Plaintiff's notice of mechanic's lien, which was filed after the recording of a condominium declaration on the subject building, is invalid under Lien Law § 9(7) as against specific condominium units because, by setting forth the former superseded single lot number for the entire building rather than the separate lot numbers assigned to each unit in connection with the conversion, it fails to properly describe the specific units that plaintiff sought to encumber (Matter of Atlas Tile Marble Works, 191 A.D.2d 247). Under Real Property Law § 339-l(1), such a post-declaration lien is also invalid as against the building's common elements because it was filed without the unanimous consent of the unit owners (id.). Lien Law § 12-a, which allows amendments of notices of lien nunc pro tunc, "presupposes the existence of a valid lien and may not be construed to revive an invalid notice of lien" (id.). A contrary result is not warranted merely because the lien's misidentification of the lot numbers and owners was the result of plaintiff's apparently inadvertent failure to make a thorough search of the relevant public records (see Matter of Kleet Lbr. Co., 197 A.D.2d 576, 577). Nor does it avail plaintiff that the former owner bonded an invalid lien (see Matter of Diamond Architecturals v. EFCO Corp., 179 A.D.2d 420, appeal dismissed 80 N.Y.2d 919), or that its answer did not affirmatively plead the lien's invalidity (see Spring Sheet Metal Roofing Co. v. County of Monroe Indus. Dev. Agency, 226 A.D.2d 1064, 1066).
THIS CONSTITUTES THE DECISION AND ORDER OF THE SUPREME COURT, APPELLATE DIVISION, FIRST DEPARTMENT.