Would this home be considered residential rather than commercial?

[Nicole Wood]

I found a home for 170k that is a triplex. It also has a single family home on the property so technically there are four units. However, does it make a difference if the single family is not attached to the triplex? I am trying to figure out if conventional or FHA would work for that property or if a commercial loan would be needed? I plan to call a lender and ask Monday but figured I would reach out here just to see if anyone knows.

Thank you!