TNRERA, Explained: Checking a Project and Filing a Complaint

Most buyers I meet in south Chennai have heard the word RERA but cannot say what it actually does for them. They assume that if a project is registered, the flat must be safe. That instinct is useful and also dangerous, because registration answers some questions and stays completely silent on others. Knowing the difference is what separates a buyer who uses RERA as a tool from one who treats it as a sticker on a brochure.

RERA is the Real Estate (Regulation and Development) Act, and in Tamil Nadu it is administered by TNRERA, the Tamil Nadu Real Estate Regulatory Authority. It was created to fix a market where promoters routinely overpromised, diverted money from one project to another, sold flats on inflated super built-up area, and delivered late with little consequence. The law pushed some of that risk back onto the promoter and gave buyers a public record and a forum to complain.

This guide explains, in plain language, what TNRERA covers, how to look up a project, which protections matter most when you are buying in 2026, and how the complaint process broadly works. Treat it as general buyer education. It is not advice on your specific deal, and on anything contentious you should still put the papers in front of a property lawyer.

What RERA is, and the problem it was meant to solve

Before 2016, a flat buyer in Chennai had very little leverage. If a builder collected your booking amount and then stalled for three years, your options were a civil suit that could outlast the delay itself, or a consumer forum that was slow and unevenly equipped for property disputes. Promoters knew this. The imbalance was the design of the old system, not a flaw in it.

RERA was the central government's attempt to rebalance things. The core ideas are simple. A covered project must be registered with the state authority before it can be advertised or sold. The promoter has to declare an honest completion date and stand by it. A defined share of buyer money must sit in a separate project account so it cannot be siphoned into the next launch. And sale has to happen on carpet area, the actual usable space inside your walls, not on a padded super built-up figure that nobody could verify.

In Tamil Nadu, TNRERA runs the registration system, maintains the public portal, hears buyer complaints, and can pass orders against promoters. It does not build anything or inspect construction quality as a routine matter. It is a regulator and an adjudicator, and understanding that boundary is the key to using it well.

Which projects must be registered, and which slip through

This is the part buyers misunderstand most often. RERA does not cover every building going up in Chennai. The Act sets size thresholds, and projects below them fall outside the registration requirement. Broadly, a project needs registration when the land involved is above a certain extent or the number of apartments crosses a small minimum. The commonly cited thresholds are land of more than roughly 500 square metres, or more than eight apartments counting all phases together. Pure renovation, repair or redevelopment that does not involve fresh marketing and selling is generally treated differently.

The practical consequence in our market is large. A lot of construction in localities like Nanganallur, Adambakkam, Madipakkam and the older parts of Velachery happens as small standalone buildings of four to eight flats on a single plot. Many of these legitimately sit below the threshold and are simply not registered with TNRERA. That does not make them illegal or unsafe. It means RERA's specific protections and its complaint forum may not be available to you on that purchase, so your due diligence has to be heavier, not lighter.

One more trap to know about. A few promoters split a genuinely large development into artificially small phases to dodge registration, or market an unregistered project as though it were registered. If a project is clearly above the threshold and the builder cannot show you a TNRERA number, that is a question you ask before you pay anything, not after.

How to look up a project on the TNRERA portal

The single most useful habit for any buyer is to check the project yourself on the official TNRERA portal (rera.tn.gov.in) rather than relying on what the sales office tells you. The site lists registered projects and registered agents, and the search is free. You can search by the registration number, the project name, or the promoter. Get the registration number from the builder and confirm it resolves to the exact project, address and promoter you are being sold.

What the registration page actually shows you

• Promoter details: the legal name of the company or individual behind the project, plus past and ongoing projects, which lets you see their delivery history rather than just the marketing brand.
• Approved plans and approvals: the sanctioned plan and the regulatory approvals (CMDA or DTCP and local body) declared at registration, so you can check that what you are buying matches what was sanctioned.
• The declared completion date: the date the promoter committed to in the registration. This is the date that legally matters for a possession claim, not the cheerful timeline in the brochure.
• Quarterly progress updates: registered promoters are required to file periodic updates on construction and financial progress. A project that has gone quiet on its filings is telling you something.
• Plan details and area: the carpet area definitions and unit details declared for the project.
• Complaints and orders: any complaints filed and orders passed against the project or promoter, which is one of the most revealing things you can read before you buy.

Read the declared completion date against the stage of construction you saw on your site visit. If a promoter has declared possession by a date that the physical site clearly cannot meet, you have found out something important for free. Pair this portal check with a proper site visit checklist so the paperwork and the concrete are telling you the same story.

