Zoning different for duplex vs triplex?

[Kelly Conrad]

Hello! We found an awesome duplex that we think has the potential to be turned into a triplex down the road. I've found that it is zoned RT1 per this: https://www.stpaul.gov/departments/safety-inspecti...

However, it doesn't seem to mention a triplex, especially if it's in a home in a residential neighborhood and not a small building. What zoning does that fall under?

[Dustin S.]

You would need RM1 or higher. RT1 allows for up to 2-family properties.