Garage Filling

How much would it cost to turn my GARAGE into a FINISHED BASEMENT?

We have a 2-car garage (maybe slightly smaller) that is under the house. I would love to turn this into a finished basement to use as an office and a rec room. I'm guessing that the steps needed to be taken would be:
- Remove garage doors, and fill in the holes (with cinder block, maybe?)
- Drywall the inside (Maybe have to put some wood framing up to attach the drywall to?)
- Do some ceiling work'
- Add carpet.

How much do you think this would cost if I hired the whole thing out? I think I'd also like to put in two windows or a window and a door, as well.
I think that I'd like to do this the cheapest way possible, while still adding quality square footage to my house - and enhancing the value not taking away from it. So, I suppose a price range / ballpark figure is what I'm looking for. Are we talking about $3,000 or more like $50,000? Could it be done "well" for under $10,000?

i think 10 to 13 thousand would be in the ball park.
I have done a very similar job to a Garage that was sunken under the house. I believe with everything it was around 13 k
I framed in their big screen TV in the wall with a 3 foot lift .Then I also made a half wall with the R,O, for a fish tank to be recessed inside the wall. However if you don't add any upgrades i believe 10 or under will do it. It came out very nice and cozy.
Make sure you seal the concrete floor before you put the padding down!!! By all means too..get the extra thick padding...it's so much nicer being it will be over concrete and it will help insulate the floor!! Good Luck

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