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House that’s been underpinned 3 times

34 replies

KenDoddsDad · 07/10/2020 08:28

We have found our dream house. We had a homebuyer’s survey carried out and the surveyor identified large diagonal cracks externally (quite narrow, but requires investigation), one of which has been mirrored internally. So as not to drip feed, here is a description of the property:

Large detached Victorian house on clay soil. Large old oaks 20m from property, yew trees 7m from property. Suspected cause of external cracking is root damage. Cost of property: £1.3m. We are hoping to live in this property for 20+ years.

Following our survey, we asked the seller for some more information. They have now supplied documentation which says the property was underpinned once in 1993, and twice in 2011. We are 6 weeks down the line and this is the first we have heard of it. We have not been told where the 2011 underpinning has been done (we have now asked for details).

The cracking on the outside indicates further underpinning may need to be carried out, but a structural engineer will confirm this within the next week. Current owner has not had the oak trees pruned in the time they have lived there, so it is believed that if a crown reduction is performed, this will help with the root damage.

Would we be mad to consider purchasing this property? Even if we manage to sort the subsidence, would we struggle to sell the property in years to come?

OP posts:
FurierTransform · 04/10/2021 11:22

An old house that has been underpinned once and fixed properly is fine IMO. But multiple bouts of underpinning spanning decades and still not fixed? I'd definitely be walking away from that one.

homebuyer34 · 04/10/2021 11:53

If the underpinning has been done properly and signed off by Building Control, it will not need doing again.
But if only part of the property has been underpinned, and further subsidence occurs in another area, then that too will need underpinning.

That said, I do know of properties that have been built on hillsides that are geologically unstable - The whole hillside is sliding down, and the properties on the slope require regular work or demolition. But this is in California, so not our problem.

homebuyer34 · 04/10/2021 12:24

@KenDoddsDad

We have found our dream house. We had a homebuyer’s survey carried out and the surveyor identified large diagonal cracks externally (quite narrow, but requires investigation), one of which has been mirrored internally. So as not to drip feed, here is a description of the property:

Large detached Victorian house on clay soil. Large old oaks 20m from property, yew trees 7m from property. Suspected cause of external cracking is root damage. Cost of property: £1.3m. We are hoping to live in this property for 20+ years.

Following our survey, we asked the seller for some more information. They have now supplied documentation which says the property was underpinned once in 1993, and twice in 2011. We are 6 weeks down the line and this is the first we have heard of it. We have not been told where the 2011 underpinning has been done (we have now asked for details).

The cracking on the outside indicates further underpinning may need to be carried out, but a structural engineer will confirm this within the next week. Current owner has not had the oak trees pruned in the time they have lived there, so it is believed that if a crown reduction is performed, this will help with the root damage.

Would we be mad to consider purchasing this property? Even if we manage to sort the subsidence, would we struggle to sell the property in years to come?

Hi, an underpinned house will be stronger on that side than neighbouring houses, if the work has been done under the supervision of a structural engineer and signed-off properly. But houses have more than one side and it's unusual for houses to be underpinned all around; only where subsidence has happened. For example, my friend's terraced house is underpinned only at the back, so at the front it's no stronger or weaker than the other houses in the row. Any underpinned house you think of buying should have the paperwork to show the work was done competently and signed off to that effect by someone qualified to judge it. If that can't be provided, you should probably walk away.

Hope that helps. I am not a structural engineer and this advice is only based on personal experience.

Sarah2384 · 04/10/2021 17:06

And a partitally underpinned can be bad news. The underpinned bit might be solid as a rock but the rest isn't. Then when the ground moves in future. the bit which wasn't underpinned sinks and the underpinned bit stays solid, creating possibility of more cracking at the juncture.

TheLette · 04/10/2021 20:22

Surely your sellers should have disclosed this in the property information form? I would not trust them; what else have they failed to mention? You don't just forget that your house has been underpinned multiple times!

BlueMongoose · 04/10/2021 21:19

Underpinned, I'd consider. Many older houses are, and if done properly, they should be sound, though I might get a structural engineer to look at it before committing.
Underpinned 3 times and still has worrying cracks, no.

ShuddaBeenMe · 04/10/2021 21:22

Zombie thread

I'm sure the OP has made her decision by now Wink

bigbaggyeyes · 04/10/2021 21:31

I bought a house that had been underpinned once due to subsidence. The house is in a coal mining hotspot and the coal authority sorted the underpinning 20 years before I bought it. I still sometimes had issues with insurance.

You will struggle to get any insurance, or pay a premium if it's been done 3 times, it's recent and it sounds like it needs doing again.

Step away

homebuyer34 · 05/10/2021 06:54

@bigbaggyeyes

I bought a house that had been underpinned once due to subsidence. The house is in a coal mining hotspot and the coal authority sorted the underpinning 20 years before I bought it. I still sometimes had issues with insurance.

You will struggle to get any insurance, or pay a premium if it's been done 3 times, it's recent and it sounds like it needs doing again.

Step away

Underpinned 20+ years ago and you still struggle to get insurance, it must be nightmare for you!!! My friend who bought an underpinned house (it was done 10+ ago) ,not really struggle to get insurance, start to shop around little bit!!!!
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