On Nov 25, 6:44*pm, Ian & Hilda Dedic
wrote:

Thanks for that, I was hoping to have some alternative suggestions for
construction, so that I appeared halfway reasonable, but as it is our
existing structure, even if the pillars are over the boundary (which
they might be by about 2 inches)

How could you possibly _know_ that? I'm not being rude - this is a
really important question.

Other than confirmation that you shouldn't let them touch your garage,
this isn't something best answered in a DIY forum. However, there's an
excellent "garden law" forum which might help greatly...

http://www.gardenlaw.co.uk/phpBB2/index.php

Start by reading the threads and discussions about what is a boundary,
and what defines it. You might be surprised. As others have said, try
to understand the implications of the party wall act. Also check what
(if anything) it says in your deeds.

You don't want a boundary dispute, and you don't want to fall out with
your neighbour, but you don't want your garage putting at risk either.

More importantly you don't want your neighbours extension doing more
harm than it's allowed to. Check planning permission, foundations,
etc.

Good luck!

Cheers,
David.