Groundwork & Foundations Question

Structural engr advice please

I am a builder and have at last started my own single storey extension. However I am 7m away from a tree and, of course, the local building control are concerned and want me to dig foundations of 2.35m!! as there is also some clay but still, thats a massive amount of concrete for a rear porch!
I am after any advice from any structural engrs/or builders who know an alternative to digging that depth or know a way around it? I thought I'd ask on here first before contacting a structural engr.
I appreciate any info you can give me.
Kind Regards.
Neill Reade
NR Building Services.

7 Answers

In response to your question! I had a simular problem at one of my jobs my dig was 3mtrs deep. I was in the same mind as you are now thinking surely this is ridiculas there must be a way around this. After days of deliberation i finally commisioned a structual engineer. One week later and seven hundred pounds lighter he came up with the same equation as the planners. Some times we just have to go with the local authorities. Good luck with your build
Regards Ken

Answered 10th May 2011

Goldcrown Building Contractors

Member since 19 Nov 2008

No feedback

listen to building control if you upset them it will bite you

Answered 10th May 2011

Midas Installations Ltd

Member since 1 Mar 2009

piling is the best alternative ,then reinforced caged footings on top ,

Answered 10th May 2011


Member since 7 Jun 2008

Being a builder yourself you should know the best way is to do exactly what the shirts at building control say,its far easier in the long run.We may not always agree with what they say but we need them on our side.

Answered 10th May 2011

m w building construction and property maintenance

Member since 28 Sep 2008

yep either pile it or dig it deep!!!

Answered 11th May 2011

ibuild building services

Member since 28 Jun 2008

dig down to the correct level and fill up with semi dry concrete leve it 200mm low then top up with wet stuff this way u can get it level and are not up to your waste in it regards damian

Answered 15th May 2011


Member since 18 Jun 2008

had simmilar problem
solution was reinforced concrete raft 300mm deep was still cheaper than the cost of the deep dig

Answered 18th May 2011


Member since 23 Jul 2010

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