in laws offering a huge house deposit?

356 replies

ThatZippyWasp · 15/03/2026 13:55

Husband 39 and I 39 are we are expecting our third baby later this summer. Our eldest is 3 and our second has just turned 1 so it is going to be busy but we are really excited to meet our baby.

We have recently announced to our families about the pregnancy and everyone seems happy for us. However my in laws have immediately started again about our housing situation.

For context, we bought a house 9 years ago. It was a 3 bed in SW London. We sold it in 2022 when we decided we wanted to start a family and change our priorities a bit. Since then we have been renting. I know renting is not ideal or particularly secure but it has worked for us for the time being while we figured out what we wanted long term.

We do have savings and we already have around a 30 percent deposit for an average 5 bed in SW or SE London. We have been actively looking and keeping an eye on the market. We would ideally like to stay in SW London but we have also seen some lovely houses in Dulwich so we are open to SE London as well.

The difficulty is that we are going to be a family of five so realistically we need a 5 or possibly even 6 bedroom house. As you can imagine those are not cheap in London. We have also considered moving further out into Surrey but we both work in London and need to be in the office twice a week so we cannot go too far out.

My in laws keep saying we need more stability for the children and they have now offered to help financially. Their suggestion is that they would contribute a large amount towards the deposit, roughly 50 percent. Between that and our savings we would obviously be able to buy somewhere much sooner and with far less pressure.

On paper it sounds incredibly generous and I do realise many people would jump at the offer. But I cannot help feeling uncomfortable about it. I worry that we would end up feeling like we owe them something or that it might blur boundaries later on or if there’s a breakdown of our marriage. We’ve been together since we were 19 at university.

My husband thinks I am massively overthinking and says they are just trying to help us and want their grandchildren to have a secure home. He says we would be silly to turn it down given how expensive London is. I think we are capable of buying our own place ourselves we’ve saved up enough for 30% deposit could probably add another 5% each to that. I don’t want his parents to later on say to us you have the house because of us or you have this because of us etc. They’re lovely in laws and I’m grateful but I also think boundaries are important once we start blurring it would mean they would get a say in a lot of aspects of my children’s lives which isn’t what I’m comfortable with.

DH and I have spoke and he’s said it’s my call he understands where I’m coming from. I feel bad saying no as it is a privilege but I just don’t want to feel as though I owe them something in return. Maybe I’m over thinking it and I’ve watched too many exaggerated tv dramas.

OP posts:
ThatZippyWasp · 20/03/2026 12:29

Didimum · 20/03/2026 11:53

The average deposit being 10% and OP's being 30% has nothing to do with affordability. Even at 30% deposit, they are looking at a mortgage amount of in excess of £1m. Taking on a mortgage of £1m at 40yrs old is a stretch for anyone. That's committing to repayment of between £5-7k per month, every month, until 60s. That's not typically very sustainable from earnings alone.

You’re right but no one takes on a mortgage like that without thinking about it, or having financial advice, we do have a financial advisor.

We have 2 properties in west London mortgage free, a 3bed and a 4 bed. we rent them out. We have significant equity from the 2 properties

I am not going to go into ALL our finances but we’ve thought about this. 30% deposit isn’t all we’ve got and 2 other properties isn’t all either.

OP posts:
Didimum · 20/03/2026 13:20

ThatZippyWasp · 20/03/2026 12:29

You’re right but no one takes on a mortgage like that without thinking about it, or having financial advice, we do have a financial advisor.

We have 2 properties in west London mortgage free, a 3bed and a 4 bed. we rent them out. We have significant equity from the 2 properties

I am not going to go into ALL our finances but we’ve thought about this. 30% deposit isn’t all we’ve got and 2 other properties isn’t all either.

Better to sell one of those properties and take out a smaller mortgage. You'll be blowing £500-700k on interest alone.

Depends on the rental yield vs mortgage rate, and the tax you're paying on it, but at 40, this is the more balanced sweet spot.

Yardbrushes · 20/03/2026 13:38

Good call.
They sound like ugly people at their core.
The type that would swan in and make comments referencing their contribution and telling others two.
It's all rather tacky.
I wouldn't have time for people who would treat some of their children like that.
Awful behaviour.
They clearly think it benefits THEM to be a part of YOUR financial success.
Vulgar.

ThatZippyWasp · 20/03/2026 16:36

Didimum · 20/03/2026 13:20

Better to sell one of those properties and take out a smaller mortgage. You'll be blowing £500-700k on interest alone.

Depends on the rental yield vs mortgage rate, and the tax you're paying on it, but at 40, this is the more balanced sweet spot.

I don’t want to go on about every detail of my finances but we don’t need to sell at all. We are okay thank you for the advice but I think you’re making a lot of assumptions on our personal finances not sure why you feel the need to do that but thank you it’s gone far enough now.

My thread was in regards to parents in law and the dynamics they have with their siblings vs DH.

OP posts:
Dashling · 20/03/2026 18:09

Yardbrushes · 20/03/2026 13:38

Good call.
They sound like ugly people at their core.
The type that would swan in and make comments referencing their contribution and telling others two.
It's all rather tacky.
I wouldn't have time for people who would treat some of their children like that.
Awful behaviour.
They clearly think it benefits THEM to be a part of YOUR financial success.
Vulgar.

I like how involved you’ve got with a scenario that hasn’t actually happened.

ThatZippyWasp · 20/03/2026 18:43

Dashling · 20/03/2026 18:09

I like how involved you’ve got with a scenario that hasn’t actually happened.

My PILs have previously made comments so they are correct in their assumption. The scenario described has actually happened.

OP posts:
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