This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Being in such bad repair as to seem in danger of collapsing; very dilapidated or rickety: a tumbledown shack.

adj. in disrepair; poorly maintained

"As well might we speak of a "tumbledown" habit in a row of houses, brought on by locomotives running underneath their foundations."

damaged   

dilapidated    ruinous    ricket   

one-room    roofless    tin-roofed    single-story    run-down