Basement is huge - almost 1700 sq ft, but it's a sprawling ranch with no second floor. I'm in the northeast so I had to insulate as well. Me and a buddy framed it out and wired it (he's a licensed electrician) - I traded him an old snowmobile I had. I had already plumbed in a framed bathroom when I built the house. So far in materials - framing, insulation, wiring I'm at about $3000. Another, $1000 for the sheet rock, $2250 quote from someone who will mud/tape/sand/prime all sheet rock, another $2300 for doors/closet doors, $1100 for trim materials, $3000 for flooring and $2700 for drop ceiling (grid system/2x2 tiles), $1000 for paint. Considering a few more unknowns, I'm looking at a DIY tab of around $17,000 - $19,000 finished (unfurnished, of course).Will easily give me four times that in equity.