costs estimate for enclosing a "basement room"

[Doc]

We have an apartment that is above a two-car garage and a storage room -- unfinished but above ground with windows. The apartment is 900 sq ft but only one bedroom. Thinking about fixing up this "raw" room to be an extra bedroom.

Anyone here have any idea how much that type of renovation would cost? We'll get estimates of course, but would like to have some sort of base to start with. And, we might be able to do some of the work ourselves. Sweat equity.

Thanks.

[Harry Chickpea]

That is about the easiest job possible. I suggest doing it on your own.

[Toads tool]

I would do all the electrical and insulating myself.
The drywall is something I would hire out.
Depending on your idea of how and what you want, as well as how beefy you want to build it all play a major roll in "what it will costs".
Is it already studded, concrete or brick walled, just inner walls or will the exterior neeed studded out?
What floor covering bo you want? A real biggy, paint will only be a couple hundred total where tile,carpet, and wood can all be figured by the sqare ft. and are priced accordingly.
Plumbing involved? A little bathroom can run into a grand easy.
Electrical- does it have adequate service or will you have to put in another breaker box? If need be you may have to purchase a box, i would consider upgrading the main box and reusing the existing for the new addition; if that's the case.
You can go shop light to chandeliers as far as lighting. You are talking over a hundred just for basic romex, outlets, wire nuts etc. if you don't already have that on hand. And that's going cheap.
What type of wall covering? Paint is cheap but has to have a good base to go on, that's where Drywall comes in. Wallpaper costs more and has more labor, but can cover fairly crappy walls. Paneling is DIY friendly but costs even more.

I would suggest you get the ads out of your local papers and sit down and figure out what you want.
Review what your abilities are with an honest critical eye. Know your limitations.
That's why I say hire out drywall. It can be done by oneself but some jobs take skill and the two guys that have the right tools for the job to do it right. Balancing a sheet of sheetrock on ones head while trying to screw it in is harder than it looks and pains one for weeks after.

[Doc]

Toads Too -- thanks for the thoughtful questions/comments. The floor is concrete but I'd probably want wood installed or something else. Walls are studded and just need insulation/drywall. Electrical -- I have a great guy who does work for me at a discount (works as an electrician for the city and moonlights on the side). Breaker box has plenty of room.

It's the ceiling that might be a problem. There is ductwork for the upstairs exposed and might be too low to be closed in -- I'm sure there is a way to fix it. Exterior is fine. I'd replace windows and add door -- and stairs to the top floor (probably a big deal?).