I have a kitchen area size 5.5m x 3.5m which, although the floor is flat, slopes down across the 3.5m width by approx 22mm - in other words approx 6mm per metre. Some floor levelling has already been done but I can't go any higher because of a door threshold. Is that degree of slope acceptable ? Thanks for any responses.
As long as nothing sinister is happening, i.e subsidence of some description then it's whatever you feel is acceptable to live with. A lot depends on the type of property. If its quite modern, then it its going to seem 'out of place', if period then its 'characterful'. It sounds like that unless you want to create a step into the kitchen, then you'll have to dig it out and put a new floor down, or live with it and keep packing the table up with beer mats and swap your dog for a mountain goat