Not much, if its marginal land. 109 Dingletown has sold for $1.150, a drop from its 2009 asking price of $1.690. The house is livable but I’d guess it contributed zero to this price. The lot is located down a looong driveway which doesn’t get counted in FAR calculations, so you lose there, and much of the remaining land is cliff. But a decent enough, albeit very small back yard with a pool badly in need of repair.
I think – he can correct me – this was the exact price I told my client he’d pay if he wanted it. Turns out he didn’t.