Meet the Other Phone. Flexible and made to last.

Meet the Other Phone.
Flexible and made to last.

Buy now

Please or to access all these features

Property/DIY

Join our Property forum for renovation, DIY, and house selling advice.

Buying & Extending House with historic subsidence & underpinning

33 replies

Buddy101 · 23/03/2024 10:56

Hi - we’re quite far a long the process in buying a suitable family home for us when it comes to light that the house had subsidence and underpinning was done in 1997.

We’re struggling to get insurance as we don’t have a Certificate of Structural Adequacy as the work was done before this existed. We do however have a Certificate of Practical Completion. We have had a Homebuyers RICS survey and a drainage search and it’s not returned any issue.

We don’t know whether the difficulty in getting insurance (reasonably priced) is a red flag and whether we should walk away?

We weren’t worried before the insurance thing because we thought it has been more than 25 years and there’s no signs of issues and I guess a house that has had it done is a better proposition than one that hasn’t. But now the insurance premiums are sky high it’s causing us to stop and think. We’re going to get a structural engineer to go in and survey that it is indeed historic and nothing current.

We entered into a bidding war with 9 others and it ended up with sealed bids -none of us knew about the historic subsidence - I wonder if we had all known whether there would have been less interest/ we’ve offered to over pay quite substantially!

Finally; the house is okay size wise but our intention was to extend within 2-3 years…we’re now worried we won’t be able to afford to and that the costs will be higher because of underpinning. Has anyone got experience of this ? Will it be more difficult to extend ? More costly?

As always, any help and advice however “obvious” it might be, please share as we’re in unchartered territory here and grateful for any help!

OP posts:
2andadog · 25/03/2024 11:07

Our house had subsidence when we bought it due to a drain collapsing. Drain was repaired by the vendor, got a cert of structural adequacy and proceeded with the purchase as it was a reno project anyway and was pretty cheap. We had a full structural survey done and it was worth every penny of the £750 we paid!

We have insurance through Frontier house insurance at £500ish per year.

We've had a huge amount of building work done, and had no issues because of the subsidence. Houses move a bit anyway with the ground contracting and expanding with weather conditions and ours is over 100years old.

A huge number of new builds will have subsidence in the future years. As long as it's been dealt with and is now structurally sound, it wouldn't bother me. Half the houses in our town have visible evidence of subsidence, and they sell all day every day. If it ticks all your other boxes, and isn't over priced I'd go for it.

In regards to the agent/vendor not mentioning it, it was over 20years ago! If there has been no other issue, I wouldn't be advertising it either as people are hysterical about it without knowing the facts.

Good luck!

IamRoyFuckingKent · 25/03/2024 11:15

Don't do it. I know a woman whose house had subsidence and it's impossible for her to do anything. Can't sell it because of the issues, insurers have refused to pay up despite lengthy court case, she can't even tile her bathroom because the tiles just fall off as the house is moving. This is a fairly modern house too.
You might lose some money but not as much as if you proceed and there are subsidence issues.

2andadog · 25/03/2024 11:27

IamRoyFuckingKent · 25/03/2024 11:15

Don't do it. I know a woman whose house had subsidence and it's impossible for her to do anything. Can't sell it because of the issues, insurers have refused to pay up despite lengthy court case, she can't even tile her bathroom because the tiles just fall off as the house is moving. This is a fairly modern house too.
You might lose some money but not as much as if you proceed and there are subsidence issues.

It sounds like her house is still subsiding... very different scenario 🙂

martellotower · 25/03/2024 11:43

I think I've read that with modern houses there can be problems with a mismatch of materials between foundation and house.
Perhaps the poster with a structural engineer in the family might know more .

seven201 · 25/03/2024 12:00

We have historical subsidence on the house we bought. I think it's common round here. We just needed to use a broker for insurance, couldn't use an online comparison one that's all. Can't remember the insurance figures but it wasn't hugely more expensive. Lived here 8 years and no issues.

Luckycloverz · 25/03/2024 12:19

Is there a particular reason for the subsidence in the area? Near the coast, any recent movement? Is there any obvious cracks on the property or the neighbouring ones?

We walked away from a similar property in the past as extending and joining into old foundations quotes got very high and insurance was very difficult for all the houses in the area.

Uniquemum · 23/07/2024 10:12

Hi martellotower - just wondering if you ending up buying the house in the end. Interesting to red this thread as our house we have lived in for about 12 years had a case of subsidence and it was showing on the wide where we had extended and did some work. So our first fear was construction. It turned out to be some large TPO trees in the front. We went through monitoring and trees have been removed and we will now be monitored for another year or so and hopefully get all clear. But we need to some further building work and wondering if it will be difficult to get a builder now? Just wondering how your experiences turned out thanks

Uniquemum · 23/07/2024 10:12

martellotower · 25/03/2024 11:43

I think I've read that with modern houses there can be problems with a mismatch of materials between foundation and house.
Perhaps the poster with a structural engineer in the family might know more .

Hi martellotower - just wondering if you ending up buying the house in the end. Interesting to red this thread as our house we have lived in for about 12 years had a case of subsidence and it was showing on the wide where we had extended and did some work. So our first fear was construction. It turned out to be some large TPO trees in the front. We went through monitoring and trees have been removed and we will now be monitored for another year or so and hopefully get all clear. But we need to some further building work and wondering if it will be difficult to get a builder now? Just wondering how your experiences turned out thanks

New posts on this thread. Refresh page