Bathroom remodeling in New Mexico meets adobe, hard water, and nights cold enough to freeze a line in an exterior wall. Older baths are small plaster rooms with a window and a tub that has been scaled for years. Newer baths are ordinary alcoves on a slab or a wood floor. Moving a drain in adobe or in a slab is the decision that controls the job. A vanity swap is not that decision. In the northern towns the new shower also has to keep supply lines off a wall that sees real winter. In the south the same shower mostly fights mineral and sun.
Say whether the layout stays. Tub for tub, tub for a tiled shower, or a toilet that moves. Ask what waterproofing goes behind the tile and whether the valve is new. Ask if a softener feeds the room. Well water in rural counties can be harsher than city water, so say which you have. Ask who patches plaster. Adobe and plaster do not take a drywall patch and look right. If a window sits in the shower wall, decide if it stays, because wind-driven rain and a flat adobe sill are already a leak history.
Fans matter in monsoon weeks and in cooler houses that add humidity on purpose. A fan that dumps into the attic does not finish the job. Ask where the duct ends. Ask about blocking if someone needs a bar, and about a curb that can be stepped over, before the wall is closed. Radiant floors and odd levels show up in older adobes. Mention them so the shower slope is not designed for a house you do not have.
Name the town, because a Taos freeze and a Las Cruces summer are different risks for the same fixture. Call the number on this page.