I’d say there’s no hard and fast rule tbh and some things take so long (like utilities) that you’d be a fool to wait. Also every plot is different. We were lucky in that we already had a building on site so could use the existing utilities to start building while waiting for new utilities to be connected.
if there’s no utilities on site then I’d suggest water and power are essential to start as your trades will need them. The electric company will run a temporary supply and your sparky will need to connect to it (afaik).
but, like I said, we didn’t need any of that so I’m probably not the best person to answer