What is a plat map, and how can it benefit you?

Q: Can a plat map settle a boundary dispute with my neighbor?

It can start the conversation but rarely ends it. A plat map shows platted dimensions, not where the pins actually sit in the ground, and older plats may not reflect later lot line adjustments. If a fence, driveway or shed appears to encroach, order a current boundary survey and consult a real estate attorney. Courts weigh survey evidence and the recorded legal description more heavily than the plat alone.

Written by Samantha SheltonNMLS 1647301Updated September 2026

Couple standing at a survey stake on their suburban lot boundary, the kind of property line a plat map records

A plat map is a recorded legal map showing how one larger parcel of land was divided into individual lots, including lot dimensions, street names, easements and rights-of-way. It’s filed with the county register of deeds, the land-records office in each of Michigan’s 83 counties, and it’s a public record, so most buyers view one for $0 and pay only a small per-page fee for a certified copy.

A plat map is not a survey. It shows how the subdivision was platted, not a field-verified measurement of your corners. Reading it before closing is the cheapest way to catch a utility easement, a shared driveway or a setback that would block the fence you were planning.

Learn what a plat map shows, how it differs from a plot map and a boundary survey, and how to pull yours from the county before you close. If you’re earlier in the process, start with our Home Buying guide.

Key takeaways:

A plat map is a recorded subdivision map: It shows 5 things at once, lot lines, dimensions, street layout, easements and rights-of-way, for every lot in the development.
Plat maps are public records: Filed with the county register of deeds in all 83 Michigan counties, most can be viewed for $0 online, with a small fee only for a certified copy.
A plat map is not a boundary survey: It shows the platted design, not field-verified corners, so hire a surveyor for the 3 jobs that need real measurements, a fence, an addition or a boundary dispute.

What is a plat map?

A plat map is a recorded map, prepared by a licensed surveyor and approved by local government, that divides a tract of land into numbered lots and dedicates the streets and easements serving them. Once recorded, it becomes the legal reference every deed in that subdivision points back to. Which is why a legal description there reads like “Lot 47, Sunset Ridge Subdivision” rather than a page of compass bearings.

What a plat map shows

Lot lines and lot numbers: Every lot is outlined and numbered, so you can see which parcel your purchase agreement describes.
Lot dimensions: Frontage and depth print along each boundary, platted figures, not measurements re-verified in your yard.
Streets and rights-of-way: Street names, widths and the public right-of-way, which often extends several feet onto what looks like your lawn.
Easements: Utility, drainage and access strips, usually along a rear or side lot line. You own that ground; someone else may use it.
Notes and dedications: The surveyor’s certificate, recording data, and notes on setbacks, drainage or private road maintenance.

Types of plat maps

Subdivision plat: The original map dividing a tract into lots, blocks and streets. Most buyers need this one.
Amended plat or replat: A later map changing the original, a lot line adjustment, a vacated street, a corrected dimension.
Short plat: A small division, typically a handful of lots, where a full plat isn’t required.

Always ask whether an amended plat was recorded later; it controls over the original for whatever it changed.

Plat map vs. plot map vs. boundary survey

These three get used interchangeably and shouldn’t be. The plat map is free and neighborhood-wide, the plot map is a single-parcel sketch, and the survey is the only one where a licensed surveyor physically located your corners.¹

Feature	Plat map	Plot map	Boundary survey
What it shows	Every lot in a subdivision: lines, dimensions, streets, easements	One parcel and its structures, to scale	Field-measured corners and encroachments
Who creates it	A surveyor for the developer; approved, then recorded	An assessor, engineer or drafter; often not recorded	A licensed surveyor you hire
Where it lives	County register of deeds and most county portals	The county assessor’s parcel viewer	Delivered to you; sometimes recorded
Cost to you	$0 online; small per-page fee to certify	Usually $0	The one paid item here; quoted per parcel
What it settles	How the subdivision was laid out and dedicated	Informational only; not a boundary determination	Evidence relied on when a boundary is in question

The distinction reaches the title table. Most residential owner’s title policies are issued without a current survey and take exception to matters a survey would reveal, see title insurance and why it’s important. The American Land Title Association, representing title insurers and agents since 1907, publishes the American Land Title Association’s title and conveyance resources, including the ALTA/NSPS Land Title Survey standards.

Why home buyers should read the plat before closing

The plat is the one free document that can change your offer. Four things it routinely catches:

A fence in the wrong place: Platted lot lines rarely match where a previous owner set the fence, and buyers who build to the fence move it later at their own cost.
A rear utility easement: Strips several feet deep are common. You own that ground and pay taxes on it, but generally can’t build anything permanent there.
A shared driveway or private road: When access crosses another lot, the plat shows the easement and the notes may point to a maintenance agreement.
Setbacks that shrink the buildable area: Check the plat notes against local zoning regulations before planning an addition.

One caution: a plat shows layout and dedicated rights, not who holds a financial claim. Mortgages, tax liens and contractor claims surface in the title search instead, see property liens for how those clear. Flood risk is separate again: FEMA’s Flood Map Service Center is the official public source for National Flood Insurance Program flood hazard information, searchable free by address. Buildable area and easement burden also feed resale, covered in our guide to the impact of zoning laws on home value.

How to get a plat map in 4 steps

Work these in order and most buyers never reach step 4. The first 3 cost between $0 and a few dollars.

1. Search the county land-records portal ($0)

Most counties publish recorded documents, parcel maps or both online, searchable by address, parcel number or subdivision name. Viewing and printing a plat image typically costs nothing.

