A Bengaluru buyer had waited two years past his promised possession date, with each call to the builder ending in a fresh excuse. He felt powerless, until a friend pointed out that the state real estate regulator exists precisely for moments like this, and that filing a complaint was a structured process he could start himself, online, for a modest fee. Within weeks he had a complaint number, a scheduled hearing, and something he had lacked for two years: a forum where the builder had to answer. This guide explains how a home buyer files a complaint with the Karnataka real estate regulator and what to expect after.

The short answer. If a builder or agent has not honoured its obligations, an aggrieved buyer can file a complaint with the Karnataka real estate regulator online, through the official portal, for a filing fee of one thousand rupees. You register an account, enter the project and builder details and the facts of your grievance, and upload supporting documents such as your agreement and payment receipts. The trade off to understand is that the process rewards preparation: a complaint backed by clear documents and a specific, factual account is far stronger than a vague grievance, so gathering your paperwork first is time well spent.

When can a buyer file a complaint with the regulator?

A buyer can approach the regulator when a promoter or agent has failed to meet an obligation under the real estate law, such as a long delay in possession, a departure from what was promised, or a breach of the terms recorded for a registered project. The regulator was created to give buyers a dedicated forum rather than leaving them to the slower general courts, so the complaint route is meant to be accessible to an ordinary buyer acting on their own. For this to work, the project should be one that falls within the regulator's remit, which is why knowing the project's registration status matters before you file. A complaint anchored to a registered project, with a clear account of which obligation was not met, sits on the firmest ground.

It helps to be specific about what you are seeking. The regulator handles grievances tied to the obligations the law places on promoters and agents, so framing your complaint around a concrete failure, with dates and documents, is more effective than a general expression of dissatisfaction. Clarity about the outcome you want also helps you present your case cleanly at the hearing stage.

It is also worth trying to resolve the matter directly with the builder first, in writing, before you file. A clear written request that sets out the problem and asks for a specific remedy sometimes brings a resolution on its own, and even when it does not, that written trail becomes useful evidence. The regulator is there for when good faith efforts have not worked, and arriving with a record of your attempts to settle the matter reasonably tends to strengthen rather than weaken your position.

How do you file a complaint online?

You file through the official Karnataka real estate regulator portal, which works on both a computer and a phone. According to Bajaj Finserv's guide to filing complaints with RERA Karnataka, the process begins with registering an account and verifying your email to set a password, after which you log in to the complaint section. You then provide the project and builder details, describe the nature of your complaint, and upload the supporting evidence as PDFs, including your agreements and payment proofs. The filing fee is one thousand rupees, paid online. Once you submit, you receive a complaint number that lets you track the matter as it progresses. Because fees and portal steps can be revised over time, it is sensible to confirm the current fee and the exact process on the official portal at the moment you file.

Filing yourself, rather than through an intermediary, keeps you close to your own case and its documents. Many buyers handle the filing on their own and bring in a lawyer only if the matter becomes complex or moves to appeal, which keeps costs proportionate to the dispute.

Take care when you write the facts of your complaint. Stick to what you can show with documents and dates, describe what was promised and what happened, and avoid sweeping characterisations that you cannot support. A calm, specific account is more persuasive to a regulator than an angry one, and it also protects you, since a complaint built on verifiable facts is far harder to dismiss. Think of the narrative as a summary of your evidence rather than an outlet for your frustration.

What documents do you need for a complaint?

The strength of a complaint rests heavily on the documents you attach, so gather them before you begin. You will want the sale agreement or the builder buyer agreement, the receipts for the payments you have made to the builder, and the record of your communications, such as emails or letters, that show what was promised and what went wrong. You should also have the project's registration number, which ties your complaint to the specific registered project. Assembling these first does two things: it makes the online filing quick, since you can upload as you go, and it makes your case concrete, because a regulator weighs evidence rather than assertion. A well organised bundle of documents often does more for your complaint than the strongest words.

Organise the bundle in a way a reader can follow. Keep the agreement, the receipts in date order, and the correspondence together, and label each clearly so the connection between a promise and a payment is easy to see. When the person deciding your case can move from document to document without confusion, your account becomes their account, which is exactly the position you want to be in before a hearing.

What happens after you file?

After you file, the matter moves through a defined sequence rather than disappearing into a void. The builder is notified of the complaint, a hearing is scheduled where both sides present their arguments, and the regulator reaches a decision based on the evidence. If you are not satisfied with the outcome, there is a further route of appeal to the appellate tribunal. The table below sets out the broad stages so you know what to expect.

Knowing the shape of the process helps you stay patient through it. A hearing can take time to schedule, and a matter may involve more than one sitting, so it is normal for a complaint to run over weeks or months rather than resolve overnight. Keeping your complaint number handy, responding promptly to any communication, and turning up prepared for each hearing are the practical habits that keep your case moving.

How does a complaint fit with your other RERA protections?

Filing a complaint is one part of the wider protection the real estate law gives a buyer, and it works best when you have used the other parts along the way. Before you buy, verifying the project on the register gives you the registration number you will need if a dispute ever arises, so our guide to how to verify a RERA registration in Bengaluru is a natural first step. And because a delay in possession is one of the most common reasons buyers turn to the regulator, our note on the remedies for delayed possession available to Bengaluru buyers explains what you can seek in exactly that situation. Read together, they turn the complaint process from a last resort into an informed step you can take with confidence.

The broader point is that these protections reward the buyer who keeps good records from the start. The agreement you file away, the receipts you keep, and the registration number you noted at the outset are precisely what a complaint needs later, so treating your paperwork carefully throughout your purchase is itself a form of protection.

A seven step checklist to file a K-RERA complaint

Work through these steps if you need to approach the regulator.

1. Confirm the project is registered and note its registration number.
2. Gather your sale agreement or builder buyer agreement and all payment receipts.
3. Collect your emails and letters with the builder that show what was promised.
4. Register an account on the official Karnataka real estate regulator portal.
5. Enter the project and builder details and a clear, factual account of your grievance.
6. Upload your documents as PDFs and pay the filing fee online.
7. Note your complaint number, track the matter, and prepare for the hearing.

Common questions from Bengaluru buyers

How do I file a RERA complaint in Karnataka?

You file online through the official Karnataka real estate regulator portal. Register an account, verify your email, and log in to the complaint section, then enter the project and builder details and the facts of your grievance, and upload your agreement and payment proofs. The filing fee is one thousand rupees, paid online.

What is the fee to file a RERA complaint in Karnataka?

The filing fee is one thousand rupees, paid online through the portal. Because fees and the exact process can be revised over time, it is sensible to confirm the current fee on the official portal at the moment you file, so you are not caught out by a change between reading about it and actually submitting.

What documents do I need for a RERA complaint?

You will need the sale agreement or builder buyer agreement, receipts for payments made to the builder, and the record of your communications with the builder, such as emails or letters. You should also have the project's registration number. Gathering these before you file makes the process quicker and your case stronger.

What happens after I file a RERA complaint?

The builder is notified of your complaint, a hearing is scheduled where both sides present their arguments, and the regulator decides based on the evidence. You receive a complaint number to track the matter. If you are not satisfied with the outcome, there is a further route of appeal to the appellate tribunal.

Last updated 2026-07-21. PropNewz Team.