In a single story ranch type home, an average schedule by one (possibly two workers) would be 3 to 5 days. With the biggest variable being the new tub surround; is it molded fiberglass or ceramic tile?
2 to 3 weeks with inspections
2-3 days total depending on the condition of all the walls and floor when installing a new tub and surround. Of course there are other factors that can come into play if there’s any Plumbing issues or any pipes that need replaced or moved.
Depending on w/inspections (plumbing, electrical & building) pro contractor, you are 3 weeks in.
No inspections w/no plumbing, electrical being relocated, someone who knows what, and how to . you are 1- half week
Our company, Jddesignconstruction typically would estimate this as taking about 2-4 days , depending if everything ( shower type, toilet type, and sink type) is available at your convince.