The stated goal is to apply for a mortgage.
Thus, the controlling factor will be the underwriting requirements of the perspective lendor.
If your file is clean, and the problem is a lean file or short credit history, then qualitifcation will likely depend upon the specific criteria of the lendor for those categories. A low debt to income ratio, for example, might carry the way for approval, with your score then primarily affecting your percentage rate......
I would suggest having an informal consultation with a prospective lendor, and obtaining their review against their underwritng requirements. Credit score alone may not be their primary consideration if you otherwise have a clean file.
