No, it does not affect your lien rights. A GC can lien a job even if there is no NOC. A general contractor is not obligated to prepare or record the NOC.  Under Florida Law, that obligation belongs to the owner of the property.  However, many contractors assist owners in completing and recording the NOC to expedite the start of construction.  The NOC is generally needed for all construction that requires a permit or is over $2,500.  In certain situations, there may be exceptions for emergency work, but whenever possible, a Notice of Commencement (NOC) should be prepared and recorded.