Most signs require approval of a sign permit from the Department Planning and Code Enforcement. However, some signs do not require a permit, though they are often limited by size, number, or length of time. For more information see below.
Which signs do not require a permit?
Full information on all sign requirements may be found in Appendix A of the Zoning and Land Use Code, Article XII, Section 16 Signs Sec (lewistonmaine.gov)