In the HMDA GIR - Appendix A page A-2 it states to code the Owner Occupancy of the property to which the loan or application relates. In this case, the loan is to purchase a non-owner occupied dwelling. The fact that an owner-occupied dwelling secures the loan is not relevent.
Likewise on page A-4 for property location, you enter the location of the property to which the loan relates.
If you think about it, coding the loan as an owner occupied purchase with the address of the already existing primary residence would not be correct. Your LAR would be indicating that your customer just bought his or home again.
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CRCM,CAMS
Regulations are a poor substitute for ethics.
Just sayin'