I doubt it, the pilot was filmed over 7 years ago and the sets were likely dismantled. Even if they were still around, they are the property of another studio. Besides, the new director and studio will likely have their own vision.
As for the actual locations, the mansion at Hartwood Acres (which was Key House in the pilot) is in my home town, and there have been no plans announced that there will be any local filming in the Pittsburgh area this time around. If shooting begins in January, it's even less likely that it would come back to Pittsburgh, as January is a very difficult month weather-wise.
I think you are referring to the FOX pilot, the Hulu pilot was filmed on location in Nova Scotia, and Toronto. They started filming around the time of my mom's birthday last year, to mid November.