What should I ask a plumber or electrician before the work starts?

A few questions save a lot of trouble: 1. Is the visit / inspection charge separate, and is it adjusted in the final bill? 2. Is the price for labour only, or with material? Ask for the material list. 3. How long will the work take? 4. Is there a warranty on the work, and for how many days? 5. Will you give a bill? Get the price in writing in the chat before the work starts. If you used BM Karo, the quote stays in My requests, so you can check it later.