How to Write a Boundary Survey Report That Holds Up

Consider this scenario: you finish a boundary survey, sign and seal the plat or survey drawing, and move on. Two years later, a title or boundary dispute results in litigation or lands in court. The opposing expert witness calls your work into question, not because your measurements were wrong, but because the report doesn’t explain if you discovered the issue at hand and, if so, why you resolved a conflict the way you did.

A defensible boundary opinion requires more than just accurate and precise measurements. It requires a clear record of your analysis: what you researched, what evidence you found, how you evaluated conflicting information, what rules of boundary reconstruction you utilized along with applicable statutes, and why you reached your conclusion.

If your reasoning isn’t documented, another surveyor, attorney, or judge will have no way to follow it. They aren’t clairvoyant, after all.

Surveyors adhere to a time-honored tradition: “follow the footsteps of the original surveyor.” A well-constructed written report lets others understand your logic so they can follow your footsteps from start to finish without having to call you to explain it. Here’s what to include so that your professional opinion on the boundary location is clear, supportable, and defensible.

Related reading: A defensible survey report starts with a sound boundary analysis. Read How Land Surveyors Help Resolve Boundary Disputes.

Start with the Research Record

Before a single field crew member sets foot on the property, your report should document what research you conducted and what records you reviewed. This section lays the foundation for every conclusion that follows.

At minimum, document:

• The current deed(s) of record for the subject parcel, including book and page or instrument number*
• Adjoining deeds you reviewed and how far back you traced the chain of title
• Plats, subdivision maps, and recorded instruments affecting the parcel (easements, vacations, dedications)
• GLO field notes or other original survey records if the parcel falls within Public Land Survey System (PLSS) areas (this is a good idea regardless of where the property lies)
• Tax maps, assessor records, or GIS data reviewed (and a note on their limitations)
• Any prior surveys you located and examined, both for the subject tract and adjoiners
• Right-of-way maps for any adjoining roads

* It is a personal preference of mine, but I always pull the previous deed in the chain of title for any property I survey and compare it to the current deed. On more than one occasion, I have found an error in the current deed that did not match the previous deed. Comparing the two to the facts on the ground has often solved a discrepancy before it became an issue.

If a conflicting description surfaces later, your documented research record shows exactly what information was and wasn’t available to you at the time. That context can be critical if your work is ever challenged.

Document What You Found in the Field

Field evidence is the backbone of any boundary opinion, and your report should capture it with enough detail that another surveyor could retrace your steps.

For each monument found, describe:

• Type (iron pipe, concrete monument, rebar, stone, etc.)
• Condition (found in place, disturbed, bent, offset)
• Location relative to the description call
• Whether it was accepted or rejected, and why
• Any surrounding conditions that may affect the location. For example, a tree growing next to a monument can shift its position, or a newly constructed fence may have impacted the monument.

“Found 0.5-inch iron pipe, disturbed, approximately 0.4 feet south of computed corner position; rejected as controlling monument due to evidence of disturbance; position established from proportionate measurement between acceptable original monuments” is far more useful than “found iron pipe, set nail.”

Paper is cheap, time is expensive, and fresh memories are best, so write your report as you go. Don’t wait until two weeks or a month after you complete the project. Trying to remember what you did and why three years later is a nightmare guaranteed to give you serious heartburn.

Also document what you didn’t find. If a deed calls for a stone monument and there’s no evidence of one, say so. The absence of expected evidence can be meaningful to the analysis, so it should be documented in the report.

With the advent of digital photography and nearly every cellular telephone or data collector having a camera, photographs are among the best pieces of evidence you can have. Photographs of recovered monuments, along with search areas for those not recovered, provide irrefutable visual evidence to support your narrative.

Address Conflicts Directly and Explain How You Resolved Them

Conflicts between deed calls, record plats, and physical evidence are common and deserve direct discussion in the report. Leaving them unaddressed, or burying them in a note field, creates real vulnerability and does a disservice to your client.

For each material conflict, your report should identify:

1. What the conflict is – For example, a deed distance that doesn’t match the distance between found monuments, or a bearings conflict between the subject deed and an adjoiner’s deed**
2. The sources involved – Which instruments are in conflict and how they differ
3. How you resolved it – What evidence you gave priority to, and the legal or professional basis for that priority

** Always consider the equipment and standards used at the time the description or survey was prepared. Is the discrepancy within the tolerance of those standards? We can measure much more precisely now than just a few years ago. Ask yourself whether it is truly a conflict or simply the result of improved technology.

