Depending on where you live, you will also need building permits and inspections and all that other nifty stuff... You will also want to check to make sure that there are no resctrictions on how high you can go with the second floor.
I wouldnt even begin to know where to tell you how to start, but if you are talking about taking down the roof and rebuilding... that's a huge undertaking, it's not like switching out a sink...
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Free your heart from hatred. Free your mind from worries. Live simply. Give more. Expect less.
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