adjective

worn out or ruined because of age or neglect.

a row of decrepit houses

dilapidated,rickety,run down,broken-down,tumbledown,ramshackle,worn out,derelict,in ruins,ruined,falling apart,falling to pieces,in (a state of) disrepair,creaky,creaking,gone to rack and ruin,on its last legs,battered,decayed,decaying,crumbling,deteriorated,deteriorating,antiquated,superannuated,the worse for wear,rumpty