Document Guide · Tamil Nadu
How to Check FMB sketch in Tamil Nadu — Complete Guide 2026
The FMB Sketch Tamil Nadu, or Field Measurement Book sketch, is the official survey drawing prepared by the Survey and Settlement Department showing exact boundaries, sub-divisions, and neighbour plots for any survey number. It is essential for land boundary verification before purchase. This guide covers the free download, fields, common defects, and red flags.
Quick Reference
Also calledField Measurement Book Sketch, Field Measurement Sketch (FMS), Survey Sketch
Issued byTamil Nadu Survey and Settlement Department, via Tahsildar or Taluk Office
Valid forLifetime, updated when sub-division, partition, or fresh survey occurs
CostFree to view and download on eservices.tn.gov.in; ₹100 to ₹500 for offline certified copy
Time takenInstant for digitised parcels; 3 to 7 working days for Taluk Office certified copy; longer for fresh field survey
Online portaleservices.tn.gov.in
1
What is FMB sketch in Tamil Nadu?
Definition
The FMB Sketch in Tamil Nadu is the official land survey drawing prepared and maintained by the Survey and Settlement Department, recording the boundaries, dimensions, sub-divisions, and adjacent survey numbers of every parcel. It draws its legal force from the Tamil Nadu Survey and Boundaries Act, 1923 and is preserved at the Tahsildar's office in book form, with digitised copies available through the Revenue Department's e-Services portal.
The FMB is the only document that fixes the parcel on the ground, not on paper. The Patta names the owner. The Chitta classifies the soil. The FMB draws the actual lines: corner-to-corner measurements, sub-division marks, and neighbour survey numbers along every face. Buyers who skip it pay for paper extent, not actual area. The Madras High Court regularly relies on FMB sketches as primary evidence in boundary disputes. A licensed surveyor's site verification against the FMB is the only credible way to confirm what the seller actually owns.
The Tamil Nadu government brought the FMB online through eservices.tn.gov.in under the View Patta and FMB / Chitta / TSLR Extract option. Download FMB online Tamil Nadu users select Rural, Natham, or Urban; pick district, taluk, village (or town, ward, block); and enter the survey number with sub-division. The portal returns the digitised sketch as a PDF for free. The portal page makes it explicit: the online copy is for reference only. For DTCP plan approval, building permits, layout approval, land sub-division, or bank loans, the Tahsildar's certified copy from the Taluk Office is what counts.
State-specific note: The online FMB on eservices.tn.gov.in is for reference only. For DTCP plan approval, registration, or bank loans, the Tahsildar's certified Field Measurement Book sketch from the Taluk Office is what holds legal weight.
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How to Get FMB Sketch in Tamil Nadu: Step-by-Step on eservices.tn.gov.in
Two routes get you the FMB Sketch Tamil Nadu. The eservices.tn.gov.in portal serves digitised sketches free of cost. The Tahsildar office FMB desk holds the master register and issues certified copies. Have your district, taluk, village, survey number, and sub-division ready before starting.
Online method (recommended)
1
Open the e-Services portal Visit [eservices
tn.gov.in](http://eservices.tn.gov.in). Click View Patta and FMB / Chitta / TSLR Extract on the homepage. The page works without login for FMB views.
2
Select area type Choose Rural, Natham (residential village land), or Urban
Rural and Natham use district-taluk-village inputs; Urban switches to district-taluk-town-ward-block. Pick the option that matches the parcel.
3
Enter survey details Select district, taluk, and village (or town, ward, block) from the dropdowns
Type the Survey Number and Sub-division Number. Solve the captcha and submit.
4
View and download the sketch The portal returns the FMB sketch survey number drawing as a PDF
Save the file. Read the F-line, G-line, sub-division lines, and neighbour survey numbers carefully. * ###
* Pull the Patta Chitta extract for the same survey number in the same session. Compare the extent on the Patta against the area enclosed by the FMB lines. A mismatch is a transfer-blocking defect.
Offline method (Sub-Registrar Office)
1
Visit the Tahsildar's Taluk office Each parcel falls under one Tahsildar's jurisdiction
Find the Taluk Office for the village. Carry the survey number, sub-division, prior Patta, and the sale deed if available.
