How to compare quotes
Ask whether the quote includes diagnostic time, access delays, permit preparation, inspection return visits, patching or finish protection, after-hours service, disposal, utility coordination, parts availability, and related trade work. The cheapest scope is not cheaper if it excludes the step that will decide whether the system is safe or inspectable.
For older homes, ask whether the quote assumes a working shutoff, a clear panel, an existing drain route, a compatible thermostat, a usable cleanout, a simple side-yard path, or no slab access. Those assumptions are where most surprise costs hide.
