3 rules for unincorporated Plymouth County, Massachusetts.
Verified from official government sources
Towns, not Plymouth County, regulate signs, through zoning bylaws authorized by MGL c.40A. Those bylaws must stay content-neutral: after Reed v. Town of Gilbert (2015), a town cannot give political signs a shorter display window or special size limit based on their message.
MGL c.40A §1A
Ordinances and by-laws, adopted by cities and towns to regulate the use of land, buildings and structures to the full extent of the independent constitutional powers of cities and towns to protect the health, safety and general welfare of their present and future inhabitants.
No Plymouth County rule governs garage-sale signs; towns handle them through local sign bylaws. On your own lawn a yard-sale sign is generally fine, but a sign staked in a public way or a state right-of-way can be removed by the town or MassDOT.
No Plymouth County or state law limits holiday lights, inflatables, or yard displays. Towns rarely regulate seasonal decorations at all, and where a bylaw touches signs or nuisances it must stay content-neutral. A homeowner can put up lights and displays without a county permit.
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