Conventional MF guidelines?

[Bruno C.]

Hi all! 

I'm looking to put an offer on my second property, a 3-unit in the MA/RI area. However, I'm just curious about lending guidelines on conventional mortgages that are non-owner occupied. Is there a minimum down payment % requirement? 

Historically I've seen 20% but I'm curious if it's more like 25% or 30% depending on the number of units or number of properties you have. 

Anyone who could point me in the right direction (even just with) would be greatly appreciated! 

-Bruno