non-conforming 5th unit

[Tyler Cote]

We recently purchased a 5 unit with strong financials as out of state investors. Recently, we learned from the PM that it's a legal 4 unit. It was represented as a 5 unit on MLS and through conversations with the broker, we used a commercial loan to purchase, yet the tax card clearly shows only 4 units. Apparently the previous owner knew this and had tried to convert to conforming 5 unit but was told there was insufficient parking. Our concerns are 1) uncertainty of liabilities in CT 2) decrease in re-sale value down the line 3) possible loss of income in Unit 5.

Any thoughts, opinions are previous experience with non-conforming unit?