https://en.wikipedia.org/wiki/Brihanmumbai_Municipal_Corpora... has more info including controversies.
Also, regarding housing specifically, due to a perpetual population growth and inflation, many buildings sit empty because builders know that people will cave in, even if property is temporarily overpriced and no one is buying them in the short term. Additionally legal disputes often block up other buildings, resulting in large dilapidated buildings sitting in the middle of busy/high-value areas but providing no benefit.