Duplex to Triplex Conversion

[Tony Otis]

I'm considering undertaking a duplex to triplex conversion project in Minneapolis, and looking for the best way to go about it.  Zoning isn't a problem, the street is already zoned for 4+ units.  I've heard that converting from 2 units to 3 units requires the building code to meet commercial standards.  Being that its an old building and probably doesn't even meet current residential standards, this seems like a non-starter.  

I'm looking at owner occupying, so one option I'm looking into is an Accessory Dwelling, and I'm waiting to hear back from zoning on if this would solve my problem.  But its hard to justify the renovation funds if I'm going to have to convert it back to duplex when I move out.  I don't think I'd live there for more than a couple years.

Another option would be to find a work around with the rental licensing.  Are there any options for leasing two units with one lease?  Or does the rental inspector call you on it when they see two exterior doors with a dead bolt?

Has anyone here been able to successfully (and legally) convert to a triplex?

Thanks!