Wife and I went in and did this last week. In and out in 5 minutes and they even gave our son a lollipop!
Yes they will notarize there at no additional charge. They also have a photocopier there as well though we brought both copies we needed. Both the ladies behind the glass were friendly and even started joking about people always stealing their pens which of course you know.. The courthouse! Lol
Side note.. I got dinged at security due to my keys and the carabiner clip I carry them on. Guard said it could be used as a weapon to strike someone with and proceeded to put them on his fist and take a fake jab at me. I laughed asking if I could take one at him then I asked about my keys and he said those would be ok. I then asked if he had ever seen the aftermath of keys used in a fist fight. This actually caught him off guard and it clicked. This was all done and talked about with a bit of humor and smiling.. Not just being a wiseass. I ran the carabiner back to the car just up the street on 6th iirc and when I got back he actually continued our conversation for a couple more minutes. All 4 of the guards were super fun and easy to talk to.
So.. Don't take anything in that you do not actually need with you.
Also, no cell phones are permitted inside the building. Wife read this online so we knew to leave them but it's also posted outside the doors to the building.