2
File the application Submit a written request for a certified FMB Sketch for the survey number
The form is available at the counter. Pay the prescribed fee, commonly between ₹100 and ₹500 depending on the district and parcel size.
3
Field survey if needed For partition, sub-division, or where the existing FMB is outdated, the Surveyor or Revenue Inspector visits the parcel
Boundaries are remeasured and the sketch is updated in the Field Measurement Book.
4
Collect the certified copy The Tahsildar signs and stamps the certified FMB Sketch
Routine certified copies arrive in 3 to 7 working days. Fresh field survey can take longer. Banks, DTCP, and the Sub-Registrar accept only this certified version. *
* For boundary verification before purchase, hire a licensed surveyor to mark the F-line points on site against the FMB drawing. The sketch is only as useful as the on-ground correspondence it confirms.
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What Does FMB Sketch Contain in Tamil Nadu?
Every FMB Sketch is a technical drawing built from a fixed set of lines and references. Mismatch on any one against the on-ground reality is a boundary-defect signal.
| Field | What it means | What to check |
|---|---|---|
| Survey Number and Sub-division | Unique parcel identifier | Match against Patta, Chitta, sale deed, and EC |
| F-Line | Field boundary, the outer edge of the survey number | Confirm lengths against on-ground measurement |
| G-Line | Imaginary line dividing the parcel into triangles for area calculation | Verifies the geometry used to compute extent |
| Sub-division Lines | Internal boundaries within a survey number | Match against the sub-division stated in the deed |
| Extension Lines and Ladder | Reference offsets for measurement | Locates corners that have no natural marker |
| Neighbouring Survey Numbers | Survey numbers along each face of the parcel | Cross-check with neighbours' Patta and adjacent FMBs |
| Scale and North Arrow | Drawing scale and orientation | Confirms map can be physically reproduced on site |
| Total Extent | Computed area of the parcel | Match against Patta extent and physical measurement |
Good sign: A clean FMB shows F-line lengths matching the on-ground measurement, sub-division lines aligned with the sale deed schedule, neighbour survey numbers consistent with adjoining Pattas, and a clear scale and north arrow.
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Common Issues With FMB Sketch in Tamil Nadu
Every FMB Sketch is a technical drawing built from a fixed set of lines and references. Mismatch on any one against the on-ground reality is a boundary-defect signal.
FMB extent does not match Patta extent
The Patta says 1 acre 50 cents. The FMB lines, when measured, enclose only 1 acre 30 cents. Buyers who pay on Patta extent and inherit the FMB-shrunk parcel lose 20 cents permanently. The FMB is what the surveyor records; the Patta extent is derived from it. *
Fix: * Compute the FMB enclosed area independently before payment. If the difference is material, refuse to register at the Patta extent. Negotiate price on the FMB area only.
Sub-division not yet drawn after partition
Where land has been partitioned among legal heirs, the parent FMB still shows the undivided survey number. Each heir holds a paper share with no on-ground sub-division line. The Sub-Registrar refuses to register the sale of an undrawn sub-division. *
Fix: * Apply for an FMB sub-division at the Tahsildar's office with the partition deed, prior Patta, and identity proof. Wait for the field survey and updated sketch before registering the sale.
Online FMB shows survey number not found
The portal returns "no record" for some survey numbers. Common causes are partial digitisation in remote villages, recent re-survey numbers not yet uploaded, or village name mismatches in the dropdown. *
Fix: * Visit the Taluk Office in person. Submit a written request for a manual certified FMB along with a digitisation request to the Survey and Settlement Department.
FMB sketch is outdated and shows old neighbours
Land partitions, road widening, and government acquisitions over decades change neighbour survey numbers. An outdated FMB shows neighbour numbers that no longer exist on the ground, breaking boundary verification. *
Fix: * Request a re-survey through the Taluk Office. Cross-check the current neighbour Pattas to identify which neighbours have changed since the last update.
Encroachment visible on site but not on FMB
The seller shows physical fencing that includes a strip of the neighbour's parcel or government Poramboke. The FMB shows the original F-line, which is several feet inside the seller's fence. The buyer ends up with less land than the fence suggests. *
Fix: * Physically pace the F-line points against the FMB measurements. Walk away from any parcel where the fence and the F-line do not match.
