If you're happy with the figure you've arrived at, and they decline, you could always try a hard line response.porkrind said:
If they try to negotiate, say something like ....
"Well, in that case, seeing as the scaffolding will adversely affect my quality of life, and we can't agree on adequate compensation, you'd better do the work without using my garden, and I'll retain the normal use of my garden for the duration."
And walk away.
See what happens then.
Of course, if there is another way, they might choose to use it and you'll end up with nothing, but if there isn't another way .....
That might be a good time, if they then decide they'll pay your original demand after all, to decide to be awkward. Tell them ....
"Oh, but you rejected a reasonable figure when I tried to do things amicably, and I feel like I'm being taken advantage of here. Maybe it's best if I get professional advice. When I've had a chance to talk to a surveyor, and maybe my solicitor, I'll let you know, and we can take it from there ..... and get a formal agreement drawn up."
If that doesn't light a fire under their willingness to negotiate with you, nothing will.
