And of course working smoke alarms (and if gas, carbon monoxide detectors).  

On their application they both said they're non-smoking, however I recently found a few pieces of evidence that one of the tenants has been smoking outside.

One interesting find during the inspection of the "in law" suite was that no smoke detectors were installed in the furnished basement.That being said, this has me concerned about the potential quality of work that went into the rehab, and whether or not licensed contractors/personnel did the work?

Is it up to fire code (may require hard wired smoke alarms, exit lighting, etc.)?

But,they smoke inside (against the lease) and therefore I have said I wouldn't replace doors and windows with them doing that because of additional damage it causes.Other than that, when they didn't pay that would've broken our lease I would've thought.

Things that we see as recommendations to fix after include:- cut back overhanging branches- add railings on stairs- fix cracked/broken driveways or walk ways- repair roof issues - clear debris from outside or inside- upgrade fuses to circuit breakers- repair broken alarm/smoke detectorsYou should discuss the inspection with your agent. 

LOL, love how many words are used to say no smoking. 

The house does not have any soot deposit nor does it smell smoke inside/outside.

Here’s a list of some of mine. 600+ credit score No smoking.

(This is about taxes)You need a Zoning Permit for Visitor Accommodation:To rent your home for stays of 30 days or fewer.If the property is not your primary residence.Housing requirementsSmoke alarms must be installed:In each bedroom.In the hallway in the immediate vicinity of the bedrooms.On each floor of the home, including basements.Carbon monoxide alarms must be installed:Within 15 ft. of the entrance to every bedroom or within 15 ft. of a bed in sleeping areas if there isn’t an enclosed bedroom.Centrally on a wall or the ceiling, but not directly in front of a door to a bathroom or within 5 ft. of a cooking appliance.Under the installation requirements for smoke alarms if they are combination smoke and carbon monoxide alarms.You can’t post signs for lodging on your home.The home can’t be occupied by more than three people (including the owner and renters) who aren’t related by blood, marriage, life partnership, adoption, or foster-child status.You cannot change your house so that it no longer resembles a private residence.Information you must provide your rentersRenters are only allowed to have guests between the hours of 8 a.m. and midnight.You must tell renters the trash and recycling collection days and any trash disposal rules and regulations.