New showers and tubs, including tile surrounds and fixtures, installed as part of a full remodel or as a standalone project if the rest of the bathroom is staying as-is and it's just time to replace an aging shower or tub.
Yes, that's a common standalone project.
Yes, including converting an existing tub to a walk-in shower if that's what you're after.
Proper waterproofing membrane and drainage slope, done correctly the first time so it's not a problem two years from now.
Tell us what you're thinking and we'll set up a time to walk the space.