The protections that matter most: carpet area and timely possession

Selling on carpet area, not inflated super built-up

For years, Chennai flats were sold on super built-up area, a figure that loaded your wall thickness, a share of the lobby, the staircase, sometimes even part of the terrace, onto the number you paid for. Two flats both advertised as 1,000 sq ft could have very different usable space. RERA requires covered projects to define and sell on carpet area, the net usable floor space within the walls of the unit. It does not stop a builder quoting a per sq ft rate that works out to the same rupees, but it forces an honest, comparable measure of what you actually get.

This matters because it lets you compare projects like for like and it gives you a defined number to hold the builder to at handover. If the delivered carpet area falls short of what the agreement promised, that is a measurable shortfall you can raise. If you are still hazy on these terms, our explainer on carpet area, saleable area and super built-up breaks down the maths with Chennai examples.

Timely possession and the cost of delay

The completion date a registered promoter declares is not decorative. If the project is delayed beyond it, RERA gives the buyer real options. Broadly, you can continue and claim interest from the promoter for the period of delay, or in cases of serious failure you can seek to withdraw and claim a refund with interest. The interest rate is meant to be fair and symmetrical, the same rate the promoter would charge you for a late payment, which removes the old one-sided penalty clauses that only ever punished the buyer.

There are also protections around title and structure. The promoter is responsible for conveying clear title, and for a defined defect-liability period after handover, structural defects and certain workmanship issues that surface are the promoter's responsibility to fix. None of this replaces your own title scrutiny. A RERA registration says nothing about whether the land was acquired through a clean sale deed or a shaky general power of attorney arrangement, and a GPA-based title can be challenged later however polished the brochure looks. The registration gives a covered buyer a forum to enforce the promoter's obligations; it does not certify the chain of title underneath.

How to file a complaint with TNRERA, and what relief is possible

If a registered promoter has broken a RERA obligation, delayed possession well past the declared date, sold on misleading area, changed the sanctioned plan without consent, or failed to deliver what the agreement promised, you can file a complaint with TNRERA. The process is built to be accessible without being a free-for-all, and the broad shape looks like this.

• Confirm the project is registered. The complaint route works against registered projects and promoters. For an unregistered small project, RERA's forum generally will not apply and you may be looking at consumer or civil remedies instead.
• Assemble your record. Your agreement for sale, allotment letter, payment receipts, the registration page and declared completion date, and any written communication with the builder. A complaint backed by dated documents carries weight; one built on phone calls does not.
• File the complaint with TNRERA, paying the prescribed fee, setting out plainly what was promised, what happened, and the specific relief you want. Be precise about dates and amounts.
• Attend the hearings. The authority hears both sides and can call for documents and explanations from the promoter. This is an adjudication, so the quality of your paperwork matters more than the heat of your grievance.
• Receive an order. TNRERA can direct the promoter to act, pay interest, refund, or comply, and orders can be enforced. Decisions can be carried to the appellate tribunal if either side disputes them.

On relief, the realistic outcomes are interest for the delay if you choose to keep the flat, a refund with interest where withdrawal is justified, directions to the promoter to deliver what was agreed or correct a deviation, and compensation in appropriate cases. What RERA is not is an instant remedy. Hearings take time, promoters contest, and enforcing an order against a builder who is genuinely out of money is its own battle. If that builder has borrowed against the project and defaulted, the lender's own SARFAESI recovery can complicate possession for buyers who thought a favourable order was the end of it. The forum is meaningfully better than what existed before. It is not a magic wand.

The limits of RERA you should hold in your head

Registration is not a quality certificate. TNRERA checks that a promoter has filed the required declarations, approvals and accounts. It does not vouch that the concrete is sound, the plumbing will hold, or the lift will still work in year six. A registered project can still be built badly, and a registered promoter can still cut corners. Your structural comfort comes from the builder's track record, the site visit, and ideally an independent technical eye, not from a registration number.

Registration is also not a guarantee against delay. It makes delay actionable, which is a different thing. And as covered above, a large share of small projects in south Chennai sit outside RERA's ambit entirely, so on those purchases you are relying on title scrutiny and the builder's reputation, with no portal record to fall back on. RERA is one layer of protection among several. It does not retire your other due diligence; it sits on top of it.

How to actually use RERA as a buyer in 2026

Put plainly, RERA gives you three concrete things: a public record to check before you pay, an honest measure of area with an enforceable possession date, and a forum to complain if a registered promoter breaks those promises. Use the first one religiously. Check the portal yourself, match the registration number to the exact project, read the declared completion date against what you saw on site, and look for any existing complaints before you part with money.

Then keep its limits in mind. Registration is a floor, not a ceiling, and many small Chennai projects are not covered at all. The buyers who get burned are usually the ones who treated the RERA logo as the end of their checking. The ones who do well treat it as the start.

For the rest of your due diligence, read our companion guides on the property documents field checklist, the encumbrance certificate, patta and chitta, vetting a local builder for red flags, and how to buy an under-construction flat safely. If you want a second pair of eyes on a specific project before you commit, reach out to our team.