Missouri Survey Guide

Missouri Land Surveying Law: What Requires a Professional Surveyor

Updated September 2, 2026 · 3 min read · State Surveying Laws

Quick answer

Missouri reserves boundary retracement, corner monumentation, parcel descriptions, subdivision surveying, and easement location to professional land surveying. County parcel maps cannot substitute for that work. Verify the surveyor, state the property decision, and ask whether the final scope includes monuments, a signed plat, and any required filing.

The statute defines the work, not a list of project names

RSMo 327.272 defines professional land surveying by the judgment involved. It includes determining or retracing real-property boundaries and United States Public Land Survey System positions, monumenting corners, subdividing land, preparing property descriptions, locating easements and rights-of-way, and preparing boundary drawings.

For a homeowner, the line is practical. Looking up a parcel, reading a deed, or measuring for preliminary planning is research. RSMo 327.272 places boundary determination, corner monumentation, and property descriptions within a Missouri professional land surveyor's work.

Missouri's PLSS and survey repository change the records search

The Missouri Land Survey Program maintains public-land corner information and a statewide repository of about two million digitized survey documents. That record system can matter more to a boundary retracement than a current tax map, particularly for rural land described by section, township, and range.

Missouri also removes ambiguity about cadastral maps. 2 CSR 90-65.080 requires a warning that these maps are informational and cannot be used for conveyance or establishing property boundaries.

Three rules to address in the estimate

Three rules to address in the estimate
RuleWhat to ask
Professional scopeWho is the Missouri PLS in responsible charge and what will be signed or sealed?
Survey recordsWill the firm search the Land Survey Index, county records, and relevant corner documents?
Necessary accessWill adjoining land need to be entered, and how will notice and property protection be handled?

RSMo 327.371 gives a professional land surveyor a limited trespass exemption when entry is necessary to make a survey and makes the surveyor liable for actual damage. It does not give a homeowner permission to enter a neighbor's property or resolve a dispute.

Use the law to choose the right deliverable

For a fence, ask whether the boundary and the construction side will be staked. For a deed split, ask what description, plat, county review, and recording work are included. For a neighbor conflict, request a survey focused on the disputed line and keep ownership-law questions for an attorney.

Verify before hiring

Check the person and firm through the Missouri board's online search. A current license is a threshold check, not a guarantee of price, schedule, or fit. Use the Missouri land surveyor directory to locate firms, then compare written scopes.

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Frequently Asked Questions

What work is professional land surveying in Missouri?

Missouri Revised Statutes 327.272 includes locating or retracing boundaries and PLSS positions, monumenting corners, subdividing land, preparing property descriptions, and locating rights-of-way and easements.

Can a Missouri parcel map establish my boundary?

No. Missouri's cadastral-map rule requires a disclaimer that the map is informational, is not a property boundary survey, and cannot be used for conveyance or establishing boundaries.

May a Missouri surveyor enter neighboring land?

Missouri Revised Statutes 327.371 provides a limited trespass exemption when entry is necessary to perform a survey, while leaving the surveyor liable for actual damages. Discuss access and notice with the surveyor; this guide is not legal advice.