AIBU to be getting pi**ed off at having to mow neighbours grass?

[nervousal]

House next door has been up for sale since we moved in (March). Nobody living there. Our front gardens are attached - no hedges/fence etc. When we've been cutting our lawn we've been doing next doors too - because it'll look really stupid if we let it get to the state of their back garden. I'm tempted to call the selling solicitors and getting them to get sellers to do something about it?

Leave the up-for-sale side to grow. If anyone comes to view the house then the selling solicitors might then feel obliged to get in a gardener.
It has been very thoughtful of you to cut the grass but it is the sort of thing you get no thanks for doing.......

Just as GO has said.

I think you should stop cutting their grass. Draw an imaginary line at the boundary and stop mowing there. It will look unkempt and then perhaps the agent or owner will take action.

will try to just leave it then - though it will look decidedly odd, and from our point of view it'd be better to have it sold than lying empty so thought every little would help? You're right though - we're not expecting any thanks for it - think the seller/solicitor must think the mowing fairies are visiting.

Well you could perhaps let the selling solicitors know that you have been cutting it but are stopping now. You've been kind to your lazy ex-neighbours. If they've neglected the front garden there may well be other aspects of the property that are similarly overlooked (and which you wouldn't be able to help with). Maybe they just need to drop the price a lot.