We've had experience with properties where the existing tenants broke windows, walls, plumbing fixtures, then complained to housing/code enforcement that the house was uninhabitable. 

As others have said, read the by-laws  carefully as to what is allowed and not allowed for rentals, and also makes sure that the by-laws are actually enforced.

If they are VERY professional, they will have their processes in writing as verification that it is enforced equally and fairly by their entire staff.6.

I have received advice from one of my NH attorneys that the new landlord does not have to honor the lease, because the agreement was between a tenant and a person or entity that now doesn't own the property and therefore has no ability to enforce the contract. 

How do you enforce it?

If they are VERY professional, they will have their processes in writing as verification that policies are enforced equally and fairly by their entire staff.6.

Seems this sub can file a unpaid balance mechanics lien if he wants to, but AL puts a time limit of 6 months for him to commence with the enforcement or perfecting of the lien by filing suit in court.

You can call the code enforcement or permit office for your county.

North Carolina has become very stringent in deck code enforcement due to many deck failures in the past.

The only mention of occupancy that I could find was an archived memo from 10 years ago, with a nebulous statement about how "generally, three non-relatives is okay," or something along those lines.I'm currently living in a 3BR SFH with three other people; my landlord says there is zero guidance and occupancy is not something that is ever enforced, even during her previous appearances in eviction court.This is mind-blowing to me, as a refugee from another college town with absurd anti-landlord & anti-AirBnB rules (cough, cough Auburn, AL).