Brian Gaff (Sofa) wrote:

...is the bungalow built on a concrete raft over an old clay quarry?

It's certainly on a raft and underlying it is - I think - mainly stony clay
with some shingle. Not a quarry, though. As far as I know, this area used
to be open fields.

...and the porch fell off a couple of years ago.

That's very reassuring! If the noises continue I'll get someone in (maybe a
structural surveyor?) to advise.

Thanks.