Getting power, gas and water connections issued in Islamabad:

So I am about to construct my home in Islamabad, now that the construction sector is finally becoming operational, and I have a question:

You might all be aware, but I want to know the exact (and as detailed as possible) process of going about getting the connections for power, gas and water in the city? I would really appreciate if you could help. Providing an answer for even one of these would prove very helpful to me.

I want to be thorough in the application so it gets processed without any complications. What is the process of application and the fees for a 5-Marla home?

Thanks in advance for your kind assistance!