In this guide — 6 sections
Verify Patta in the current owner’s name, an Encumbrance Certificate covering 13–30 years, the registered sale deed, the full title chain, tax receipts, FMB sketch, layout approval, land-use classification and building plan approval. Patta is a revenue record, not proof of ownership — that comes from the registered title deed. Both must be read together, with a lawyer’s opinion.
The layer beneath every other guide in this series. Document verification comes before design, before approval, before anyone quotes you a price — because every one of those depends on the land being unambiguously yours to build on.
What Patta Proves — and what it does not
A Patta is a land revenue record issued by the Taluk office, showing the owner’s name as recognised for revenue purposes, the survey number, the land extent, the land classification — wet, dry or house site (natham) — and the assessed revenue tax.
Patta is a revenue record. It does not by itself conclusively prove legal ownership. Ownership is established by the registered title deed — the sale deed or other transfer document.
What a Patta does do is act as a mandatory supporting document: building plan approval requires a current Patta; banks require one before releasing a construction loan; and it confirms the land classification that decides whether you may build at all. So it is necessary without being sufficient — which is why the two documents are always read together.
Four types you may encounter
- Regular Patta (Patta Chitta) — the standard land revenue record for non-agricultural land and agricultural plots, issued by the Tahsildar.
- Natham Patta — issued for residential plots within village settlement areas. The standard Patta for house sites in village areas.
- Inam Patta — historically linked to property granted for religious, educational or charitable purposes. Requires specific legal verification of alienability.
- TSLR Extract — Town Survey Land Records, applicable to urban areas. The key land record for Chennai city plots, functionally equivalent to a rural Patta.
After a purchase, the Patta does not transfer itself. The new owner must apply for mutation at the Taluk office. Building on a plot whose Patta still carries the previous owner’s name creates administrative complications at approval, at the bank and at utility connection — which is why it appears as the first remedy in the problems section below.
The Encumbrance Certificate, and its blind spot
An EC — Villangam Certificate in Tamil — is issued by the Sub-Registrar’s Office under the Tamil Nadu Registration Department, recording all registered transactions against a property for a specified period: sale deeds, mortgage deeds, gift deeds, court attachments and leases. Issued through the TNREGINET portal.
Encumbrance Certificate
Issued where one or more registered transactions exist in the period. Lists them all — sale, mortgage, court attachment, lease.
Nil Encumbrance Certificate
Issued where no registered transactions are found. It does not mean there are zero legal claims — only that none was registered at the SRO in that period.
What it reveals
- The ownership chain — all registered sale and transfer transactions showing how the property changed hands.
- Mortgages and loans — outstanding home loans, loans against property, or charges registered in favour of banks.
- Court attachments — any order attaching or restraining the property.
- Leases and agreements — registered lease or development agreements affecting the property.
The EC records only what was registered at the Sub-Registrar’s Office. Unregistered agreements, oral claims, family disputes, possession claims and encroachments will not appear.
It is also a historical record. It does not confirm current legal status if a dispute has arisen since the last entry, or if an unregistered transaction has occurred. A Form 16 — Nil EC — is the one most easily misread: it means no claim was registered, not that no claim exists. An EC should always be read alongside the Patta, the original title deeds and a full legal opinion.
How to obtain and read one
- Visit the TNREGINET portalGo to tnreginet.gov.in and select Encumbrance Certificate under E-Services.
- Enter the property detailsDistrict, Sub-Registrar Office, survey number or document number, and the period you want covered.
- Request an adequate period13 to 30 years is the usual advice — some banks and lawyers recommend 30 — to cover meaningful ownership history. The right period depends on your situation and your lawyer’s view.
- Review every entryGo through each transaction listed. Verify that any mortgage shown has been released, by checking for a release deed or mortgage release entry.
- Cross-check against your originalsEach sale deed or transfer shown in the EC should match the document chain in your possession.
- Obtain a certified copyA digitally signed EC from the portal, or a physical certified copy from the SRO, carries greater legal weight for formal submissions and bank applications than a plain online extract.
Ten Categories to verify before you build
Ten document categories to verify before constructionThe three tinted rows are the ones that stop a project outright if they are wrong.
