enlarging door entrance

Hello, I would like to enlarge the door entrance from my kitchen to my living room to give it a more open concept look. There isn't a door on the entrance but i believe there was originally. I'd like to expand it about 1.5 feet on bothsides so that it nolonger looks like a door entrance. How do i know if the wall that the door entrance is in is a supporting wall? also there is a light switch that would have to be affected. How would I move the switch and wiring farther down the wall?
Any help appreciated Steve
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not Steve Buscemi wrote:

If you can look at the framing of the ceiling above the door and if it goes the same direction as the wall, it is not likely a supporting wall, but it could be. As for moving the switch, I suggest you have it done. If you have to ask, you should not give it a try.
The instructions for both of your questions really require on site inspection of someone with some experience. Neither is a difficult job, but there are so many things that can be different for your home than standard and I am going to guess, you might not notice a critical difference, you could be making a serious error and endanger yourself or others.
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Joseph E. Meehan

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