Finishing a basement into a nice room costs from $10.00 to $35.00 per square foot so your 1000 square foot basement would cost from $10,000.00 to $35,000.00
You can save a lot of money by finishing the basement yourself if you're good at dry wall hanging and other carpentry.
In my other home I finished my own basement for $6,000.00 doing it all myself.