A prelien notice is required of any subcontractor that does not have a direct contract with the owner. It must be filed within 120 days after furnishing services. Others have within 180 days to file. Maryland law is unique in that a judge has to order a lien be place after filing a petition for a lien with the circuit court. A mechanic’s lien is allowed only if the work on the property increases its value by 15% or more. Maryland Code Annotated, Real Property 9-102

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