What’s a doorman worth?
On the rental side, 12 percent, according to a comment appraiser Jonathan Miller made in the November 2006 issue of The Real Deal.
You can find the entire article by Lauren Elkies here.
If you’re personally trying to figure out doorman versus non-doorman, figure out why you would want one: safety, packages? Be aware that some neighborhoods (Upper East Side, Chelsea) are going to have more dooman buildings than others (East Village, Tribeca).