Why the mix-up is so common
As a licensed professional engineer with over 20 years of experience and a licensed professional land surveyor with 5 years of experience, I can give a perspective from both professions.
Many Maryland homeowners have a drawing of their property somewhere in their closing paperwork, and many believe it is a survey. They bring it to me when planning work on the property and say, "I already had a survey done. Here it is."
It is a real document prepared by a licensed surveyor. The important question is what it was prepared to do.
Who the drawing serves
Maryland's location-drawing standard describes the document as being of benefit to a consumer only insofar as a lender or title insurer requires it for a contemplated transfer, financing, or refinancing. That is why it commonly appears in a closing file.
You may have paid for the drawing at settlement, but its limited purpose is written into the document. It helps the lender or title insurer evaluate certain visible conditions around the transaction. It does not establish the property's boundary for the owner.
What a location drawing provides
Under COMAR 09.13.06.06, the surveyor examines the current deed and the recorded plat, if one exists, and takes enough measurements to prepare the drawing.
The drawing shows significant buildings, structures, and other improvements in approximate relation to the apparent property lines described by the deed. It also states the level of accuracy and notes possible visible encroachments that can reasonably be identified from an inspection.
Those qualifiers matter. The lines are apparent, the relationships are approximate, and the encroachment review is limited to what can be observed. The document should not be treated as a precise map of where ownership begins or ends.
Read the warning printed on the drawing
Maryland's minimum standards require the drawing to state that it is not a boundary survey and cannot be relied upon to show where the property's boundaries are.
The drawing must also say that it is not to be relied upon to establish or locate fences, garages, buildings, or other existing or future improvements, and that it does not accurately identify property boundary lines. That language is not boilerplate to ignore. It tells you exactly where the document stops being useful.
When the drawing may be enough
For the limited transfer, financing, or refinancing purpose described in the location-drawing rule, accurate boundary identification may not be required. Whether a lender or title insurer will accept the document is still a transaction-specific decision.
If your only question is whether the closing parties received the drawing they requested, it may have done its job. If your question is where to build, whether a fence crosses the line, or where a corner lies, it is the wrong product.
Why a boundary survey is different work
A boundary survey is not a more expensive version of a location drawing. Maryland's boundary-survey standard requires research and field investigation aimed at evaluating or establishing property boundaries. That can include recorded and unrecorded documents, physical evidence, and reliable testimony.
This is usually where the misunderstanding becomes expensive. A homeowner planning an addition, garage, fence, or other improvement may assume the closing drawing has already resolved the line. It has not. The local permit office may also require a site plan or other documentation based on the specific project and property.
Maryland's surveying standards contain separate rules for different products; the full Board regulations are useful when you need to confirm which standard applies. The surveyor and the permit office should identify the actual deliverable before work begins.
What to do with the document in your file
Take it out and read its title and warning language. If it contains the limitations required by Maryland's location-drawing rule, do not use it to place an improvement.
Then call the county or municipal permit office and describe the exact project. Ask what plan or survey documentation is required for that address. When you contact a surveyor, describe the decision you need to make rather than asking for "a survey." That gives the professional a much better chance of quoting the right work the first time.