How to File a K-RERA Complaint Against a Builder in Karnataka

A Bengaluru buyer whose flat in Sarjapur was two years late, with the promised clubhouse quietly dropped, assumed her only option was an expensive court case. It was not. Under the real estate law, a buyer can file a complaint directly with the Karnataka Real Estate Regulatory Authority, online, for a nominal fee, and have it heard by the regulator rather than fighting through the ordinary courts. Knowing this route exists, and how to use it, is one of the most practical pieces of power a home buyer in Karnataka has.

The short answer. If a builder breaks the terms of your agreement, for example by delaying possession, changing the specifications, or refusing a due refund, you can file a complaint with the Karnataka Real Estate Regulatory Authority, or K-RERA, online at rera.karnataka.gov.in. The complaint is filed under Section 31 of the Real Estate (Regulation and Development) Act, 2016, with your agreement and payment records attached and a nominal fee. The trade-off to know: the process is buyer friendly and far cheaper than court, but it works only for a project that falls under the Act, so verify the project is registered first.

When can you file a K-RERA complaint?

You can file a complaint when a promoter or agent breaches the Act or the terms of your agreement, which covers most of the common grievances a buyer faces. Typical grounds include delayed possession beyond the committed date, changes to the sanctioned plan or the promised specifications without consent, a refusal to refund money that is due, and false or misleading statements in the marketing. If the builder has not done what the law and your agreement require, that is the situation the complaint mechanism exists for.

The mechanism works for projects that fall within the Act, which is why registration matters so much. A complaint about a registered project has a clear forum and a clear set of duties the promoter is bound by. If a project was never registered when it should have been, your position is weaker and different, which is one more reason to verify registration before you buy. For the rights themselves, our guide to Section 18 and delayed possession sets out what you can actually claim.

What can a K-RERA complaint achieve?

A complaint can achieve real remedies, not just an acknowledgement, which is what makes it worthwhile. Depending on your situation and the order, the authority can direct the promoter to comply with obligations, to hand over possession, or to pay interest for the period of delay. Where a project has failed to deliver, it can support your claim for a refund of the money you paid, together with interest, under the provisions of the Act.

For compensation specifically, the Act routes certain claims to an adjudicating officer, so the exact forum for a compensation amount can differ from a straightforward direction to comply. The practical point for a buyer is that the regulator has teeth: it can pass binding orders against a promoter, and there is an appellate tribunal above it if either side disagrees. This is a genuine enforcement route, not merely a complaints inbox.

It helps to be realistic about what a favourable order does and does not do. An order in your favour establishes your right and directs the promoter to act, but you may still have to press for execution if the promoter drags its feet. That is not a reason to avoid the route, since a binding order is a far stronger position than an unanswered email, but it is a reason to keep your expectations grounded and your records complete, so that enforcement, if needed, rests on a clear paper trail.

How do you file a complaint on the portal, step by step?

You file by registering on the official K-RERA portal and submitting your complaint with the supporting documents, all online. The process is designed to be usable by an ordinary buyer without a lawyer, though many still take advice for a serious dispute. Work through this checklist.

1. Open the official portal at rera.karnataka.gov.in and find the complaint registration option.
2. Register as a complainant using your mobile number and email, and verify the one time password.
3. Choose to file a complaint, selecting the option for a complaint under Section 31 of the Act.
4. Enter the project and promoter details, matching them to the registered project record.
5. Describe your grievance clearly and state the relief you are seeking, such as possession, interest, or a refund.
6. Upload your allotment letter, agreement, payment receipts, and identity documents.
7. Pay the nominal complaint fee, upload the payment proof, and submit to get an acknowledgement number.

Keep the acknowledgement number and copies of everything you upload, since you will need them through the hearings.

What documents and fee do you need?

You need the documents that prove your relationship with the project and the payments you have made, plus a nominal fee. The core set is your allotment letter, the builder buyer agreement, your payment receipts, and your identity or KYC documents. These establish that you are an allottee of the project and show what you paid and what was promised, which is the foundation of any complaint.

A nominal complaint fee applies, commonly stated as one thousand rupees, and you upload the payment challan as proof. Because fees and exact requirements can be updated, confirm the current fee and document list on the official portal before you file rather than relying on an old figure. Organising these documents well, in the order the portal asks for them, makes the filing smoother and your case clearer to the authority that will read it.

It is also worth writing your grievance in plain, specific terms rather than as a general complaint. State exactly what was promised, what actually happened, and what you want, tying each point to a document you have uploaded. A complaint that says the agreement promised possession by a stated date, that possession has still not been given, and that you seek interest for the delay, is far easier for the authority to act on than a broad expression of unhappiness with the builder.

K-RERA complaint or another forum: how to choose

A K-RERA complaint is usually the most direct route for a real estate grievance, but it is not the only forum, and it helps to see how it compares. The table below sets out the main options a buyer might consider.

What happens after you file?

After you file, your complaint is processed by the authority, which typically involves a hearing where both sides present their case. Hearings are often conducted through video conferencing, which spares you repeated trips, and the authority then passes an order. The framework is designed for reasonably quick disposal compared with ordinary litigation, though the exact time depends on the complexity of the case and the authority's schedule.

If the order goes against the promoter, they are expected to comply with its directions, and there is an appellate route if either party wishes to challenge the decision. For you as a buyer, the key is to keep your documentation tight and your relief clearly stated, so the authority can see exactly what you are asking for and why. A well organised complaint, grounded in your agreement, is far more persuasive than a general grievance.

What should a Bengaluru buyer remember?

The main thing to remember is that you are not powerless when a builder breaks its promises, because the law gives you a direct, affordable route to the regulator. A K-RERA complaint lets an ordinary buyer hold a promoter to account without the cost and delay of a full court case, provided the project falls under the Act. That single fact should change how you respond to a delay or a quietly dropped amenity.

It also underlines why the checks before you buy matter, since your strongest position comes from a registered project and a clear agreement. Keeping your paperwork in order from the start, including the specifications you were promised, makes any later complaint far easier to prove. Our guide to carpet area versus super built up area is a good example of the kind of detail worth recording, since area disputes are a common ground for complaint.

Frequently asked questions

Can I file a K-RERA complaint online myself?

Yes. You can register as a complainant on the official portal at rera.karnataka.gov.in, file a complaint under Section 31 of the Act, upload your agreement and payment records, pay the nominal fee, and submit it yourself. Many buyers do this without a lawyer, though taking advice is sensible for a serious or complex dispute.

What can I complain to K-RERA about?

You can complain about a promoter or agent breaching the Act or your agreement, such as delayed possession, changes to the sanctioned plan or specifications without consent, refusal of a due refund, or misleading claims. The mechanism works for projects that fall under the Act, so verify the project is registered as part of building your case.

How much does it cost to file a K-RERA complaint?

A nominal complaint fee applies, commonly stated as one thousand rupees, paid online with the challan uploaded as proof. Because fees can be revised, confirm the current amount on the official portal before you file. Even so, the cost is far lower than pursuing the same grievance through ordinary court litigation.

Do I need the project to be RERA registered to complain?

The complaint mechanism is built around projects that fall under the Act, so registration matters. A complaint about a registered project has a clear forum and a promoter bound by defined duties. If a project should have been registered but was not, your position is weaker and different, which is why verifying registration before buying is so important.

Last updated 2026-09-05. PropNewz Team.