Before you even contemplate this renovation I would have a structual engineer look at my existing structure to see how feasable it is. It may be much more costly than you think to meet code. A lot of builders will tell you one thing but when the inspector show up his modifacations won't pass building code. You have to consider plumming, wiring, structure, air conditionng and your sanity as well as what your budget can stand. I am not wanting to put a dampner on things, I just don't want to see you get burned and taken for a bunch of money.

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The Mind Is Your Limit. As Long As Your Mind Can
Envision It, You Can Do It!