Electric Ceiling Heat
You didn't say if the heating is in the highest floor of the house, and if the house has an attic. If it is, then the wiring is probably in the attic and would not be a problem. Also, if the wiring is in walls, but those aren't the walls you want to move, then it probably wouldn't be a problem.
Any other set of conditions would have it's own set of problems and difficulties. Far more information is needed.
The room in question is on the lower floor with a floor above it. The thermostat is not on the wall that we want to move. The wall we want to move will shrink the room by about 2ft.
good luck and happy hunting
I have a feeling its enbedded in the plaster from what i have seen when we put a can light in.
The canned light we put in was just replacing an existing ceiling light. From what we have researched already, we know that the heating cables start 6 inches from the parameter of the room walls and do not exist where original lighting was installed. We have thought that maybe we could cut the plaster (severing the cables) where we want to build the wall, and then have a professional electrician repair the cable breaks and then we could replaster the ceiling section to the new wall. We really don't want to abandon the whole ceiling heating system (for a baseboard or wall heater) as we really like the ceiling heat system!