buying primary residence with addition that can be rented?

[Jeremy H.]

It is not a investment property, it is primary residence mortgage I want to apply for.

When I looked at some houses with addition (permitted, not garage convert type) that has a separate entrance that could be rented out. Is it possible to consider potential income in the DTI for mortgage application?

I am guessing you cannot count it, or else similarly you can say you would get a renter or roommate in your living space and ask the bank to count it .