Peter Crosland wrote:
As I understand it from a previous thread a week or so back, it is
permissable to build a garage extension right up to the boundary
between neighbouring properties and the foundations can actually
cross over.
The idea being to eliminate unsightly gaps between extensions built
side by side. If this is the case, what happens when the second
person to build then wants to build up to the boundary too? Does his
wall bear on those original foundations? If so, what happens if
those foundations
are only suitable for a single story and the second person wants to
build higher? (I may be in a similar situation sometime. The
original thread fizzled out.)


I did not see the original thread but it certainly is NOT acceptable
without permission, preferably by altering the deeds, and in many
cases building regs and/or planning would prevent it. If you want to
build right up the boundary where there is another wall the sensible
thing to do is agree this with the neighbour and plan ahead.

Indeed, a friend of mine feel foul of this when the footings for his
extension were being dug.
The neighbour pointed out the pitched roof and gutter of the extension would
be over his garden.
So the plans and footings had to altered and there was significant extra
expense incurred.