If you find a good builder they are ace - but it’s hard, we went through a few before we found this one.
Same with all trades. We got a good bunch when we first bought the house. The plumber was recommended by a friend and we asked him to recommend others, such as electrician, joiner, plasterer, which worked out really well - it was a group of "one man bands" who knew each other, and regularly worked together.
Unfortunately, one by one they retired/emigrated, and we went through a period of around 10 years or so just having to randomly pick them as jobs needed doing and it was an absolute nightmare. There wasn't a single one that we'd have back and when asked for recommended other trades, another hopeless case turned up. And no, we weren't going for the cheapest/smallest - we went through a few "proper" plumbing firms and a few "proper" double glazing firms.
The worst was getting a combi boiler from a very well respected local kitchen/bathroom showroom. They just sent a subcontractor who was probably the worst plumber we'd ever experienced. Our initial reaction when he turned up on day 1 was to send him back, but we'd taken up carpets, emptied rooms, etc for the pipework laying, so we felt trapped as we knew we'd never get anyone else at short notice. What a mistake. He was a complete idiot. Not just incompetent, but very annoying also. Constantly sighing, banging things about, and humming Mission Impossible! A 2 day job turned into a week, and then he beggared off remarkably quickly once he'd "tested" everything. Day later, no hot water nor heating and the house was flooded from two separate water leaks. We went ballistic at the showroom and insisted they send one of their own employees to sort out the problems, which took another few days because the floors had to come up again, it turned out some of the new pipework wasn't even connected, leaks were fixed and then it transpired the boiler had been fitted wrongly and needed a lot of pipework re-alligning. We really wished we'd trusted our instincts.
Finally, we've got a good team again, found accidentally by recommendations from an odd job man we had to re-roof our garden shed. He recommended a fantastic plasterer, who in turn, a plumber, then a joiner and electrician - they're all "one man bands" again and work together a lot, even working on eachothers' own properties. It works really well as they sort it out between themselves, i.e. arrange between themselves the timing or order of work that each of them do - a kind of project management role meaning we don't need to stress ourselves. We keep joking with them that we don't want any of them to retire or emigrate. We don't even get quotes from them - we trust them and the bills are never unexpectedly high.