Property ownership glossary

An encroachment is a physical intrusion across a property boundary

A fence, garage, roof, driveway, or tree improvement can cross the line. That physical fact does not automatically create a legal right to remain.

Last updated: August 1, 2026

Encroachment: definition first

Direct answer: An encroachment is an unauthorized physical intrusion of a structure, improvement, or object onto, over, or under another person's land. It can affect use, value, marketability, financing, and title review. A survey can locate the improvement relative to the legal boundary, but the survey alone does not create an easement, transfer title, or select the legal remedy.

Why it is on the exam: PSI expressly tests encroachments and their effects on title, value, and use in Property Ownership. The disclosure outline also identifies conditions that may warrant a survey, so a single question can connect boundary discovery, buyer investigation, and an ownership remedy.

Nature

Physical boundary intrusion

Common evidence

Survey and title records

Automatic right

Possible effect

Use, value, title, or closing

Separate an intrusion from a granted use right

Decision point	Encroachment	Easement
Starting point	Physical object crosses a boundary without established authority	Legal right permits defined use of another's land
Proof	Survey, inspection, boundary evidence, and history	Grant, reservation, implication, necessity, prescription, or other valid creation
Right to continue	Not automatic	Exists within the easement's scope until valid termination
Example	Garage wall built two feet over the line	Recorded right to cross a ten-foot driveway strip

Use a survey to locate the problem, not decide the lawsuit

A boundary survey relates the legal description and monument evidence to conditions on the ground. It may show that a fence, wall, eave, driveway, or other improvement lies outside the record boundary. That is vital factual evidence for the parties and title professionals.

Legal ownership and remedies can still depend on deeds, plats, earlier surveys, agreements, acquiescence, limitations periods, adverse possession, prescriptive easements, and state law. The exam usually asks for the sensible next step or the classification, not a final judicial outcome from one measurement.

Identify the record boundary and the object crossing it.
Determine whether permission or an easement already exists.
Ask how long the condition has existed and whether it was disputed.
Distinguish a physical fact from the legal right or remedy.

Match the response to the transaction and the parties

Possible resolutions include removing or relocating the improvement, granting an easement or license, recording a boundary or maintenance agreement, adjusting the conveyance, obtaining title treatment, negotiating compensation, or seeking a court determination. The correct route depends on ownership, lender, title, zoning, and practical facts.

A broker should not promise that a fence is harmless or announce who owns disputed land. The prudent role is to disclose known material information as required, avoid unauthorized legal conclusions, and recommend the appropriate survey, title, and legal review.

Connect long encroachment to the correct doctrine

An encroachment that continues for the required period can be relevant to adverse possession or a prescriptive easement. Adverse possession seeks title to land. Prescription seeks a use right. The physical pattern and the claimant's conduct determine which theory the facts suggest.

Long duration does not automatically win either claim. Permission can defeat the adverse element, and every jurisdiction requires specific proof. On an Illinois-specific question, use the current Illinois limitation statutes and cases rather than a generic national period.

The garage discovered before closing

Question: A buyer's survey shows that the seller's detached garage extends eighteen inches onto the neighbor's lot. No recorded easement or agreement appears. What is the best immediate classification?

Best answer: The garage creates an apparent encroachment that requires further title and legal resolution.

Why: The physical structure crosses the surveyed boundary, and no existing right explains it. The survey supports the location fact, but it does not by itself establish adverse possession, permission, removal, or ownership of the strip.

Lock in the distinction

Exam trap

Do not say a long-standing fence automatically moves the deed line. Duration can support a claim, but adverse possession, prescription, agreed boundaries, and record title each require their own facts.

Memory cue

Encroachment is the object over the line. Easement is the right across the line. Survey shows where; law decides what follows.

Quick questions

Is an encroachment an easement?

No. An encroachment is a physical intrusion. An easement is a legal use right. The parties might later create an easement to resolve an encroachment.

Does a survey prove ownership?

A survey supplies important boundary and location evidence. Deeds, plats, agreements, possession history, title records, and law still determine the legal rights.

Can an encroachment affect marketability?

Yes. A material or disputed encroachment can affect use, value, lender approval, title insurance, and a buyer's willingness to close.

Can an encroachment lead to adverse possession?

It can supply facts for a claim if every required element continues for the statutory period. The encroachment alone does not establish title.

Primary sources and review status

Checked through August 1, 2026. This definition is an exam-prep explanation, not a substitute for current law or advice about a live dispute. The current official source controls if the outline or Illinois rule changes.