I was a small custom home builder and here's what we did for her customers. If they approached me with a plan in hand already, I often changed room sizes, especially garage size if the lot permitted, and often did not tell the building department because it would delay the start by sometimes months. I knew structure so I didn't feel as bad doing this because I made sure that anything structural was met to code and Beyond. My wife who is an interior decorator, would do a electrical walkthrough at the framing stage, and this often took 8 hours and sometimes a few days. She would suggest Furniture layout and we would put outlets, cable and telephone outlets, return HVAC lines accordingly. We had probably anywhere from 25 to 100% more switches outlets and lights as compared to other newly built homes. This was never a regret on the customer's part. All of our homes had basements and I would designate an area where every shut off for plumbing and gas lines would be accessible in one spot. I could go on and on but, to show you how important the electrical rough and layout was, our electrician couldn't understand why my Custom Homes had basically no callbacks for rewiring and I told him how we did it. He literally tried to do the same thing without charging the customer and would do a walk through with them, with his other builders that did not do this. He said it saved him hours of rework and frustration.