Sell my Condo to remodel House?

[QUyen Dang]

Hello - I purchased a house for my parent and it has been paid off and it's a very small house(2 bedroom and 1 bath) with potentials. I would like to expand the house (add 2 bedrooms, 1 Bath, and 2 car garage) or perhaps build another house in the back (Zone R2). What is a good option to obtain funds ? Should I sell my current condo and obtain the money or take out to Home equity line of Credit from the paid off house? Any advice is greatly appreciated. 

Thank you,

GD