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I'm in the process of buying a house that has large trees in the garden. I noticed on the documents for the house that some pipework, cabling and drains run fairly close to one of the trees. What kind of expert do I need to take a look and tell me if the trees are likely to be causing a problem? The trees are under a preservation order, so I would need a tree surgeon and planning permission to do any work to them, but I'm guessing a tree surgeon would be more interested in the upper parts, and might not be the best person to assess any damage at or below ground level. Any thoughts welcome :)

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I had similar concerns with my home purchase in the U.S. about 7 years ago. It was noted on my home inspection that A tree had been recently removed (long enough ago for grass to re-grow over the area but there was still a depression) from the front yard where the main lines go.

I had a plumber run a scope down the lines starting at a basement cleanout/drain and inspect the lines all the way to the street to determine if there is any current damage from roots (or anything else). Cost me an extra $125 but most of that was simply the service call fee (compared to the estimated 10K repairs would have cost, I was happy to pay it).

Of course, this only checks for existing damage. There is the slimmest of chances that a tree root could be just on the verge of busting through which would have been undetectable but in my case where the tree had already been removed that chance is diminished since tree roots eventually stop growing after the tree is removed. In your case (with live trees), it would be a higher chance but still unlikely and there really isn't anything else you could do to prevent it that would be cost effective.

  • Yeah, this is the way to go. Drain lines are your biggest risk and a scope will tell you how big a deal they are. – Shimon Rura May 24 '16 at 13:01

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