Side by Side vs. Over Under DUPLEXs

[Account Closed]

Hello All,

I am looking to buy my first investment property and had a few basic questions about multifamily units. There are many properties in my area that are 'Over/Under' two story multifamily units available for sale. These units look to be built with with concrete block but I was wondering if the second floor is primarily just wood joists and thin wood to make the second story? Is it possible for any of these properties to have a concrete second floor? The reason I ask is because it seems like any step in these units would annoy all other tenants. I have seen 4 units that are smushed together on top of each other under one roof and was trying to understand how the noise is not a problem in any of these properties? I am leaning towards side by side investment properties but some numbers do make sense on these 'over/under' rentals but I think the quality of tenants would be much different!

PS- I have attached an image of a 2 story 'over under' duplex and was wondering if this second floor is made out of wood or concrete... would the tenant hear the person below??