[jjoonathan]

You sell the lease if you want to move. As for imprevements, we already deal with pricing and depreciating them for tax reasons. The new leaseholder would have to compensate the old leaseholder. This process will be imperfect, but the imperfections seem mundane compared to the imperfections caused by tying a financial asset to shelter and especially mundane in places where land value trumps improvement value or where depreciation schedule matches lease duration (both of which are common). We are trading big problems for small problems.