0 a house that is not in good condition, that someone buys with the intention of working on it, improving it, and increasing its value:
The property is definitely a doer-upper, as the building needs to be completely modernised.
This could be one of Britain's finest houses but for now, it's a crumbling ruin - the ultimate doer-upper.
Consider the property a "doer-upper", needing complete renovation.
