This guide covers municipal code enforcement from the inspection through the lien, for owners, tenants, lawyers, and municipalities. Part 1 explains the police power foundation and the layered sources of local regulation. Part 2 treats inspections and the Fourth Amendment limits established in Camara and See, including administrative warrants and licensing-condition problems. Part 3 sets out the due process requirements for notice, hearing, and appeal. Part 4 covers penalties, liens, and the excessive fines analysis now available in every state court after Timbs. Part 5 addresses abatement, condemnation, demolition, and receivership. Part 6 catalogues the defenses in order of practical success. Part 7 covers the tenant and neighbor side, where enforcement is often the only working remedy. Parts 8 through 13 address special contexts, criminal citations, federal claims, appellate review, municipal drafting, and a worked example.