What Is an FMB Sketch?
FMB stands for Field Measurement Book — a register maintained by the Tamil Nadu Survey and Settlement Department that contains ground-level measurements of every land parcel in a village or town. The FMB Sketch is the visual, scaled output drawn from those measurements.
Prepared at scales of 1:1000 or 1:2000, each FMB Sketch shows the actual shape and orientation of the land parcel, with precise boundary lines marked on all four sides. It identifies the survey number, sub-division number, adjacent survey numbers, and nearby physical features such as roads, watercourses, and bunds.
In practice, the FMB is the land's fingerprint. Two plots might share the same village or taluk, but the FMB Sketch makes each uniquely identifiable. It forms the base layer of Tamil Nadu land records, and no property transaction or legal proceeding involving land should proceed without it being verified.
Download Your FMB Sketch in Minutes — Fast, Simple and Reliable
Getting your FMB Sketch through mypatta is quick and hassle-free:
- Visit mypatta and select FMB Sketch from the available property documents.
- Enter the required details, such as District, Taluk, Village, Survey Number, and Subdivision Number.
- Complete the request and proceed with the payment.
- Once the record is verified, your FMB Sketch will be delivered digitally.
- Download, save, or share the document for property verification, boundary checks, or legal purposes.
With mypatta, property owners, buyers, and professionals can access FMB Sketch records without visiting government offices or navigating multiple portals.
Why Is an FMB Sketch Important for Property Verification?
- Boundary VerificationAn FMB Sketch clearly shows a property's boundaries, helping prevent encroachment and ownership disputes.
- Survey Measurements and Extent ConfirmationIt provides the land's shape and dimensions, making it easier to verify survey details and property extent.
- Property Disputes and Legal ProceedingsFMB Sketches are commonly used as supporting evidence in boundary and ownership-related disputes.
- Land Transactions and RegistrationThey help buyers, sellers, and lenders verify property details before registration or loan approval.
- Construction and DTCP ApprovalsPlanning authorities often use FMB Sketches to verify plot dimensions for building and layout approvals.
Key Details Found in an FMB Sketch
A standard FMB Sketch extract contains the following information:
| Detail | What It Shows |
|---|
| Survey Number | Unique identifier for the land parcel in the village/taluk revenue system. |
| Sub-Division Number | Identifies a specific partition within a survey number, critical for subdivided plots. |
| Land Dimensions | Length and width measurements of the parcel at each boundary, drawn to scale (typically 1:1000 or 1:2000). |
| Boundary Markings | North, south, east, and west boundaries, including natural features like water bodies, roads, and bunds. |
| Adjacent Plot References | Survey numbers of neighbouring land parcels, helping identify precise location on the ground. |
| Parcel Shape and Orientation | The actual geometric form of the land — irregular shapes, corners, and offsets are recorded visually. |
| Subdivision Context | Parent survey details and how the current parcel relates to original survey divisions. |
| Field Notes / Ladder Data | Raw measurement data from field survey that underpins the sketch drawing. |
Who Can Access or Use an FMB Sketch?
FMB Sketch is a public land record , accessible to anyone. However, the following groups actively use it for specific purposes:
•Property Owners: To verify that the current FMB on record accurately reflects the land's boundaries and dimensions, particularly after subdivision or partition.
•Property Buyers: To confirm the land's physical shape and size before finalizing a purchase , ensuring no encroachment, incorrect boundary, or undisclosed subdivision exists.
•Legal Heirs and Co-owners: To establish the precise extent of land being inherited or divided among family members, especially in cases where physical survey hasn't been done recently.
•Licensed Surveyors: As the reference map for conducting fresh surveys, re-demarcation exercises, and ground-level verification work.
•Banks and Financial Institutions: To verify the collateral's physical extent during loan sanction, particularly for agricultural land loans where the actual field area must match the stated extent in the Patta Chitta.
FMB Sketch vs Patta Chitta vs Encumbrance Certificate (EC): Key Differences
| Feature | FMB Sketch | Patta Chitta | Encumbrance Certificate (EC) |
|---|
| Primary Purpose | Shows land boundaries, shape, and survey measurements | Confirms legal ownership and land classification | Lists all financial liabilities, charges, and transactions on the property |
| Document Type | Visual survey map / scaled sketch | Revenue ownership record | Transaction history register |
| Issuing Authority | Survey & Settlement Department / Revenue Dept. | Tahsildar / Revenue Department | Sub-Registrar Office |
| Key Information | Survey number, dimensions, boundary lines, adjacent plots | Owner name, land type, patta number, extent | Mortgages, sale deeds, court attachments, encumbrances |
| Used For | Boundary verification, DTCP approvals, construction planning | Ownership proof, loans, property registration | Due diligence, lien-free verification, loan approvals |
| Overlap With Others | Must be read alongside Patta Chitta for full land picture | Must be read alongside FMB for boundary accuracy | Must be read alongside Patta & FMB for complete title check |
Common Issues Related to FMB Sketches and Their Solutions
- Missing or Undigitized BoundariesSome FMB records may not be available online. In such cases, the records can be obtained through the local revenue authorities or with assistance from mypatta.
- Survey Number MismatchDifferences between the survey number in property documents and the FMB Sketch can be corrected by applying to the concerned revenue office with supporting documents.
- Subdivision DiscrepanciesBoundary differences may arise when land divisions are not officially updated. A subdivision correction request can help resolve the issue.
- Outdated FMB RecordsOlder FMB Sketches may not reflect recent changes to the property. Property owners can request a fresh survey and record update through the Survey Department.
Frequently Asked Questions (FAQs)
- 1.What is an FMB Sketch and why is it important?+
An FMB Sketch is a land survey map that shows a property's boundaries, dimensions, and survey details. It helps verify land records and supports property transactions, legal matters, and construction planning
- 2.Can I download an FMB Sketch online in Tamil Nadu?+
Yes. FMB Sketches for digitized records can be accessed online. mypatta also provides a quick and convenient way to obtain FMB Sketch records.
- 3.What is the difference between an FMB Sketch and a TSLR Sketch?+
An FMB Sketch is used for rural properties, while a TSLR Sketch applies to properties located in urban areas. Both documents help identify land boundaries and survey details.
- 4.Is an FMB Sketch required during property registration?+
While requirements may vary, an FMB Sketch is often used to verify property boundaries and survey information during property transactions.
- 5.What should I do if my FMB Sketch is not available online?+
If the record has not been digitized, you may need to contact the relevant revenue authorities or use services such as mypatta to help obtain the document.
Conclusion
An FMB Sketch is not an optional document — it is the physical foundation of any land record in Tamil Nadu. It tells you not just that someone owns a plot, but exactly where that plot is, how large it is, and what surrounds it. For anyone making a property decision , buying, selling, inheriting, or financing , skipping the FMB Sketch is a risk no one should take.
As Tamil Nadu's land records continue to digitize rapidly in 2026, accessing FMB Sketches has become easier than ever. But accuracy and speed still matter, especially when a transaction is time-sensitive or a legal filing has a deadline.
mypatta makes it simple: enter your property details, and get your verified FMB Sketch , along with Patta Chitta, Encumbrance Certificate, and a full title verification report , delivered in minutes. Because knowing what you own, and exactly where it starts and ends, is the first step to owning it confidently.
