What mistakes should customers avoid when shortlisting plumbers?

Don't choose based on price alone; the cheapest quote often hides extra costs or longer lead times. Avoid vague scope or missing warranties; insist on a written plan and a clear guarantee. Don't rely on recommendations without checking licences and public liability cover. Narrow to a couple of options who meet the scope, have available dates, and come with solid references. This usually narrows the options to the strongest matches and makes the final decision straightforward.