Buying a home is the largest financial commitment most Indian families will ever make — and for decades, it was also one of the least protected. Buyers paid in instalments for something that did not yet exist, signed agreements they had no power to negotiate, and had no independent authority to turn to when a project stalled. The Real Estate (Regulation and Development) Act, 2016 changed that, and the RERA number is the single most visible piece of that change.
If you are shortlisting apartments, plots or commercial units anywhere in India, the RERA number is the first thing you should ask for and the first thing you should verify yourself. This guide explains what is RERA Number in Real Estate actually is, what its format tells you, which projects are legally required to have one, exactly how to check it online, what protections it unlocks, and what to do if a project cannot produce one.
What Is RERA Number in Real Estate? A Simple Definition
A RERA number is the unique registration ID issued to a real estate project or a real estate agent by the Real Estate Regulatory Authority of the state where the project is located, under the Real Estate (Regulation and Development) Act, 2016. It confirms that the project is legally registered with the regulator and that its approvals, layout, carpet areas and completion timeline are on public record for any buyer to inspect.
In practical terms, the RERA number is a receipt of accountability. It means a promoter has submitted the project’s land title, sanctioned plans, approvals and declared completion date to a statutory authority, and has accepted a set of legally binding obligations in exchange for the right to advertise and sell. A project without one is not merely unregistered — in most cases it is being marketed in breach of the law.
RERA Number at a Glance
| Question | Answer |
| What does RERA stand for? | Real Estate (Regulation and Development) Act, 2016 |
| What is a RERA number? | The unique registration ID issued to a registered project or registered agent |
| Who issues it? | The Real Estate Regulatory Authority of the relevant state or union territory |
| When is registration mandatory? | Where the land proposed to be developed exceeds 500 square metres, or more than eight apartments are proposed across all phases |
| Where must it be displayed? | Every advertisement, brochure, prospectus, hoarding and online listing for the project |
| Where do you verify it? | The official RERA portal of the state in which the project is located |
| Does it cover commercial property? | Yes — the Act covers residential and commercial real estate projects |
| What is the penalty for not registering? | A penalty of up to ten per cent of the estimated project cost, with imprisonment of up to three years possible on continued default |
Why RERA Exists: The Problem It Was Built to Solve
Before 2016, Indian real estate operated with almost no sector-specific regulator. The consequences were familiar to anyone who bought a home in that era. Prices were quoted on “super built-up area”, an elastic figure that could include lift lobbies, staircases and clubhouses, so buyers routinely paid for far less usable space than they thought. Possession dates slipped by years with no consequence. Money collected for one project was diverted to fund land acquisition for the next, leaving the first stranded at plinth level. Buyer agreements were drafted entirely by promoters, imposing steep penalties on the buyer for late payment while offering token compensation for late delivery.
The Act, passed in March 2016 and brought fully into force on 1 May 2017, addressed each of these directly. It required every state and union territory to constitute a Real Estate Regulatory Authority and a Real Estate Appellate Tribunal. It made registration compulsory for most projects before any advertising or sale. It mandated that pricing be quoted on carpet area. It required a substantial share of buyer money to be ring-fenced for the project it was collected for. And it created a forum where an individual buyer could file a complaint without hiring litigation counsel and waiting years in a civil court.
Because real estate is a concurrent subject, implementation is handled state by state. The central Act sets the framework; each state notifies its own rules, runs its own authority and maintains its own public portal. This is why there is no single national RERA number format and no single national database — a point that trips up a great many buyers.
RERA Number vs RERA Registration vs Agent Registration Number
Three distinct identifiers get referred to loosely as “the RERA number”, and confusing them is one of the more common ways buyers get misled. It is worth being precise about which one you are being shown.
| Identifier | What it certifies | What it does not tell you |
| Project registration number | That this specific project — or this specific phase of it — is registered with the state authority | Nothing about other projects by the same promoter, or about later phases |
| Agent registration number | That the broker or channel partner selling to you is registered under the Act | Nothing about whether the project itself is registered |
| Promoter or company identifiers | Corporate existence — CIN, GST registration, licence numbers | Nothing about regulatory compliance for the project you are buying into |
Which Projects Must Have a RERA Number?
