The rules for posting no trespassing signs in Massachusetts are shorter than most property owners expect. Chapter 266, Section 120 of the General Laws requires only that you “forbid” entry, and it accepts two methods: telling a person directly or posting notice on the land. The statute sets no minimum lettering size, no required wording, and no specified material. That flexibility puts the burden on you to post in a way a court will later accept as adequate notice.
What Property the Law Actually Protects
Section 120 does not cover every acre you own. It applies to dwelling houses, buildings, boats, improved or enclosed land, wharves, and piers, and it also reaches school buses. The controlling phrase for most landowners is “improved or enclosed land.” Raw, unfenced, unimproved acreage may fall outside the statute entirely until you’ve taken some step to improve or enclose it.
The person doing the forbidding must have lawful control of the property. That covers owners, tenants, property managers, and anyone else with legal authority over the premises. A tenant can forbid entry without the landlord’s involvement.
How to Post So the Signs Hold Up
The statute recognizes two ways to give notice. You can forbid someone directly, face to face or in writing, or you can rely on “notice posted thereon.”1General Court of Massachusetts. Massachusetts General Laws Part IV, Title I, Chapter 266, Section 120 Direct notice is airtight against the specific person you spoke to, but it fails as proof unless you have a witness or something in writing. Signs solve the proof problem by giving ongoing, impersonal notice to everyone who approaches the property.
Because Section 120 leaves the details to judicial interpretation, what matters is whether a court would find your posting sufficient. Practical points that make that finding more likely:
- Wording. “No Trespassing” or “Private Property — No Entry” are clear. Courts look for language a reasonable person would understand as forbidding access. Vague phrases like “Keep Out” are riskier than explicit warnings.
- Legibility. Letters should be large enough to read from the property boundary. Lettering under an inch or two is difficult to see from any real distance, especially in wooded areas.
- Placement. Cover every reasonable point of entry: driveways, trails, gaps in fencing, shoreline access. A sign at the front gate does no work for a back path that people already use.
- Visibility. Mount signs at eye level, and keep them clear of seasonal vegetation. If brush overtakes a boundary each summer, clear around the sign or raise it above the growth line.
- Durability. Aluminum with a UV-resistant coating holds up for years in New England weather. Laminated plastic or vinyl can last five to seven years outdoors. Paper or cardboard often degrades within a single season.
Walk your boundary now and then and replace signs that have faded, fallen, or been removed. A prosecutor has to show that the sign was posted and visible when the person entered. A downed or unreadable sign will not carry that weight.
Signs Against Hunting, Fishing, or Trapping Need More
If your real concern is keeping hunters, anglers, or trappers off the land, a separate statute controls, and it has stricter content rules than Section 120. Chapter 131, Section 36 prohibits hunting, fishing, or trapping on private land without the owner’s or tenant’s permission after the land has been “conspicuously posted” with notices bearing the owner’s or tenant’s name and stating that the activity is prohibited.2General Court of Massachusetts. Massachusetts General Laws Part I, Title XIX, Chapter 131, Section 36
Two things follow from that language. Your name has to appear on the sign, and the prohibited activity has to be identified. A generic “No Trespassing” sign that would satisfy Section 120 may not satisfy Section 36. If you want to bar hunting but still allow hikers, post signs that say so: “No Hunting — [Your Name].” Landowners near state forests or wildlife management areas should look at their posting again before each hunting season.
Massachusetts Does Not Have a Purple Paint Law
Neighboring states, including New Hampshire and Maine, let property owners mark boundaries with purple paint as a legal substitute for signs. Massachusetts does not. Purple marks on trees along your line carry no legal weight here. Signs or direct verbal notice remain the only ways to satisfy Section 120.
Posting Cannot Remove a Holdover Tenant
Section 120 explicitly does not apply to tenants or occupants who entered lawfully and remained after the tenancy or occupancy ended or was alleged to have ended.1General Court of Massachusetts. Massachusetts General Laws Part IV, Title I, Chapter 266, Section 120 The statute says the landlord’s remedy is a civil proceeding. Signs and police calls will not convert a holdover tenant into a criminal trespasser. Eviction runs through housing court.
How Posting Affects Your Liability If a Trespasser Gets Hurt
Signs also matter for the other side of the equation: what you owe someone who ignores them. Massachusetts holds landowners to only the duty to refrain from willful, wanton, or reckless conduct toward adult trespassers.3Commonwealth of Massachusetts. Overview of Elements and Duty You are not required to make the property safe for people who are not supposed to be there, but you cannot set traps or deliberately create hazards aimed at them.
Children are treated differently. Young children may not read signs or understand boundaries. If your land contains something that draws them in, such as a swimming pool, construction equipment, or an unfenced pond, signs alone may not shield you. Physical barriers like fencing or covers are usually needed.
There is also a trade-off worth understanding before you post the whole parcel. Under Chapter 21, Section 17C, landowners who let the public use their land for recreational, conservation, educational, or charitable purposes without charging a fee are not liable for injuries or property damage unless their conduct was willful, wanton, or reckless.4General Court of Massachusetts. Massachusetts General Laws Part I, Title II, Chapter 21, Section 17C If your goal is limiting a specific activity rather than shutting everything down, a targeted sign like “No Hunting” keeps the recreational-use shield alive for hikers, where a blanket “No Trespassing” may not.
What Happens When Someone Ignores the Signs
Criminal trespass under Section 120 is a misdemeanor. A person convicted faces a fine of up to $100, imprisonment for up to 30 days, or both.1General Court of Massachusetts. Massachusetts General Laws Part IV, Title I, Chapter 266, Section 120 A sheriff, deputy sheriff, constable, or police officer who finds someone in the act can make a warrantless arrest.
In practice, enforcement turns on whether the responding officer can confirm that notice was given. Clear signs the officer can see on arrival give the officer what they need to act. Missing, damaged, or ambiguous signs push the situation toward being treated as a civil dispute. That is the real reason sign quality matters more than any checklist.
If the person is not caught on the property, you will typically need to apply for a criminal complaint at the local district court. Bring documentation: photographs of the signs, evidence of when they were posted, and any proof of the entry such as security camera footage or witness statements.