Real Dictionary

dilapidate in American English
to become or cause to become partially ruined and in need of repairs, as through neglect
intransitive verb: to fall into ruin or decay
transitive verb: to cause or allow (a building, automobile, etc.) to fall into a state of disrepair, as by misuse or neglect (often used passively)

dilapidate in British English
verb: to fall or cause to fall into ruin or decay