asbestos shingles and rehab

[Kathleen Frankovich]

Hello.  I am looking at a cottage built in 1920 that I was told most likely had asbestos shingles on the outer walls.  They are in very good shape so I wouldn't be too worried about it except there is a tinyl back porch that I want to pull off and the windows need to be replaced.   Would this work cause the siding to be disturbed and possibly cause problems for us?  This would actually be our first flip and we want to avoid environmental issues if we can.  Thanks.