Encumbrance Certificate, Patta and Chitta: The Tamil Nadu Land Records Every Flat Buyer Should Check (2026)

Most flat buyers in south Chennai spend weeks comparing carpet area, floor rise and per sq ft rates, then sign a sale agreement without ever reading the land records that decide whether the deal is actually safe. I see this pattern constantly in Velachery, Medavakkam, Sembakkam and around East Tambaram. The brochure looks clean, the builder is courteous, the bank is willing to lend, and the buyer assumes the title must be sound.

That assumption is where the trouble usually starts. In Tamil Nadu, the truth about a property sits in a handful of government records: the Encumbrance Certificate, the Patta and Chitta, the Adangal or A-Register, the guideline value, and the chain of parent documents. Each one answers a different question. Read together, they tell you who owns the land, whether it is free of loans and disputes, how it is classified, and whether the price you are paying makes sense on paper.

This guide walks through each record in plain language, with the specific quirks that apply when you are buying a flat rather than a plot. Treat it as general education and not as advice on your particular deal. For the final sign-off, always have a property lawyer review the originals. But you will negotiate better, and spot problems far earlier, if you understand what these documents are actually saying.

The Encumbrance Certificate: the property's financial history

The Encumbrance Certificate, almost always called the EC, is the single most important record for a buyer. It is a government statement of every registered transaction recorded against a property over a given period: sales, gift deeds, mortgages, partition deeds, releases, court attachments. If a previous owner took a loan and pledged the property, it shows. If there was a sale you were never told about, it shows. If the property is clean, the EC reads as a clear set of entries with no surprises.

The word to understand is encumbrance, meaning any claim or liability attached to the property. A nil encumbrance for the relevant period means no registered loans or transfers are pending against it. But read this carefully. The EC only captures registered events. An unregistered agreement, an oral family arrangement, or an unpaid private loan will not appear. That is one reason the EC alone is never enough.

13-year versus 30-year EC

You will hear about a 13-year EC and a 30-year EC. The number is simply the period the certificate covers. A 13-year EC is the common minimum because it roughly aligns with the period banks and most buyers treat as adequate for a marketable title. A 30-year EC goes further back and is the safer choice, especially for resale flats and for any land with a complicated ownership history.

My practical view for 2026: for a new flat where the land was recently acquired by the builder, pull the EC from the date the builder bought the land, even if that is less than 13 years. For a resale flat, ask for a 30-year EC if you can get it. The extra cost is trivial against the price of the flat, and the longer window catches old mortgages or partitions that a 13-year search would miss.

How to obtain the EC online via TNREGINET

Tamil Nadu lets you apply for an EC online through the registration department portal, TNREGINET (tnreginet.gov.in). You register as a user, choose the EC service, and provide the zone, district, sub-registrar office, village, and the survey number or document details. You can pay the fee online and download a digitally signed certificate. A few things to get right when you do this.

• Match the survey number and boundaries on the EC to the ones in the sale deed. A mismatch is a genuine warning sign, not a clerical detail.
• Check the sub-registrar office is the correct one for the property's location. An EC from the wrong office can read as nil simply because it searched the wrong place.
• Cross-check every owner name in the EC against the chain of title documents the seller has given you.
• For any deal you are serious about, get a certified EC from the sub-registrar office in addition to the online copy, and have your lawyer verify it.

Patta and Chitta: who owns the land and what kind of land it is

Patta is a revenue record maintained by the Tamil Nadu revenue department that records ownership of a specific parcel of land. It lists the owner's name, the survey and subdivision numbers, the extent of land, and the village and taluk. When people say a property has clear patta, they mean the land is recorded in the rightful owner's name in the government's own register.

Chitta is a related revenue record that classifies the land and notes details such as whether it is wetland (nanjai) or dryland (punjai), along with the extent. In recent years much of this information has been merged into combined revenue records and online statements, but buyers and officials still use the terms patta and chitta in everyday conversation. The point for you is simple. These records connect a human owner to a defined piece of land, and they tell you the land's revenue classification.

How a flat buyer relates to land through UDS

Here is the part that trips up apartment buyers. When you buy a flat, you are not buying a marked plot of land. You are buying a constructed unit plus an undivided share of the land the building sits on, known as the UDS. The patta for the underlying land usually stands in the name of the landowner or, after construction, in a form that reflects the apartment ownership structure. You will not get an individual patta for a tiny rectangle under your specific flat.

So your questions as a flat buyer are slightly different from a plot buyer's. You want to confirm that the land on which the building stands has clear patta in the name of the person or entity who sold or developed it, that the survey numbers match across the patta, the EC and the sale deed, and that your sale deed clearly specifies your UDS in square feet. A flat sold with a vague or missing UDS is a problem you do not want to inherit.

• Confirm the land's patta is in the rightful owner or developer's name, and that the extent matches the project's total land area.
• Make sure your sale deed states your exact undivided share of land, expressed as a measurable extent, not just a percentage with no basis.
• Check that the survey numbers on the patta, EC and sale deed all agree. Apartment projects are sometimes built across multiple survey numbers, so account for all of them.
• For older or independent properties, verify whether patta transfer (name change) has been done in favour of the current seller.