FMB needed for DTCP plan approval not produced
DTCP and local body building permit applications, layout approvals, and bank loan files all need a certified FMB. Sellers offering only a screenshot from the portal slow down or block these downstream approvals. *
Fix: * Demand the Tahsildar's certified FMB before registration. The screenshot version is for reference only and does not move DTCP plan approval Tamil Nadu files forward.
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Why FMB Sketch Matters for Land Buyers in Tamil Nadu
The FMB is the single document that fixes the parcel on the ground rather than on paper.
Confirms exact land boundaries and extent The FMB is the primary record of land boundary verification in Tamil Nadu
Patta extent is derived from FMB. If the lines and the area do not match, the Patta is hollow. Buyers who skip it accept paper extent over actual extent.
Required for DTCP plan approval and building permits The Buyer Warning is direct: FMB is essential for boundary verification
DTCP, local bodies, and panchayats demand a current FMB before approving any layout or building plan. Without it, construction approvals cannot move.
Mandatory for bank home loan and crop loan files Banks pull the certified FMB alongside Patta, Chitta, and EC before sanctioning loans against rural land or layout plots
The sketch confirms the collateral physically exists in the dimensions claimed. A missing or outdated FMB delays disbursement.
Tamil Nadu-specific: Anchors partition and sub-division registration The Sub-Registrar in Tamil Nadu refuses to register the sale of a sub-division that has not been drawn into the FMB
After partition or sub-division, the FMB sub-division must close before the deed can be registered. This is the most common reason urban plot sales stall.
Red flag: If a seller in Tamil Nadu refuses to download the FMB on eservices.tn.gov.in in your presence, claims the sub-division is "in process", or shows a Patta extent without a matching FMB, walk away. The lines on paper must match the lines on the ground.
Browse verified land in Tamil Nadu
Browse Verified Tamil Nadu LandsFrequently Asked Questions
What is FMB Sketch Tamil Nadu?
FMB Sketch Tamil Nadu is the official Field Measurement Book sketch maintained by the Survey and Settlement Department. It records the survey number, F-line boundaries, sub-divisions, neighbour plots, and area for every parcel, and is the legal reference for on-ground boundary verification in Tamil Nadu.
How can I download FMB Sketch online in Tamil Nadu?
Visit eservices.tn.gov.in, click View Patta and FMB / Chitta / TSLR Extract, select Rural, Natham, or Urban, then enter district, taluk, village, survey number, and sub-division. The PDF downloads free of cost. The online copy is for reference, not certified.
Is FMB free to download in Tamil Nadu?
Yes. The Tamil Nadu Revenue Department portal provides FMB sketch downloads free of cost. Offline certified copies from the Tahsildar or Taluk Office attract a fee, commonly between ₹100 and ₹500 depending on the district and parcel size.
Is FMB Sketch necessary for land registration in Tamil Nadu?
Yes. The Sub-Registrar will not register the sale of an undrawn sub-division. For partition, sub-division, or layout plot sales, the FMB Sketch must reflect the parcel boundaries before registration. Banks and DTCP also require a certified FMB for approval.
What are F-line G-line and subdivision lines in an FMB?
F-line is the field boundary along the outer edge of the survey number. G-line is an imaginary line dividing the parcel into triangles for area computation. Sub-division lines mark internal boundaries between sub-divisions inside the same survey number.
What is the difference between FMB sketch and Patta?
Patta is the ownership record showing the legal owner, survey number, and tax dues. FMB is the survey sketch showing actual boundaries, sub-divisions, and neighbour plots. Patta proves who owns it; FMB proves what is owned and where the lines fall on the ground.
Can FMB sketches be corrected if there are errors?
Yes. File a written rectification request at the Tahsildar's office or the Survey Department with the sale deed, prior Patta, and identity proof. The Surveyor or Revenue Inspector visits the parcel for a fresh field survey before the FMB is updated.
How long does it take to get an FMB Sketch in Tamil Nadu?
Online download is instant where the FMB sketch survey number is digitised. Taluk Office certified copies take 3 to 7 working days. e-Sevai centre requests run 5 to 10 days. Fresh field survey for sub-division or partition takes longer.