Tumbledown (adjective)

1. Fallen into ruin or decay, often in an irregular or slanting way.
2. Dilapidated or neglected, in a poor condition.

Origin:

Derived from verb 'tumble' which means to fall down or to collapse.

Examples:

1. The old, tumbledown cottage was in need of major repairs.
2. The once magnificent castle was now just a tumbledown ruin.
3. The tumbledown fences needed to be fixed.
4. She lived in a tumbledown apartment on the outskirts of the city.
5. The tumbledown walls were all that remained of the ancient temple.