The basement and attic have the proper ventilation and regress to have them be habitable but should I seek a certificate from the city? 

Make sure the bank files a "Certificate of Satisfaction" with the county clerk.

There were different contractors doing everything she complained about.Handing the judge the Certificates of Compliance (Permits when they are inspected at the end) and the New Certificate of Occupancy pretty much ended the whole thing. 

Simple things like rental certificates can be a bear to coordinate from a distance.Cheers!

Biggest issue is meeting USDA standards and certification. 

This should be helpful as well: https://rivieramayacozy.com/transfer-property-mexico/When selling or buying in Mexico always remember to ask the realtor about his certificate, you'd like to avoid scams at all costs since getting the money back in case it happens can be challenging.

Residential properties, inventory, securities, trust certificates, corporate stock, or partnership interests cannot be exchanged under Section 1031 Internal Revenue Code, 26 U.S.C. § 1031.

@Samuel S. try and send the bank a Certificate of Insurance listing just your personal name. 

Does it make it enforceable: NO.Unless you use some authentication in the chain of signature where it can be traced to a certificate that has been verified as owned by the person in question, these websites are useless. 

Is getting the certifications worth it?