Ramshackle describes something that is dilapidated, in a state of disrepair, and likely to fall apart. It suggests a building or structure that is old, poorly maintained, and in need of repair.
Here are some synonyms for ramshackle:
* Dilapidated
* Run-down
* Crumbling
* Rickety
* Janky
* Shoddy
Example:
"The old house was a ramshackle affair, with peeling paint, broken windows, and a roof that seemed to be threatening to collapse."