2. Order a certified copy (small per-page fee)

If you need the county’s certification for a permit, a lender file or an attorney, the register of deeds will produce one for a per-page fee. Plats are oversized sheets, so ask the plat-page rate first.

3. Ask your title company during the search ($0 to you)

The recorded plat is standard material in a title examination and is often included in the closing package. Ask early, not at the signing table, our guide to choosing a title company covers what the search should produce.

4. Hire a licensed surveyor (paid)

Unplatted acreage has no subdivision plat because it was never platted. In that case, or when a fence, an addition or a dispute demands field-verified corners, a surveyor is the answer, and the only step with a real price tag. The CFPB’s home-buying tools and resources cover the rest of the closing paperwork.

How to read a plat map

A plat looks technical and reads in about 10 minutes once you know the order to take it in.

Start with the legend and scale: Symbols for easements, monuments and right-of-way vary by surveyor and era; the scale tells you what an inch represents.
Locate your lot number: Match the lot and block number in your legal description to the map, not the street address.
Trace the easements: Follow every dashed or hatched line touching your lot to its label, and note how deep each strip runs.
Check the dimensions: Read frontage and depth against what the listing claimed. Corner and irregular lots are where the two most often disagree.
Read the marginal notes: Setbacks, drainage requirements and private road language live in the margins, the most-skipped, most-useful part of the sheet.

If the plat contradicts what you were told, raise it before the inspection deadline, the point in the home buying process where a question still costs nothing.

What Michigan buyers should know about plats

Michigan keeps recorded plats at the county level, and there are 83 registers of deeds, one per county. The plat for a Waterford subdivision lives with Oakland County, not the township and not the state.

Search the county first, at $0: Most Michigan registers of deeds publish land records or a parcel GIS viewer online where the plat image is free. Counties without an online index retrieve it at the counter.
Ask the plat-page rate before you drive over: Copy and certification fees are set under Michigan law and administered county by county, and a plat is an oversized sheet, so its rate can differ from a deed page.²
Splitting or re-platting runs through the municipality: Michigan’s Land Division Act governs how land is divided and re-platted here, and approval generally starts with the township, city or village. Confirm any split with the municipality and a real estate attorney before you write the offer.
Know which description you’re reading: Michigan was originally surveyed under the federal Public Land Survey System, so unplatted parcels are described by section, township and range, while platted lots use the plat name plus the liber and page where the plat was recorded.

Now that you know where to find the plat, here are the questions buyers ask most.

FAQ: Plat maps for home buyers

Here are answers to common questions about plat maps.

Is a plat map the same as a property survey?

No. A plat map is a recorded map showing how a subdivision was divided into lots, with platted dimensions and easements. A survey is a field measurement by a licensed surveyor who physically locates and marks your corners. Use the plat for a free first look, and order a survey when you need defensible corners for a fence, an addition or a boundary dispute. Your title insurance policy treats survey matters separately from the plat.

Where do I get a plat map for my property?

Start with the county register of deeds or recorder’s office, which holds the recorded plat for every platted subdivision. Many counties publish plats through a free online GIS or land records portal. Your title company can also pull it during the title search, and it’s often in the closing package, one more reason choosing a title company that answers questions matters.

How much does a plat map cost?

Viewing a plat map is usually free through a county land records portal or in person at the register of deeds. Certified or oversized copies carry a small per-page fee set by the county. A new survey is the expensive option, not the plat. If you only need easements, dimensions and street layout before making an offer, the free copy is enough, and it fits early in the home buying process.

Can a plat map settle a boundary dispute with my neighbor?

It can start the conversation but rarely ends it. A plat shows platted dimensions, not where the pins actually sit, and older plats may not reflect later lot line adjustments. If a fence, driveway or shed appears to encroach, order a current boundary survey and consult a real estate attorney. Encroachments cloud title much the way property liens do, and courts weigh survey evidence more heavily than the plat alone.

The bottom line on plat maps

A plat map is a recorded legal map showing how a larger parcel was divided into individual lots, lot lines, dimensions, street layout, easements and rights-of-way for the whole subdivision. It’s a public record at the county register of deeds, so in most of Michigan’s 83 counties you can view yours for $0 and pay only a small per-page fee for a certified copy. Don’t mistake it for a survey: it shows the platted design, not field-verified corners, so a fence, an addition or a boundary dispute still calls for a licensed surveyor. Realtor.com offers a plain-English walkthrough of what appears on a plat map.

If you’re ready to buy in a platted subdivision, talk to Align Lending, we’ll shop your scenario across our lender network and show you the numbers side by side. Call 248-506-5727 or start online today.

Footnotes:

1. Boundary determinations, easement rights and the legal effect of recorded plats and surveys are governed by state law and vary by property. Consult a licensed surveyor and a real estate attorney about a specific boundary or easement question. Return to text.

2. Register of deeds copy, certification and recording fees in Michigan are set under state law, administered by each county, and change over time. Confirm current plat-sheet rates with the county before ordering. Return to text.

Sources: ALTA founded 1907, and the ALTA/NSPS Land Title Survey standards developed with the National Society of Professional Surveyors, American Land Title Association. Flood Map Service Center as the official public source of National Flood Insurance Program flood hazard information, searchable free by address, Federal Emergency Management Agency. Home-buying and closing-form guidance, Consumer Financial Protection Bureau.

This article is for informational purposes only and is not legal, financial, or tax advice. Plat maps, surveys, legal descriptions, easements and land division rules are governed by state and local law and should be reviewed by a licensed surveyor or attorney in your state. Align Lending is an independent Michigan mortgage broker, NMLS #2041154.