Before a licensed land surveyor sets foot on your property, a lot of paperwork gets checked first. Deeds, maps, old survey records, and county files all play a part. Each one gives clues about where your property lines really sit. Skip this step, and a survey could miss key facts about the land’s history. In this post, we’ll walk through the main documents a surveyor reviews before the fieldwork even starts, and why each one matters.

Current Deed and Legal Property Description

The deed is usually the first stop. It holds the legal description of your property, the words that spell out exactly what land you own. A surveyor reads this closely, looking for distances, directions, and points called “calls” that describe how far the boundary runs and in which direction it turns.

The deed also names the monuments used to mark corners. These might be iron pins, concrete markers, or even natural features like a tree or a creek bend. Old deeds sometimes reference neighbors by name too, which can help confirm how the parcel connects to the land around it. If the wording is vague or outdated, that’s often the first sign a boundary dispute could be brewing.

Recorded Plats and Subdivision Maps

If your property sits inside a subdivision, a recorded plat is next on the list. These maps show the original layout of the neighborhood: lot sizes, street widths, easements, and any land set aside for parks or utilities.

Plats also mark where the original monuments were placed when the subdivision was first surveyed. A surveyor compares these historical points to what still exists on the ground today. Sometimes a pin has shifted, or it’s buried under decades of dirt and grass. The plat gives a starting point for tracking it down. Without this map, reconstructing the original lot lines would be guesswork.

Previous Surveys and Boundary Records

Old survey drawings and field notes carry weight, but not blind trust. A surveyor treats a previous survey as one piece of evidence among several, not the final word. Corner records and monument documentation from earlier work can save time and confirm where past surveyors set their marks.

That said, mistakes happen. Equipment changes, records get lost, and sometimes an old survey simply got it wrong. So a licensed land surveyor cross-checks past findings against the deed, the plat, and physical evidence still visible on the property. If everything lines up, great. If it doesn’t, the surveyor digs deeper to figure out why.

Deeds and Records for Adjoining Properties

Your boundary line isn’t just yours. It’s shared with the neighbor on the other side, and their deed describes that same line too, sometimes in different words. A surveyor pulls these adjoining records to compare descriptions side by side.

This step often reveals problems that wouldn’t show up otherwise. Maybe one deed describes a boundary that’s ten feet off from what the neighboring deed claims. Maybe there’s a gap between two parcels that nobody noticed for years. Catching these overlaps or gaps early saves everyone a headache down the road, especially if a fence or building sits close to the line.

County, Municipal, and Right-of-Way Records

Public records round out the picture. Assessor files, GIS parcel maps, road records, and annexation documents all get checked too. These sources can show how a property has changed over time, whether through a road widening project, a boundary adjustment, or a shift in city limits.

Here’s the catch: online parcel maps and GIS data are handy for a quick reference, but they don’t replace an actual survey. These tools are built for tax purposes, not for pinpointing exact legal boundaries. A surveyor uses them as one more clue, then confirms everything with field measurements and the recorded documents already on file.

Frequently Asked Questions

What documents should I give the land surveyor?

Hand over your current deed, title documents, any previous surveys, and recorded plats you have on hand. Don’t worry if your file is incomplete. The surveyor can pull additional public records when needed.

Can a surveyor begin without an old property survey?

Yes, and it happens often. A previous survey helps, but it isn’t required. The surveyor can build a full picture from deeds, plats, public records, and physical evidence found on the property itself.

Are county GIS maps accurate enough for a land survey?

No. GIS and assessor maps exist mainly for reference and tax purposes. They can be off by several feet in either direction, so they shouldn’t be treated as proof of where a boundary actually sits.

Why does a surveyor review neighboring property records?

Because a shared boundary line is described in more than one deed. Checking both versions side by side helps the surveyor spot inconsistencies and figure out how the two descriptions actually fit together on the ground.

What happens when property documents conflict?

The surveyor weighs everything: the recorded documents, field evidence, monuments still in place, fresh measurements, and standard surveying principles. From there, a professional boundary opinion takes shape, one grounded in evidence rather than a single source.