N.Y.C. Admin. Code § 28-204.6.2: § 28-204.6.2 Lien.

All such unpaid judgments shall constitute a lien upon the property named in the violation with respect to which such judgment was rendered when the amount shall have been definitely computed as a statement of account by the department, and the department shall file such statement with the department of finance for entry against the property. Such lien shall have a priority over all other liens and encumbrances except for the lien of taxes and assessments. However, no lien created pursuant to this section 28-204.6 shall be enforced against a subsequent purchaser in good faith or mortgagee in good faith unless the requirements of section 28-204.6.1 are satisfied.