Boundary disputes are the kind of legal problem most homeowners hope they’ll never have, and a meaningful minority of them eventually do. The good news: there is a well-developed body of Illinois law and a clear order of operations for resolving them. The bad news: that order of operations rewards moving early.
Start with the recorded survey
Every developed property in Illinois has a plat of survey — a recorded document showing the legal boundaries, easements, and any setback lines. If you don’t have a current one, a licensed surveyor can produce one for a few hundred dollars. The plat is the starting point for any boundary disagreement.
Many disputes evaporate at this step. The neighbor’s assumed line was wrong; the recorded line is clear; the conversation ends.
When the survey is contested
Sometimes both parties have surveys and they disagree. This typically happens when:
- The original subdivision plat is ambiguous (older subdivisions, especially).
- Monuments have been moved or destroyed since the original survey.
- Two surveyors use different reference points for the legal description.
- Adverse possession or prescriptive easement claims complicate the title.
In these cases the court (or, more practically, a mediator) often orders a single agreed-upon licensed surveyor to produce a definitive survey, with both parties agreeing to be bound by it.
Encroachments
An encroachment is when a structure (fence, shed, driveway, garage, deck) sits on someone else’s land. The remedies depend on facts:
- Mutual mistake, recent. Often resolved with a written easement agreement and a small payment, or by moving the structure.
- Existed before the current owners bought. May trigger a title insurance claim, depending on the policy and the location of the encroachment.
- Open and notorious for 20+ years. May give rise to an adverse possession claim, but only if all elements are met — hostile, open and notorious, continuous, exclusive, and under claim of right for the statutory period.
- Authorized by a now-disputed easement. Requires interpretation of the original easement language.
Adverse possession in Illinois
Illinois recognizes adverse possession after 20 years of continuous, open, hostile, exclusive use under claim of right. The shorter seven-year statute under 735 ILCS 5/13-109 applies in limited situations involving payment of taxes under color of title.
Adverse possession is harder to prove than most homeowners assume. Permission negates hostility. Shared use negates exclusivity. Long, undocumented use of a strip is the most common fact pattern — but documentation matters.
Prescriptive easements
A close cousin of adverse possession that grants a use right (a path, a driveway, a utility line) rather than full ownership. The elements overlap — open, notorious, continuous, hostile use for 20 years — but the result is an easement, not title.
Letters between neighbors create evidence. If you’re informally tolerating a neighbor’s use of your land, putting it in writing that the use is permissive defeats any future adverse possession or prescriptive easement claim. Written permission, retained, is one of the most underused tools in real property law.
Quiet title actions
When the dispute can’t be resolved through survey, negotiation, or a recorded agreement, the formal remedy is a quiet title action under the Illinois statute. The court determines who owns what, and the resulting judgment is recorded against the title. It’s expensive and slow — but definitive.
Practical order of operations
- Order a current plat of survey if you don’t have one.
- Talk to the neighbor before escalating. Most disputes resolve here.
- Document permission in writing if you’re tolerating something informally.
- Send a demand letter — through counsel — if the neighbor won’t engage.
- Negotiate a written agreement (boundary line agreement, easement, or settlement).
- File a quiet title action only when negotiation has been exhausted.
VF Law handles boundary disputes at every step — including coordinating with surveyors, drafting written boundary-line agreements, and litigating quiet title actions when they become necessary.
