I've just done a kitchen floor for a friend and their washer wouldn't fit \ adjust enough to be able to tile under it, so I just tiled under the lip of the washer front.
I told them before hand that there was going to be a height issue with the washed and work surface if tiled and ask if they wanted lino instead, but they said no they wanted it tiled, so whenever they need it repairing or replacing the plumbers going to be a happy bunny
I was thinking of digging the floor up in the washer space area enough to lower it enough, but it's a brand new kitchen and they didn't want hammers\chisels going anywhere near their new units