Patta / land revenue records
- Patta is in the current owner’s name — if not, apply for mutation at the Taluk office before proceeding
- Correct survey number, land extent and land classification shown
- For urban Chennai plots — TSLR Extract in order
- Land classification permits construction — house site or natham, not purely agricultural without conversion
Encumbrance Certificate
- EC obtained for an adequate period — 13 to 30 years, per your lawyer’s advice
- Every mortgage listed shows a corresponding release deed
- No court attachment or restraint order appears
- Digitally signed or certified copy obtained, not a plain online extract
Title deed / sale deed
- Registered sale deed in the current owner’s name — original and certified copy
- Registered at the correct SRO with a valid document number
- Market value and stamp duty paid correctly at registration
- All sellers accounted for — no missing co-owners or heirs
Parent documents — the title chain
- All parent documents available and traceable — previous sale deeds, gift deeds, partition deeds, will or court decree
- Chain clear from the earliest available document to the current owner
- No gap — every transfer supported by a registered document
- Legal heirship or succession documents in order where inherited
Property tax receipts
- Latest receipt from the local body shows the current owner’s name
- All dues cleared — no arrears
- Assessment matches the property — survey number, door number and extent consistent
Survey documents and FMB sketch
- FMB sketch from the Taluk or Survey Department confirms boundaries and dimensions
- Survey number on the FMB matches the Patta and the sale deed
- Physical boundaries on the ground align with the sketch — verify on a site visit
- No encroachment on government land, a water body, road reserve or neighbouring plot
Layout approval documents
- Layout Approval Order obtained where the plot is part of a layout
- LAO issued by the correct authority for the plot’s jurisdiction — CMDA within the CMA, DTCP outside it
- Your survey number listed within the approved layout — ask for the subdivision plan
- Layout conditions noted — road widths, open space reservations, setbacks
Land-use and planning records
- Land-use classification confirmed under the applicable Master Plan
- Proposed use matches the permitted zone — otherwise a land-use change is needed before applying for approval
- No CRZ restriction where the plot is near the coast or a waterway
- No airport height funnel restriction — confirm an AAI NOC if required
Building plan approval
- Valid Planning Permission from the correct authority
- Approved plan and sanction order in hand before construction begins — building without approval is illegal under the TN Town and Country Planning Act, 1971
- Approved plan matches the proposed construction — any deviation needs a revision application
- Within its validity period — DTCP permissions run 8 years; check the CMDA sanction conditions
Other documents as applicable
- NOC from TANGEDCO, CMWSSB or the relevant utility where required
- AAI NOC where the plot falls in the airport height funnel zone
- CRZ NOC from the Tamil Nadu Coastal Zone Management Authority where applicable
- Registered Power of Attorney if the owner cannot sign personally
- Completion Certificate for any existing structures on the plot
A Patta Is a Revenue Record. Ownership Comes From the Title Deed.
Approval needs the Patta, the bank needs the Patta, and the land classification decides whether you may build — but neither document proves title on its own.
Cross-Checking the whole set
No single document is conclusive. What gives confidence is agreement between them — and disagreement is the signal worth acting on:
- The survey number must be identical across the Patta, sale deed, EC, FMB sketch and approved layout plan. A sub-division number represented inconsistently — 100/2A against 100/2 — is one of the most common causes of an approval query.
- The owner’s name must match across the Patta, the latest sale deed and the property tax assessment. Where it does not, mutation is outstanding somewhere.
- The extent must reconcile. The area in the Patta, the deed and the FMB sketch should agree. A discrepancy points to sub-division error, encroachment or a revenue record mistake.
- The EC chain must match your originals. Every transaction listed should correspond to a document you can produce. An entry you cannot account for is a gap in the chain, not a clerical oddity.
- The physical boundary must match the sketch. This is the only check that requires standing on the land, and the only one that reveals encroachment.
Survey numbers, names, extents and the EC chain can all be reconciled from paper, in an afternoon, before you spend anything. Only the boundary check requires a site visit — and it is the one that finds encroachment, which is also the problem that is hardest and slowest to resolve once construction has started.
So the sequence that saves the most trouble is: reconcile the paperwork first, then walk the plot with the FMB sketch in hand.
Eight Problems, and what to do about each
The five bordered blocks are the ones where you should not commence construction at all until resolved. The other three can often be progressed in parallel with design work:
Patta not in the current owner’s name
EC shows an unreleased mortgage
EC shows a court attachment
Gap or break in the title chain
Survey number or boundary discrepancy
Land classified as agricultural
No layout approval for the plot
Building approval expired or absent
Notice the pattern in who resolves what. Two of the eight are administrative — a Taluk office and a lender, both a matter of process and time. Three require a lawyer, and one requires a licensed surveyor. Only the last two are within an architect’s remit at all. Which is why document verification belongs at the very start of a project, in parallel with nothing — the people who fix these problems are not the people who design your house, and their timelines do not compress.
