A general inspection of the bathroom by your preferred contractor will help determine your course of action for removing the tub. Tubs are generally attached atop a bed of mortar and locked onto the wall studs with a set of screws. The screws will have to be removed before the renovator can pry the tub away from the wall frame; the wall studs and subfloor should also be stripped.
With the bathtub’s old area now stripped bare, you can talk to the contractor about determining the prospect material for the shower pan. Anderson said most pans are square or rectangular models, with custom renovations requiring specially-shaped concrete pans. In some cases, the pan’s drain hole may be mated to the bathtub’s original drain, but the sloping should be enough to facilitate drainage.