A buyer in north Bengaluru had booked a flat with a promised possession date, watched that date pass, and then watched a revised date pass too. The builder kept offering reassurance and no keys. What the buyer did not realise for months was that the promised date was recorded with the regulator, and that the delay itself gave him a formal remedy. Filing a complaint with the state real estate regulator is not a nuclear option reserved for lawyers, it is a structured process a buyer can start online, and knowing how it works changes the conversation with a builder entirely.

The short answer. If a builder breaks a promise that the real estate law protects, such as delaying possession beyond the registered date or deviating from the approved plan, you can file a complaint with the Karnataka Real Estate Regulatory Authority through its official portal. You register as a complainant, pay a filing fee that scales with your claim, attach your documents, and the authority hears the matter with a statutory target of 60 days. The trade off to understand is that real timelines can run longer than the target, but the process is far more accessible and cheaper than a civil suit.

What can you complain about?

You can complain when a builder breaches an obligation that the real estate law imposes, not merely when you are unhappy. The most common ground is delayed possession, where the builder fails to hand over by the date registered with the regulator. Other grounds include deviating from the approved plan or the specifications promised in your agreement, collecting more than the permitted booking amount without a registered agreement for sale, and failing to keep the required share of your money in a dedicated project account.

These grounds share a theme: they are promises the law made enforceable, not just marketing claims. That is why the first step in any complaint is to identify exactly which registered obligation was broken, because a complaint anchored to a specific breach and the registered project details is far stronger than a general grievance. Registered real estate agents who engage in unfair practices can also be the subject of a complaint.

Where and how do you file?

You file online through the official Karnataka regulator portal at rera.karnataka.gov.in, which has a complaint registration section. You first register as a complainant using your mobile number and email and your identity details, then complete the complaint form with the project and builder details and a clear statement of what went wrong and what you are seeking. You pay the filing fee online at submission and upload your supporting documents.

Because the whole process starts on the portal, keep your inputs precise. Name the registered project correctly, quote the registration number, and state your relief clearly, whether that is possession, interest for the delay, a refund or a correction of the deviation. A complaint that is specific about the breach and the remedy is easier for the authority to act on than one that simply describes frustration.

It also helps to file against the right party. Your complaint should name the promoter as recorded in the project registration, not just a project brand or a sales office, because orders are enforced against the registered entity. Where several buyers face the same delay in one project, they often coordinate, and while each files on their own facts, a consistent account of the same breach across complaints tends to move the matter along. Keep your own file focused on your booking, your payments and the promise that was broken to you.

What does it cost to file?

The filing fee is modest and scales with the size of your claim rather than being a flat charge. As a general pattern, smaller claims attract a fee of the order of a thousand rupees, mid sized claims a few thousand, and larger claims a somewhat higher fee, all payable online at the time you submit. Because fee schedules can be revised, confirm the exact amount for your claim band on the portal before you pay.

The right hand column is where most complaints are won or lost. A well documented complaint with the agreement, the payment record and the registered project details attached is far more persuasive than a strong argument with thin proof.

Which documents should you gather first?

Gather the documents that prove both your standing and the breach before you start the form. Your identity and address proof establish who you are, while your sale agreement or agreement for sale and your payment receipts establish that you are a buyer with money at stake. The registered project details, including the registration number and the registered possession date, tie your complaint to the specific obligation you say was broken.

Assemble these as clean, readable copies, because the authority and the builder will both scrutinise them. The registered agreement is especially important, since it records the promises on price, area and possession that the law will hold the builder to. If a promise you are relying on is not in the registered agreement, that is a gap worth understanding before you file.

What happens after you file?

Once your complaint is admitted, the authority notifies the builder, hears both sides and passes an order. The law sets a target of deciding complaints within 60 days, though in practice routine matters often take several months and complex ones longer, so treat the 60 days as the intended pace rather than a guarantee. The authority can direct the builder to hand over possession, pay interest for the delay, refund your money in appropriate cases, or correct a deviation.

If you are dissatisfied with the order, there is a further step. An appeal lies to the state real estate appellate tribunal, and it must generally be filed within 60 days of the order. Knowing that an appeal route exists is useful, but most buyers find that the regulator stage itself, with its structured hearing and enforceable orders, is where the matter is effectively resolved.

An order in your favour is not always the end of the road either, because enforcement can need its own follow up. If a builder ignores a direction to pay interest or hand over possession, the authority has powers to enforce its order, and you may need to pursue that enforcement step actively rather than assume compliance is automatic. Keeping copies of the order and every communication after it means you are ready to press for enforcement without having to reconstruct the history from memory.

How should a buyer use this remedy well?

Use it as a structured escalation, not a first reaction, and let the paper trail do the work. Before filing, put your grievance to the builder in writing and keep the response, because a documented attempt to resolve the issue strengthens your position and sometimes prompts the builder to act. When you do file, anchor the complaint to a specific registered obligation and the relief you want, and attach clean proof.

Keep your expectations realistic on timing while being firm on your rights. The process is designed to be accessible to ordinary buyers without a lawyer, though for a high value or complex matter, professional help can sharpen your case. This is buyer guidance on how the complaint mechanism works, not legal advice on your specific dispute, which depends on your agreement and facts.

A seven step RERA complaint checklist

1. Confirm the project is registered and note its registration number and possession date.
2. Identify the exact obligation the builder broke, such as delay or plan deviation.
3. Put your grievance to the builder in writing and keep the reply.
4. Gather identity proof, the agreement, payment receipts and project details.
5. Register as a complainant on rera.karnataka.gov.in and open a complaint.
6. State the breach and the relief you want clearly, and pay the fee online.
7. Track the matter, attend hearings, and note the 60 day appeal window if needed.

Following this order turns a stalled conversation with a builder into a documented case the regulator can act on. Before you buy, reduce the odds of ever needing this by following our guide to verifying a builder's track record and RERA complaints, and to understand what you can claim for a late handover, see our note on interest for delayed possession under RERA.

Where do I file a RERA complaint in Karnataka?

File online through the official Karnataka regulator portal at rera.karnataka.gov.in, which has a complaint registration section. Register as a complainant with your mobile, email and identity details, complete the complaint form with the project and builder details and the relief you want, pay the fee online, and upload your supporting documents.

What can I file a RERA complaint about?

You can complain when a builder breaches an obligation the law protects, such as delaying possession beyond the registered date, deviating from the approved plan or agreement, taking more than the permitted booking amount without a registered agreement, or failing to keep the required share of funds in escrow. Registered agents can also be complained against.

How long does a RERA complaint take?

The law sets a target of deciding complaints within 60 days, but in practice routine matters often take several months and complex cases longer. Treat the 60 days as the intended pace rather than a guarantee. If you disagree with the order, you can appeal to the state real estate appellate tribunal, generally within 60 days of the order.

What does it cost to file a RERA complaint?

The filing fee is modest and scales with your claim rather than being flat, with smaller claims attracting a lower fee and larger claims a higher one, all payable online at submission. Because fee schedules can be revised, confirm the exact amount for your claim band on the official portal before you pay.

Last updated 2026-07-15. PropNewz Team.