What exactly do you mean by builders OP?
If I called in a single tradesperson to fix plumbing/electrics etc then yes, I would offer tea/coffee/cool drink maybe biscuits/cake if I had them.
We are currently renovating a derelict property and living in a tiny, static van. Renovations have been going on over 18mths. Some days there are 8 or more, different tradespeople here. At the start, I started making teas/coffees. I WFH full time- in the van and after requests and banging on the van door 5+ x a day- i refuse now.
They have their own kettle, cups and supplies in the house now.