Reading a Property Ad in Mumbai: What RERA Says Every Promoter Must Show

Stand on any Western Express Highway signal in Mumbai for two minutes and you will see a dozen promises: sea views, possession dates, launch prices, clubhouses rendered in evening light. A hoarding, a newspaper page, a WhatsApp forward and a sample flat are all trying to do the same thing, which is to get a booking amount out of you before you have read a single legal document.

The Real Estate (Regulation and Development) Act, 2016 treats those materials seriously. It defines what counts as an advertisement, says when a project may be advertised at all, lists what an advertisement must show, and gives a buyer a remedy if it turns out to be false. This guide reads those provisions from the Act and turns them into a practical routine for a Mumbai buyer.

The short answer. Under the RERA Act, a promoter cannot advertise, market, book, sell or invite purchases in a project that needs registration until it is registered with the Authority. Every advertisement or prospectus must prominently mention the Authority's website address and include the project's registration number. If you pay an advance on the basis of an incorrect or false statement in an advertisement or a model flat and suffer loss, the promoter must compensate you, and if you choose to withdraw you get your entire investment back with interest. The trade-off: these rights depend on evidence, so a buyer who keeps nothing from the marketing stage has little to rely on later.

What counts as an advertisement under RERA?

Section 2(b) of the Real Estate (Regulation and Development) Act, 2016 in its Gazette text defines an advertisement broadly. It means any document described or issued as an advertisement through any medium, and includes any notice, circular or other documents or publicity in any form, informing persons about a real estate project, offering a plot, building or apartment for sale, or inviting persons to purchase or to make advances or deposits.

That covers far more than newspaper pages. A brochure handed out at a site office, a message forwarded by a sales executive, a project microsite and a hoarding all inform people about a project and invite purchases. For a buyer, the useful habit is to treat every piece of marketing as a document you may need to produce later.

Section 12 widens the net further by naming the model apartment, plot or building alongside the notice, advertisement and prospectus. A sample flat at a Mumbai site office is therefore part of what the promoter has represented to you, not just a decoration.

When can a promoter start advertising a project?

Section 3(1) is direct. No promoter shall advertise, market, book, sell or offer for sale, or invite persons to purchase in any manner any plot, apartment or building in a real estate project in any planning area without registering the project with the Real Estate Regulatory Authority.

The words "in any manner" matter. An offer that invites you to purchase or collects money before registration, whatever it is called, falls within the activities the section lists. If a sales team asks for a token amount for a project that does not yet have a registration number, ask them to show the registration first.

Section 3(2) lists exemptions. Registration is not required where the land proposed to be developed does not exceed five hundred square metres or the number of apartments does not exceed eight, inclusive of all phases, though the appropriate government can reduce that threshold. It is also not required where the completion certificate was received before the Act commenced, or for renovation, repair or redevelopment that does not involve marketing, advertising, selling or new allotment. Because a phase counts as a standalone project under the explanation to Section 3, each phase needs its own registration.

The penalty is significant. Section 59(1) makes a promoter who contravenes Section 3 liable to a penalty of up to ten percent of the estimated cost of the project, as determined by the Authority. Section 59(2) goes further: a promoter who does not comply with the Authority's orders under that sub-section, or continues to violate Section 3, is punishable with imprisonment of up to three years, or a fine of up to a further ten percent of the estimated project cost, or both.

For a buyer, the point is not the size of the penalty but what it signals. Registration is the gateway the law places before any marketing, so a project that is being sold without it has skipped the step that makes every other disclosure in this guide possible.

What must every property advertisement show?

Section 11(2) says the advertisement or prospectus issued or published by the promoter shall mention prominently the website address of the Authority, where all details of the registered project have been entered, and include the registration number obtained from the Authority, along with other incidental matters.

Those two items are your entry point. The registration number lets you find the project's own page on the regulator's website, and the Act requires the promoter to keep that page updated every quarter. Our guide on verifying a MahaRERA project registration shows how to search for a Mumbai project and what to read on its page.

If an advertisement shows neither a registration number nor the regulator's website, that is itself information. Either the project claims an exemption, which you can ask about, or the advertisement does not meet Section 11(2).

What can you claim if an advertisement or model flat misleads you?

Section 12 deals with the veracity of advertisements and prospectuses. Where a person makes an advance or a deposit on the basis of information in a notice, advertisement or prospectus, or on the basis of a model apartment, plot or building, and sustains loss or damage because of an incorrect or false statement in it, the promoter shall compensate that person in the manner provided under the Act.

The proviso gives a second option. If the person affected intends to withdraw from the project, they shall be returned their entire investment along with interest at the prescribed rate, and compensation in the manner provided under the Act.

The practical lesson is about proof. A claim made in a brochure you no longer have, or in a sample flat you did not photograph, is hard to establish years later. Keep the brochure, save the advertisement with its date, and photograph the model flat, including fittings and room sizes where they are shown. Area claims deserve special care, and our explainer on carpet area versus super built up area in Mumbai shows which area figure the law uses.

How should a Mumbai buyer read an ad before visiting the site?

Start with the registration number, not the price. If the number is there, look the project up and compare the regulator's page with the advertisement: the promoter's name, the project and phase name, the location and the proposed completion date should match. A mismatch is a question to put to the sales team in writing.

Next, separate what is represented from what is aspirational. A rendered view or a lifestyle image is marketing; a stated carpet area, a number of floors, a list of amenities or a completion date is a representation you can later hold the promoter to under Section 12.

Finally, check the phase. Because each phase is registered separately, an advertisement for a large Mumbai project may carry the registration of one phase while the flat you are offered sits in another. Ask which registration number covers your unit.

What should you do before paying a booking amount?

A short routine protects most buyers. Use this checklist:

1. Note the registration number and the regulator's website shown in the advertisement.
2. Look up the project and confirm the promoter, phase, location and completion date match.
3. Confirm which registration number covers the specific unit you are being offered.
4. Save every brochure, advertisement and message with the date you received it.
5. Photograph the model flat, including any displayed area, fittings and specifications.
6. If there is no registration number, ask in writing which exemption the promoter relies on.
7. Do not pay a token or booking amount for a project that needs registration but lacks it.

None of this slows a genuine purchase by more than an evening. It does turn the marketing you were shown into a record you can rely on if the flat you receive differs from the one you were sold.

What do Mumbai buyers ask about RERA and property ads?

Can a builder advertise a Mumbai project before RERA registration?

Not if the project requires registration. Section 3(1) of the RERA Act says no promoter shall advertise, market, book, sell or offer for sale, or invite persons to purchase in any manner, units in a real estate project in a planning area without registering it with the Authority first.

What must a RERA compliant property advertisement include?

Section 11(2) of the RERA Act says an advertisement or prospectus must prominently mention the website address of the Authority, where the registered project's details are entered, and include the registration number obtained from the Authority. Use that number to find and check the project's page.

What can I claim if a brochure or model flat was misleading?

Under Section 12, if you paid an advance based on an incorrect or false statement in an advertisement, prospectus or model flat and suffered loss, the promoter must compensate you. If you choose to withdraw, you get your entire investment back with prescribed interest, plus compensation.

Do all projects need RERA registration before advertising?

No. Section 3(2) exempts projects where land does not exceed 500 square metres or apartments do not exceed eight across phases, though the government can lower this, projects with a completion certificate before the Act began, and repairs or redevelopment without new sales.

Last updated 2026-10-17. PropNewz Team.