Registration is mandatory before a promoter can advertise, market, book, sell or offer for sale any plot, apartment or building in a real estate project, where either of two thresholds is crossed.
Registration is required when
- The area of land proposed to be developed exceeds 500 square metres; or
- The number of apartments proposed to be developed exceeds eight, inclusive of all phases.
Note the “or” — crossing either threshold triggers the requirement, not both. And note “inclusive of all phases”, which is what prevents a promoter from slicing a large development into small sub-projects to stay under the limit.
Registration is generally not required when
- The project falls below both thresholds above.
- The work involves only renovation, repair or re-development that does not involve marketing, advertising, selling or new allotment.
- A completion certificate for the project was obtained before the Act commenced in the relevant state.
Two clarifications that come up constantly. First, the Act is not limited to housing — commercial projects, including office and retail developments, are covered on the same basis. Second, ongoing projects that had not received a completion certificate when the Act came into force in a given state were required to register, which is why many projects launched before 2016 still carry a registration number.
Agents must register too
Real estate agents, brokers and channel partners are separately required to register and obtain their own registration number, and are prohibited from facilitating the sale of an unregistered project. If a broker is showing you a project, you are entitled to ask for both numbers — theirs and the project’s.
How to Check a RERA Number Online: Step by Step
Every state authority maintains a public search facility. The interface differs from state to state, but the sequence is essentially the same everywhere.
- Identify the correct state. Verification happens on the portal of the state where the property is physically located — not where the developer is headquartered and not where you live. This is the step people most often get wrong.
- Open the official state RERA portal. Reach it through the state government domain or an official government directory. Avoid third-party “RERA check” websites, which are often lead-generation traps carrying stale or incomplete data.
- Find the registered projects search. Portals typically label this “Registered Projects”, “Search Project” or similar, usually accessible without creating an account.
- Search by registration number. Enter the number exactly as printed on the brochure. If it returns nothing, search instead by promoter name or project name — a nil result on the number alone is itself a significant finding.
- Open the project record. Confirm the registered project name, the promoter’s legal entity name, the location and the specific phase or tower match what you are actually being sold.
- Check status and validity. Look at whether the registration is active, and at the registration validity or declared completion date. An expired or lapsed registration is a serious issue, not a formality.
- Download and cross-check the disclosures. Compare the carpet areas, unit plan, approvals and amenities on the portal against the brochure and the draft agreement. Where they disagree, the portal filing is the record the promoter is legally bound by.
Why the RERA Number Matters to You as a Buyer
Registration is not paperwork for its own sake. It attaches a specific set of legally enforceable obligations to the promoter, and those obligations are what you are actually buying protection from.
| Protection | What it means in practice |
| Carpet area pricing | Price and area must be stated on carpet area — the usable floor area within the walls of the unit — rather than on an inflated super built-up figure |
| Ring-fenced project funds | A substantial majority of the money collected from buyers must be held in a separate account and used only for that project’s land and construction costs |
| Cap on advance payment | The promoter cannot take more than a limited advance before a written agreement for sale is executed and registered |
| Advertising accountability | If you paid relying on a claim in an advertisement or prospectus that proves false, you have a statutory route to withdraw and recover your money |
| Structural defect liability | The promoter remains liable to rectify structural defects and workmanship failures notified within five years of possession |
| Delay remedy | On failure to hand over possession as agreed, you may withdraw and claim a refund with interest, or stay in the project and claim interest for every month of delay |
| A real grievance forum | Complaints go to the state authority, with an appeal route to the Appellate Tribunal, instead of straight into general civil litigation |
Looking for a Home in Guwahati? Start With the Paperwork
A RERA number will not tell you whether you will be happy in a home. What it does is remove an entire category of risk from the decision, so that what remains is a question of layout, location, budget and fit — which is where your attention should be in the first place.
Ambika Housing has been developing residential and commercial properties in Guwahati since 2002, with a focus on construction quality, modern design and value for money. Our completed and ongoing developments include Ambika Ananda and Diamond Home. If you are evaluating a property with us, we will provide the registration details for the relevant project in writing so that you can verify them yourself on the official portal — as you should with any developer, including us.
To walk through current projects, floor plans and unit-wise carpet areas, or to arrange a site visit, get in touch with the Ambika Housing team.
