Look at section 230.79 NEC.
If it is a house,i.e. single family dwelling then 100 amps per 230.79 (C)
If it is commercial 60 amps per 230.79(D).
If you have a permit for the job then have the issuing agency or zoning confirm what the building is for the appropriate electrical connection.
Note; Exit signage & lighting is not required in a S.F.D. and smoke detectors are not required in small commercial so the requirements are being applied for both uses.
Somebody needs to decide what the building is, either residential or commercial.
If it was easy, anyone could do it.