On this house, yes. The page records that the existing layout had load-bearing partitions that needed structural engineering, and that the beam went in with city permit approval.
Whether yours needs one depends on what the wall is holding up and which city you are in. Get that answered before you plan around a finish date, because permit review time is not the same thing as build time.
On this job the page names the system. The bathroom tile went on over Schluter waterproofing rather than straight onto board.
It is a fair thing to ask any contractor, because once the tile is on you cannot see what is behind it. Ask which waterproofing system is being used and ask to see it before the tile goes up.
This one needed work first. The page records that the substrate was uneven and had to be levelled before the vinyl plank went down.
That step is easy to leave out of a cheap quote and it is the reason a new floor can telegraph every dip underneath it. Ask whether levelling is included, or whether it gets added later as an extra.