basement value

we are buying a house, 4 story + english basement, in Park Slope with another couple. They are taking the top duplex. We are taking the bottom. We also want to “purchase” the basement since it’s connected to our apt. and has a kitchenette and bath which we can use as a living space for an au pair.
It is a pretty crummy place right now but of course is of resale value, more to our apt. than theirs. (there is common space where the boiler etc… is and we must figue that in too).Any ideas on how to value this space? What % of the total value of bldg? Or is their some other way to figure it?

By | 02/28/2005 2:52 PM