While the hierarchy of calls (senior rights, monuments, lines, distances, and area, though application varies by jurisdiction) is a cornerstone of boundary law, applying it still requires professional judgment and depends on the facts of each case.

When you exercise professional judgment to depart from a strict application of the hierarchy, explain that judgment. “The found stone monuments, consistent with original survey records, were given controlling weight over the record distance” provides far more useful support for your conclusion than simply noting that monuments were used.

A useful self-check: if you can state the conflict, the evidence you weighed, and your resolution in two clear sentences, you can write it in the report. If you can’t articulate it that concisely, it’s worth revisiting your analysis before putting it in writing.

As previously stated, “paper is cheap,” so if a more detailed explanation is called for, do so. Be concise but also complete.

Cover Adjoiner Relationships and Their Impact

Every parcel exists within a larger network of adjoining properties, and your report should reflect those relationships.

For each shared line where the adjoiner relationship is relevant, document:

• Which adjoiner deed(s) you reviewed
• How the adjoiner’s description relates to the subject description (junior/senior, same grantor, simultaneous conveyance, etc.)
• Whether the adjoiner’s calls are consistent with your established line
• Any evidence from adjoiner parcels (monuments set by prior surveyors, fences, occupation) that you considered

When adjoiner deeds and the subject deed were conveyed from a common grantor, the relationship matters to the boundary analysis. When one parcel is senior to another, that affects whose calls control along a shared line. These relationships belong in writing, not just in your field notes or in your head.

If your established line differs from a fence line or long-standing occupation boundary, address it. Note the discrepancy, document the location of the occupation evidence, and state whether adverse possession or boundary by acquiescence might be relevant.

While questions of adverse possession or boundary by acquiescence may ultimately require legal review, your report should document the observed conditions and note their potential relevance.

State Your Opinion Clearly, Then Show the Work

Ultimately, the report should clearly state your professional opinion regarding the location of the boundary.

For example: “It is my professional opinion that the northeast corner of the subject parcel is located at the point occupied by the found concrete monument, as shown on the plat, being consistent with the original recorded subdivision plat and the senior adjoiner deed.”

From there, the rest of the report should make that opinion fully traceable. A reader who works through your research documentation, field evidence, conflict analysis, and adjoiner notes should arrive at the same conclusion, or at least understand how a competent surveyor arrived at it.

Reports that hold up well in litigation share a common trait: clear reasoning supported by documented professional judgment and facts. Problems often arise when key decisions and supporting analysis were never documented, even when the underlying work was sound.

Retain Supporting Records

The survey report itself isn’t the only document that matters. Your field notes, research records, chain of title analysis, and calculation files are the raw material behind your conclusions. Retention requirements vary by state, so check your jurisdiction’s rules for specific timeframes, but as a baseline:

• Retain original field notes or digital equivalents (data collector files, point clouds, digital field books) for the full record retention period required by your state board.
• Keep physical copies of deed and plat research in the project file and maintain a digital backup stored offsite as insurance against loss.
• Document your calculations and any software outputs that informed your monument positions.
• Store records in a format that remains accessible over time. Proprietary file formats can become unreadable as software evolves, so consider exporting to a stable format such as PDF alongside native files.

If your report ever needs to be defended, these records are what allow you to walk someone through your reasoning step by step. A report without supporting documentation is a conclusion without a trail.

The Standard: Write It So Another Surveyor Can Retrace It

One useful standard for evaluating your own reports: could a competent, licensed surveyor, working from your report alone, understand what you found, what you considered, and why you concluded what you did without having to call you?

A clear, complete record of the reasoning behind the boundary opinion is the standard. The goal isn’t to document every minor detail, but to ensure the basis for your conclusions can be understood and retraced.

A survey report built to that standard protects your clients, supports future surveyors who may rely on your work, and reflects the level of professional care the field requires.

It is a sad but irrefutable fact that licensed surveyors are an aging population. In many states, the average age of licensees is at or near retirement age. The fact is that you may not be around to defend your work should it ever come into question. Your survey report will have to speak for you.

So, make sure your lifetime of work is documented in a way that reflects your professionalism and dedication to your craft.

Keep Your Skills Current with McKissock Learning

Documenting boundary opinions clearly and defensibly is a professional skill that develops over time and benefits from ongoing education. McKissock Learning offers continuing education courses specifically for licensed land surveyors, covering topics such as boundary law, legal descriptions, standards of practice, and professional ethics.

Whether you’re working toward license renewal or looking to sharpen a specific area of practice, McKissock’s online courses are built around the real-world demands of professional land surveying.

Explore McKissock’s Land Surveyor continuing education and find the right courses for your next renewal cycle.