ᐅ Site development timing: Before building road construction or after debris removal?

Good morning

Last week, we submitted the building permit application (as an expedited process, since there is no zoning plan). Now we are considering whether it makes sense or is even possible to connect the utilities before starting construction. The problem is that we have a flag lot, and the driveway runs to the back through the neighbor’s property. Once the construction road is set up, access to the utilities will be blocked, and we would only be able to connect them after construction is completed and the construction road is removed... wouldn’t that be too late? Isn’t a water connection needed beforehand so the plumbing contractor can test the toilet flushing? We are a bit unsure about this. Another issue is that the neighbor’s house is very close to the driveway and has a full basement. Therefore, part of the construction road would need to be reinforced. Do you have any tips on how to do this or if it is necessary? A friend once recommended these mats that distribute the weight. With these, an 11-ton (12 US ton) excavator (loaded up to 16 tons / 17.6 US tons) was able to pass without causing any damage.

It’s early in the morning, so I hope this is clear enough. If not, please ask, and I will try to explain it better.

Best regards and thanks in advance!