knockdown
n. countable C2 Proficiency US //ˈnɑkˌdaʊn// UK //nˈɒkdaʊn// knock·down
n. a very cheap or low-quality house. It is a slang word used mostly in the UK to describe a place that is falling apart.
n. a dilapidated or poorly constructed house, typically in a working-class area.
He moved out of the knockdown and into a better flat.
The estate was full of knockdowns that had not been properly maintained for decades.
While the neighborhood has seen significant gentrification, the original knockdowns still stand as a testament to the area's industrial past and the housing shortages of the mid-twentieth century.
From knock + down.