Problems after purchase

[Dmitry Feldberg]

Hey bigger pockets community. Not sure if this is the right place to post about this but here goes. We purchased our 2nd STR and I believe we screwed up on the due diligence. We got an inspection and got title insurance which I thought was enough but we did not look into the zoning of the house. We bought the house as 4 bed 2 bath, but the house has a 1,000 gallon septic tank which makes the house zoned as 3 bed 2 bath. We knew about the size of the septic tank but we are new investors and did not know that its too small for a 4 bed 2 bath house. We learned about this problem when we were denied for an STR permit from the township and notified that we need to increase the size of our septic tank.

Is this septic tank issue completely our fault or is there any recourse we can take with the sellers? I feel like such an idiot for missing something like this. Any input is greatly appreciated.