Can you sue a contractor for unsatisfortor non-functioning work if no permits were ever filed?

Yes, you can sue a contractor for unsatisfactory or non-functioning work, even if no permits were filed. The lack of permits may impact your case, as it could affect the contractor's compliance with local laws and regulations. However, you can still pursue a claim based on breach of contract, negligence, or warranty, depending on the circumstances. It's advisable to consult with a legal professional to assess your specific situation and options.