1. Observe and protect
Capture the current condition, limit additional damage if it's safe, and pull together any past repair history.
2. Evaluate the house and site
Everything that matters gets covered by tile: drain placement, the framing underneath, waterproofing at every transition, ventilation sized to the room, and the access needed to do the work correctly.
3. Define a written scope
Put preparation, protection, material choices, access, permits, testing, cleanup, and change-order terms in writing before work starts.
4. Compare providers
Verify credentials first, then look at what's actually included in each proposal, not just the price tag.
5. Inspect closeout
Check that testing, cleanup, documentation, and warranty terms are all in order, and clarify future maintenance duties.