In the spring of 2026 a buyer touring a half built tower in Chembur, Mumbai, asked the sales manager a simple question: can I see the CC. The manager smiled, produced a thick file, and slid across a letter titled Intimation of Disapproval. The buyer, reasonably, thought disapproval meant the project had been refused and nearly walked out. In fact that letter was a routine and important step, and the document he actually wanted sat a stage later in the process. In Mumbai, the paperwork behind a flat has its own vocabulary, and knowing it protects you from both false alarms and real risks.

The short answer. Two approvals sit behind a Mumbai flat before it is even built: the Intimation of Disapproval, or IOD, which is a conditional consent listing what the builder must satisfy, and the Commencement Certificate, or CC, which is the permission to actually build, issued by the municipal corporation. A buyer should confirm both exist for the project and match it. The trade-off to accept: seeing an IOD and CC tells you the project cleared its build stage approvals, but it does not by itself certify the finished building is fit to occupy, which is the job of the occupancy certificate later.

What is an IOD in Mumbai?

An Intimation of Disapproval, despite its discouraging name, is a normal early approval document in Mumbai, not a rejection. It is issued by the municipal authority, the Brihanmumbai Municipal Corporation, also known as MCGM or BMC, and it sets out the conditions a builder must satisfy before construction can move forward. Think of it as a conditional consent: it lists the obligations, no objection certificates and requirements that must be met, and it signals that the plans can proceed once those conditions are fulfilled.

For a buyer, the name is the trap and the content is the value. Many first time buyers hear disapproval and assume the worst, when the document is actually part of the standard path to permission. What matters is not the title on the letter but whether the project has the IOD and is working through or has cleared its conditions. If a seller cannot produce it at all for a project under construction, that absence is more telling than the alarming name ever is.

What is a Commencement Certificate and how does it differ from the IOD?

The Commencement Certificate is the permission to actually begin construction, and it is the document the Chembur buyer really wanted. Where the IOD is a conditional consent listing what must be done, the CC is granted once the relevant conditions are met and confirms the builder may construct as per the approved plans. In Mumbai the CC is often issued in stages, with an early certificate up to the plinth level and a further certificate for the superstructure above, so the version you see should match how far the building has progressed.

That staged nature is why a buyer should read the CC against the actual construction. A CC limited to the plinth does not authorise ten floors of tower, so a mismatch between the certificate and the height rising on site is a question worth asking. The IOD tells you the project entered the approval pipeline; the CC tells you it was cleared to build, and to what extent. Together they describe the legal footing of the construction you are being sold.

Why do IOD and CC matter to a flat buyer?

They matter because they separate a properly approved project from one being sold ahead of its permissions. A project that holds a valid IOD and a CC covering the construction underway has passed the municipal checks that let building begin, which reduces the risk of stop work notices, disputes and stalled handovers landing on you. Buying into a tower that is rising without the matching CC exposes you to exactly those problems, and the buyer, not the builder, usually feels them first.

There is also a financing angle. Lenders and your own lawyer will want to see the approval trail, and gaps in it can slow or complicate a home loan. Confirming the IOD and CC early is a low cost step that either gives you confidence or surfaces a problem while you can still walk away. It is far easier to ask for these documents before booking than to chase them after your money is committed.

What should a buyer check on the IOD and CC?

Check that the documents exist, match the project, and cover the stage of construction you can see. The single most useful habit is to line up the CC against the building on site, so that the permitted extent and the actual height agree. A certificate that names a different plot, or authorises far less than what is being built, is a reason to slow down and get written clarification before you proceed.

How do IOD, CC and OC fit together across construction?

These documents mark a sequence from plan to occupation, and each answers a different question. The IOD comes early as a conditional consent, the CC follows as the permission to build and is issued in stages, and the occupancy certificate comes at the end to confirm the finished building was constructed per the approved plans and is fit to occupy. Seeing one does not answer for the others, which is why a careful buyer tracks all three at the right moments.

For an under construction flat, the IOD and CC are what you verify now, while the occupancy certificate is something you confirm before final possession. For a ready building, you would expect the full set, ending in the occupancy certificate. Keeping the three in order in your mind stops a builder from using an early document to answer a question that only a later one can settle.

What if the builder cannot show a valid CC?

If a project is being constructed without a Commencement Certificate that covers the work, treat it as a serious risk, not a formality to sort out later. Construction ahead of the required permission can attract stop work action and legal complications that ripple down to buyers, and a certificate that does not match the stage on site raises the same concern. Ask in writing for the CC and an explanation, and do not accept a verbal assurance that it is coming.

Where the documents are missing, mismatched or out of date, bring in your own lawyer before committing any money. A builder confident in a clean approval trail should share the IOD and CC without resistance, so reluctance is itself information. The cost of pausing over a doubtful approval is almost always lower than the cost of untangling one after you have paid.

How does this fit with the rest of your Mumbai due diligence?

IOD and CC cover the build stage, and they work best beside the registration, RERA and occupancy checks. Confirming the project is registered, that the land and title are clean, and that the finished building will carry an occupancy certificate rounds out the picture that IOD and CC begin. No single document makes a flat safe to buy; it is the set of them, read in sequence, that gives you real confidence.

Pair this with our guide on the occupancy certificate a Mumbai flat buyer must check, and our explainer on how to verify a MahaRERA project before booking. Read together with an IOD and CC check, those cover approval to build, registration, and fitness to occupy across the life of the project.

Your seven step IOD and CC checklist

1. Ask the builder in writing for the IOD and the Commencement Certificate for the project.
2. Confirm the documents name the exact plot and project you intend to buy into.
3. Check the stage the CC covers, such as plinth or superstructure, against the height on site.
4. Read the IOD conditions and ask how each has been satisfied.
5. Confirm the issuing authority is the Brihanmumbai Municipal Corporation.
6. Keep dated copies of what you were shown with your purchase file.
7. If anything is missing or mismatched, get a lawyer's review before paying.

Frequently asked questions

Does Intimation of Disapproval mean the project was rejected?

No. Despite the name, an Intimation of Disapproval is a routine early approval document in Mumbai, issued by the municipal corporation. It is a conditional consent that lists the conditions and no objection certificates a builder must satisfy before construction moves forward. The document is part of the standard path to permission, not a rejection.

Is the Commencement Certificate the same as the IOD?

No. The IOD is a conditional consent that lists what must be satisfied, while the Commencement Certificate is the actual permission to begin construction once those conditions are met. In Mumbai the CC is often issued in stages, first up to plinth level and then for the superstructure, so it should match how far the building has progressed.

Can I rely on the CC instead of the occupancy certificate?

No. The Commencement Certificate authorises construction, but it does not certify that the finished building is fit to occupy, which is the role of the occupancy certificate issued after completion. For an under construction flat you verify the IOD and CC now, and confirm the occupancy certificate before final possession. Each document answers a different question in the sequence.

What should I do if construction is ahead of the CC stage?

Treat a mismatch between the CC stage and the height on site as a serious question, not a detail. A plinth level certificate does not authorise a full tower, and building ahead of permission can invite stop work action. Ask the builder in writing for the certificate covering the work, and have your lawyer review it before you commit.

Last updated 2026-07-16. PropNewz Team.