Online access via the TN eServices portals

Tamil Nadu's revenue records are available online through the state's eServices portals, including the patta and chitta verification service and the Nilam land records portal. You can view a patta or chitta extract by entering the district, taluk, village and survey or subdivision number, and verify a patta using its reference number. Use this to do a quick sanity check before you ever pay an advance.

Treat the online extract as a screening tool. It confirms the basics quickly and cheaply. It does not replace a lawyer examining certified copies of the revenue records and the title chain.

Adangal, A-Register and land classification

The Adangal, and the related A-Register, are village-level revenue records that capture more granular detail about a parcel: cultivation details, classification, government or poramboke status, and other notings the village administrative officer maintains. For an ordinary flat buyer in an established residential area, you may not need to go this deep. But the classification matters more than people realise.

The reason is conversion. Much land on the southern fringes of Chennai, around the outer stretches of Medavakkam, Nanmangalam and the areas past East Tambaram, was originally agricultural. Agricultural land has to be properly converted to residential or non-agricultural use before it can legally support apartments, and the approvals must come from the right authority, whether CMDA within the metropolitan area or DTCP outside it. The revenue classification in the Adangal or chitta is one clue to whether that conversion and approval story is clean.

Guideline value and why it matters

Guideline value, sometimes called guidance value, is the minimum value the Tamil Nadu government fixes for land in a given street or area for the purpose of registration. You cannot register a sale below the applicable guideline value, and your stamp duty and registration charges are calculated on the higher of the guideline value or the actual sale consideration. You can look up the guideline value for a street or survey number on the TNREGINET portal.

For a buyer, guideline value is useful in two ways. First, it sets a floor for your registration costs, so it feeds directly into your total outlay. Second, the gap between guideline value and the market price tells you something. In sought-after pockets of Velachery or Nanganallur, market rates sit well above guideline value, which is normal. A market price that is suspiciously close to or below guideline value deserves a second look at why the seller is pricing it that way.

For the actual numbers on what you will pay at the sub-registrar, see our detailed breakdown in the stamp duty and registration charges guide. Guideline value as of 2026 varies street by street, so always check the exact figure for your property rather than relying on an area-wide assumption.

Parent documents and the chain of title

The chain of title is the sequence of documents that traces how ownership passed from one party to the next, right up to the person selling to you. The parent document, sometimes called the mother deed, is the earlier deed through which your seller, or the seller before them, acquired the property. A clean chain means every link is accounted for, with no gaps, no unexplained jumps in ownership, and no missing release of a previous mortgage.

For a flat, the chain typically runs from the original landowner, through the development or joint venture arrangement with the builder, to the sale deeds issued to individual flat buyers. You want to see how the builder acquired the land, the approved building plan, and the deed structure that gives you both the constructed unit and your UDS. If a link is missing or the seller cannot produce a parent document, slow down.

• Trace ownership through each parent deed back at least to the period your EC covers, and ideally further for resale properties.
• Confirm any earlier mortgage was properly released, with the release deed reflected in the EC.
• For a builder purchase, see the deed by which the builder acquired the land and the approved plan for the project.
• Watch for power of attorney sales. A general power of attorney is not a substitute for a registered sale deed, and POA-based transactions need extra scrutiny.

Putting it together: a flat buyer's red flags

You do not need to become a title expert. You need to know enough to recognise when something is off and to brief your lawyer with the right questions. These are the signals that should make you pause before paying any advance.

• Survey numbers do not match across the EC, patta and sale deed.
• The EC shows a mortgage with no corresponding release, meaning a loan may still be live against the property.
• The land is still classified as agricultural in the revenue records with no conversion or planning approval produced.
• Your sale deed is silent or vague about the UDS, or the UDS extent looks too small for the price.
• The seller relies on a general power of attorney instead of a clear registered title.
• Patta has not been transferred into the current seller's name for an independent property.
• The builder cannot produce the parent deed or the approved building plan.
• Names of past owners in the EC do not reconcile with the chain of title documents.

Any one of these is a reason to get a property lawyer involved before you commit money. None of them automatically kills a deal. Many are fixable. But they should be resolved on paper, in front of the right authority, before your advance leaves your account, not afterwards.

The short version

Read the EC to understand the property's registered financial history, and pull a longer 30-year search for resale flats. Check the patta and chitta to confirm who owns the underlying land and how it is classified, and make sure your UDS is clearly stated in your sale deed. Use the Adangal classification and the planning approvals to confirm the land is legitimately residential. Look up the guideline value for your costs and as a sanity check on price. Then walk the chain of title through the parent documents and make sure every link holds.

All of these records are now accessible online through TNREGINET and the Tamil Nadu eServices and Nilam portals, which means you can do meaningful homework yourself before you ever pay an advance. What the portals cannot do is interpret an ambiguous deed, weigh a power of attorney, or judge whether a release was validly executed. That final judgement belongs to a property lawyer reviewing the certified originals for your specific deal.

For more on the practical side of a south Chennai purchase, see our property documents field checklist, the carpet area versus saleable area explainer, and our comparison of resale versus new construction flats. If you are weighing specific localities, the Velachery, Medavakkam and Nanganallur comparison is a useful starting point. When you are ready for a record-by-record check on a property you like, reach out to our team and we will point you to the documents to gather first.