I live in Chicago and have dealt with this in my home studio for a few years now to varying degrees, depending on my apartment. ComEd is not the world's best electrical company, and being that most people live on the 2nd or 3rd floor here (which is at the same plane as pole transformers), it's pretty easy to get blasted with EMI and RF.
My first apartment here had a drop that came in right in the room where my equipment was hooked up. It was quite possibly the worst EMI I've ever heard; even BKP humbuckers sounded like unshielded singles. I never found a solution (nor were many available, being that I was renting), but I did find out some tricks for tracking down the source of the EMI.
If you have a new enough Android phone, you can download a few different free apps that will track EMI and tell you what the gauss level is, which is helpful in finding out the source. Here are some examples I found using this method:
1) The aforementioned cable drop with some crazy device joining all the mains that came into my building, which I am 100% sure was the source of the EMI at my last apartment.
2) Tracked down a faulty ground at my new apartment. I have steam heating in this building, and given it's older than dirt, at some point during its lifetime, a hot wire actually came in contact with the plumbing, turning most of my radiators into 120V death-traps. I know. I managed to ground myself out through my guitar on one
The moral of the story is that having the 120V going through the the radiators was causing TONS of EMI (though still less than that last apartment).
The bitch of it is that tracking down bad wiring in your home can be a pain and very expensive. Luckily you're in a newer construction, so one can only hope that someone semi-competent did your electrical. Still, like most trades, there are few truly skilled engineers. Most of the guys you deal with are just in it to make a living, and if they're running their own company, they make that living by doing your wiring in the fastest, cheapest way possible that won't kill you or your family.
For reference, the app I use on my Android phone is for "ghost hunting". But don't let that fool you, as it can turn your phone into a fairly decent EM sensor. When I had my grounding issue in the current apartment, the meter would go crazy any time I held the phone toward my radiator. In fact, my el-cheapo $10 AC-detecting stud finder would go nuts on the radiators. It was so bad in one room (which, ironically, was my home studio!) that I would see my WiFi signal cut in half when coming into this room, and I could even hold that same stud finder up in the middle of the room and have the AC alarm go off.
Anyway, I hope this was helpful for you. One other thing to note that you can try is Zexcoil singles and humbuckers. I bought a set back in the old apartment, and they are the ONLY pickups that truly shielded out all the garbage I was hearing. I ended up swapping them back out for the original Suhr V60LPs in my guitar since I liked the tone better, but they might work wonders for you.
