BrickUnderground

Hi,

For an average sized TH say 20x40 on a 20x100 lot- What should be the general price differential between a fully gut renovated 1 family with its not renovated 3 family sibling?  Let's say same street a few doors down, same aspect etc. If the same buyers were to put in an offer for both, what's the average differential for renovation expenditure and time?  Thanks.