A recorded plat shows how land was divided on the day it was subdivided. It carries lot lines with bearings and distances, lot and block numbers, the streets, the easements, and the signatures that approved it. It does not show where your corners sit today, who owns the lot now, what the zoning allows, or whether the ground will take a septic system. Those need a survey, a title search, and a permit.
A Plat Is a Subdivision Map Recorded Like a Deed
A plat is a drawing of land divided into lots. Alabama law has asked for one for over a century. Section 35-2-50 says an owner who subdivides must have the land surveyed by a competent surveyor, if it has not been surveyed already. The plat must give "the length and bearings of the boundaries of each lot and its number."
For town lots it must also show the streets, alleys, and public grounds, plus the number of each lot and block. It has to tie the land to the government survey, the grid of sections, townships, and ranges that every Alabama legal description hangs on.
Section 35-2-51 covers what comes next. The surveyor certifies the plat. The owner signs and acknowledges it the way a deed is acknowledged. Then it is recorded with the judge of probate in the county where the land sits. Certified copies can be used in evidence "to the same extent and with like effect as in the case of deeds."
That is why the plat deserves a careful read. Your deed may describe the land as a lot number in a named subdivision, followed by a book and page. If it does, the plat is part of your legal description.
Pull the Recorded Sheet and Read the Numbers First
A plat is often the first paper a buyer is handed. It is rarely the last one they need.
Start by getting the right copy. A seller or agent may hand you a photocopy. It can be a preliminary sketch that never got recorded, or an older version that was later revised. Pull the recorded sheet yourself, from the probate office. In Shelby County, plats are recorded with the Judge of Probate, and the office links its recording room records search from its recording page.
Then read these, in this order.
- Book and page. Usually in the title block or a corner. It is how the plat is indexed, and how your deed points to it.
- Lot and block numbers. Match them to the deed. One wrong digit describes somebody else's land.
- Lot lines. Each line carries a bearing, such as N 45°12'30" E, and a length in feet. The bearing is the line's direction measured off north or south. Check that the shape on paper looks like the ground you walked.
- Corner markers. Many plats note the iron pins or other monuments set at the corners. A later surveyor goes looking for those first.
Then Read Everything That Crosses or Limits the Lot
Rights-of-way. The road sits inside a strip of land, and the plat shows its width. Your lot line often stops at the edge of that strip. The strip can run well back from the pavement, so the grass you planned to fence may belong to the road.
Easements. Utility and drainage easements are often drawn along the back and side lines, labeled with a width like 10 or 20 feet. A recorded easement binds the buyer. Building a shop or a pool on one is a bad bet, and a drainage easement may carry water across the yard in every hard rain. For how easements and access work in general, see what an easement on a tract means for you.
Building setback lines. Where they are shown, a dashed line marks how close a building may sit to the front line, and sometimes the sides. Zoning can ask for more than the plat shows, and zoning changes. Confirm the current setbacks with the city or county before you place the house. They tend to decide where the house can sit and which way it faces.
Flood notes. Some plats carry a note naming the FEMA flood zone and the map panel in effect when the plat was drawn. FEMA revises its maps, so that note can be out of date. Pull the current map from FEMA's Flood Map Service Center.
Zones that begin with A or V are special flood hazard areas, where a federally backed mortgage comes with mandatory flood insurance. Zone X means minimal mapped risk, and any lot can still flood. The full walk-through is in reading a flood zone on Alabama land.
The Signatures Tell You Who Stood Behind the Drawing
The surveyor's certificate and seal. Alabama's licensing board for engineers and surveyors sets the rule in its 2025 law and administrative code. Rule 330-X-11-.03 says each plat sheet for land surveying "shall be signed, sealed, and dated" by the licensee who prepared it or under whose responsible charge it was prepared. No seal and no signature means no licensed surveyor has put a name on it.
Approval signatures. Section 35-2-52 covers cities of more than 10,000 people and their police jurisdictions. There, the probate judge must refuse a plat showing streets unless it notes approval from the city's governing body or city engineer. Municipal planning commissions regulate subdivisions in their planning jurisdiction under Section 11-52-30.
Out in the county, Section 11-24-1 lets the county commission regulate lot sizes, streets, drainage, and utility placement.
If you expect an approval block and it is empty, ask why.
Dedication language. This is the owner's statement giving streets and other areas to the public. Section 35-2-51 treats recording as a conveyance of whatever the plat marks as donated to the public. Streets and commons are held "in trust" for their stated use.
Whether a county will maintain that road is its own decision. Section 11-52-30 bars a county from accepting certain subdivision roads for maintenance until the county engineer certifies they meet county standards. Ask the county engineer or the city whether your road is on the maintained list.
Four Questions the Plat Was Never Meant to Answer
A plat records lines as they were laid out on the day it was drawn. It has no way to show what happened next.
- Where are the corners today? Pins get knocked out by graders. Fences go up in the wrong place. A neighbor's driveway creeps two feet over. None of that appears on a plat filed years ago.
- Who owns it, and what is recorded against it? The plat says nothing about the current owner, a mortgage, a lien, or an easement granted later in a separate document. An attorney's title search finds those.
- Does zoning allow what you want? A lot on a recorded plat can still be zoned against a second house, a business run out of a shop, or livestock. Check with the city or county.
- Will the ground perk? A platted lot has no septic approval built in. The county health department issues a septic permit after a soil evaluation on the actual lot. That process is covered in what "the ground won't perk" means.
The County Map Is a Drawing Built From Other Drawings
The parcel lines on the county's tax map are drawn by the county from deeds and plats so it can assess property. They are built for taxes. They can sit off from the fence line or the pins, and they do not settle where a boundary is.
LandScout's parcel outlines come from the county assessor's GIS, so they carry the same limits. They are good for screening a tract before you ever get in the truck, which is what the parcel view is for. LandScout tracks 16,727 undeveloped parcels in Shelby County, according to the Shelby County numbers. Every one of those outlines came from the county's drawing. None of them is a survey.
When You Should Order a New Boundary Survey
The recorded subdivision plat and the survey a surveyor hands you are different papers. The recorded plat covers the whole subdivision as it was approved and filed. A boundary survey is a fresh retrace of your lot alone. Alabama law counts "retracing property lines or boundaries of any tract of land" as land surveying, which is licensed work under the same 2025 law and code.
The surveyor finds or resets the corners and draws what is on the ground now. That means fences, drives, buildings, and anything crossing the line. That drawing, sometimes called a survey plat, is made for you and may never be recorded.
Order one when any of these is true:
- The tract is not a lot in a recorded subdivision, and the deed describes it in metes and bounds.
- You plan to split the land or sell part of it.
- You cannot find the corner pins.
- A fence, a driveway, or a building sits near the line.
- You plan to build close to a setback or an easement.
- Your lender or title insurer asks for one.
You can see what a parcel file holds, and what each plan includes, on the pricing page.
Read the recorded plat to learn what was promised on paper, and pay a surveyor to tell you what is true on the ground.