Pre-construction document checklist
Swipe or scroll to see the full table →
| Check | Before construction begins |
|---|---|
| Patta in the current owner’s name — mutation complete if recently purchased | |
| Land classification permits construction — house site or natham, or conversion obtained | |
| TSLR Extract in order for an urban Chennai plot | |
| EC obtained for 13–30 years as a digitally signed or certified copy | |
| Every mortgage in the EC shows a registered release | |
| No court attachment or restraint appears in the EC | |
| Registered sale deed in the current owner’s name, original and certified copy | |
| Title chain complete — every transfer supported by a registered document | |
| Property tax cleared with no arrears, assessment matching the property | |
| FMB sketch obtained and survey number matching Patta and deed | |
| Physical boundaries verified on site against the FMB sketch | |
| No encroachment on government land, water body, road reserve or neighbour | |
| Layout Approval Order from the correct authority, with your survey number listed | |
| Land use matches the proposed construction under the applicable Master Plan | |
| CRZ and airport funnel restrictions checked where relevant | |
| Valid Planning Permission in hand before construction commences | |
| Approval within its validity period — DTCP 8 years; check CMDA sanction conditions | |
| Utility NOCs obtained where required — TANGEDCO, CMWSSB, AAI, TNCZMA | |
| Legal opinion from a property advocate on the complete document set |
Form 16 Means No Claim Was Registered — Not That None Exists
Unregistered agreements, oral claims, family disputes and encroachments never appear in an EC. It is a historical record of the register, not a statement about your land.
Every document issue discovered before construction is a solvable problem. The same issues discovered after the structure is completed are dramatically harder, costlier, and may not be fully resolvable.
— Why this belongs at the start, not the middle
Frequently Asked Questions
What documents are required before house construction in Chennai?
Updated Patta — or TSLR extract for urban plots — in the owner’s name; an EC for an adequate period; the registered sale deed and parent documents; latest property tax receipt; FMB or survey sketch; layout approval order where applicable; confirmation of land-use zone; and valid building plan approval from the correct authority. Exact requirements vary by property type, location and jurisdiction.
What is Patta and why does it matter?
A land revenue record issued by the Taluk office showing the recognised landholder, survey number, extent and land classification. It matters because building plan approval requires a current Patta, banks require one for construction loans, and the classification determines whether construction is permissible at all.
Is Patta proof of ownership?
No. Patta is a revenue record recognising who holds the land for revenue purposes. Legal ownership is established by the registered title deed — the sale deed or other transfer document. A Patta in the owner’s name is important supporting evidence and is widely required, but it is not conclusive on its own.
What is an Encumbrance Certificate?
Called Villangam Certificate in Tamil, it is issued by the Sub-Registrar’s Office and records all registered transactions against a property for a specified period — sales, mortgages, gifts, court attachments and leases. Obtained through the TNREGINET portal.
What is the difference between Form 15 and Form 16?
Form 15 is issued where one or more registered transactions exist in the period, and lists them. Form 16 is a Nil EC, issued where none is found. Form 16 does not mean there are zero legal claims — only that no claim was registered at the SRO during that period.
How many years should my EC cover?
Generally 13 to 30 years, with some banks and lawyers recommending 30, to cover meaningful ownership history. The right period depends on your specific situation and your lawyer’s advice. Request a digitally signed or certified copy rather than a plain online extract for formal submissions.
What does an EC not show?
Anything unregistered. Oral claims, unregistered agreements, family disputes, possession claims and encroachments never appear. It is also historical — it says nothing about a dispute arising after the last entry. Read it alongside the Patta, the original deeds and a full legal opinion.
My Patta is in the previous owner’s name. What now?
Apply for mutation at the Taluk office with the registered sale deed, previous Patta, proof of purchase and prescribed fees. Processing typically takes 15–30 working days depending on the taluk. Do not begin construction until the Patta is transferred — it creates complications at approval, at the bank and at utility connection.
Can I build on agricultural land?
Not without first obtaining a land-use conversion order from the District Collector’s office. Building on unconverted agricultural land is illegal and can result in demolition orders. Check the land classification on the Patta before anything else.
How long is a building approval valid?
DTCP planning permissions carry an 8-year validity. CMDA approvals are governed by the conditions stated in the sanction order, so check yours specifically. Never begin construction on an expired or absent approval — apply for a fresh one instead.
We Work the Checklist Before the First Drawing Is Prepared
Applicable authority confirmed, land-use classification verified, document status reviewed — and building plan applications filed only once the underlying documents are clean.
The legal foundation the house stands on
Property document verification is not a formality to be cleared on the way to the interesting part. Patta, EC, title chain and approval together establish that the land is unambiguously yours to build on — and every issue found now is a solvable one, while the same issue found later may not be. Contact Buildiyo for a review of your document status.