Conditions and access
Damage you can't see until it's opened up, tight access, occupied rooms, height, slope, landscaping, and finish protection all shape labor and sequencing.
Scope and materials
A solid proposal states the repair boundary, needed system capacity, compatible materials, disposal method, testing, and restoration in plain terms.
Permits and specialist input
Some projects call for permits, inspections, engineering, environmental testing, or specialty trades outside plumbing. Check current requirements with the provider and the relevant authority.
Educational planning only
Treat this as background, not an offer -- request a written, property-specific scope and number from any provider.