Occupancy Certificate (OC) vs Completion Certificate (CC): What Every Homebuyer Must Know
Dasadia Editorial Team · Updated June 2026
You have verified the RERA registration, checked the title, and you are ready to take the keys. There is one last pair of documents standing between you and safe ownership: the Completion Certificate (CC) and the Occupancy Certificate (OC). They sound similar, and many buyers treat them as the same thing — but they are not. One certifies that the building was built correctly; the other certifies that you are legally allowed to live in it. Confusing them, or skipping the OC, can leave you in a flat you technically cannot occupy.
This guide explains exactly what each certificate is, who issues them, how they differ, what can go wrong if either is missing, and how to check them online before you accept possession — with the Mumbai and Maharashtra rules spelt out.
Key Takeaways
- A Completion Certificate (CC) confirms the building was constructed as per the approved plans and building codes; an Occupancy Certificate (OC) confirms it is safe and legally fit to live in.
- Both are issued by the local municipal authority — the BMC in Mumbai — and the CC normally comes first, followed by the OC.
- The OC is the more important document for you as a resident: permanent water, electricity and sewage connections, home loans and resale all hinge on it.
- Under RERA in Maharashtra, a builder cannot legally hand over possession without the Occupancy Certificate.
- You can check whether the OC has been issued free on the MahaRERA project page, under the uploaded documents.
- Moving in without an OC means you are technically an unauthorised occupant and exposed to penalties, utility and resale problems.
What Is a Completion Certificate (CC)?
A Completion Certificate is an official document issued by the local municipal or planning authority confirming that a building’s construction is complete and has been carried out in accordance with the sanctioned plans, approved layout and applicable building codes. In effect, it certifies the structure: the height, setbacks, floor-space and design match what was approved, and the building is structurally sound. Without a CC, a building can be treated as an unauthorised or illegal construction, exposing it to penalties or worse.
Importantly, a CC says the building is finished correctly — it does not, on its own, grant anyone permission to move in. That permission is the job of the Occupancy Certificate.
Source: Brigade Group · Inframantra
What Is an Occupancy Certificate (OC)?
An Occupancy Certificate is the document the municipal authority issues confirming that a completed building is fit for human habitation and may legally be occupied. Before granting it, the authority verifies that essential services and safety systems are in place — water supply, sewage and drainage, electricity, a fire-safety No Objection Certificate (NOC), lift clearance and structural compliance with the sanctioned plan. In Mumbai the OC is issued by the Brihanmumbai Municipal Corporation (BMC) under the Development Control and Promotion Regulations for Greater Mumbai, 2034, framed under the Maharashtra Regional and Town Planning Act, 1966. Occupying a building without an OC is, strictly, not legal.
Source: Lawgic · The Realty Today
Who Issues Them, and In What Order
Both certificates come from the same place: the local municipal corporation or planning authority for the area. In Mumbai that is the BMC; elsewhere in the metropolitan region it may be the relevant municipal corporation or a special planning authority. The sequence matters. Once construction is finished, the developer’s architect or licensed surveyor first submits the building-completion documents and the authority accepts completion (the CC stage). The OC is then applied for and granted on top of that, after the authority is satisfied that services and safety requirements are met. So a project can, briefly, have its construction certified complete while the OC is still pending — which is exactly the gap buyers need to watch.
Source: Lawgic · Tigde Law Firm
Why OC and CC Matter for Buyers
These are not just files for the builder’s records — they directly protect your money and your right to live in the home:
- Legal occupation: the OC is the only document that confirms you can lawfully live in the flat.
- Permanent utilities: water, electricity and sewage connections are typically sanctioned only once the OC is issued.
- Home loans: many banks require a valid OC/CC before disbursing or refinancing a loan against the property.
- Resale value: flats with a clear OC and CC command better prices and sell faster; buyers (and their banks) ask for them.
- Safety assurance: the OC confirms fire safety, drainage and structural checks have passed.
- Society conveyance: a clean certificate trail is needed when the building is handed over to the housing society.
Source: NoBrokerHood · Tigde Law Firm
What Happens If You Move In Without an OC
Taking possession without a final, unconditional OC is not simply ‘moving in early’ — it transfers real risk to you:
- You are technically an unauthorised occupant, and the municipal corporation can impose penalties or use-and-occupation charges.
- Unauthorised portions of a building can, in serious cases, face demolition orders.
- You may only get a temporary utility connection (often on an indemnity bond at a higher tariff); permanent meters need the OC.
- Banks may refuse a home loan or balance transfer until OC status is confirmed.
- Resale and society conveyance become difficult, and the flat's value suffers.
Source: RightToInformation.wiki · Rustomjee
How to Check OC and CC Online
For a RERA-registered project in Maharashtra, the quickest way to verify is the MahaRERA portal:
- Step 1 — Go to the official MahaRERA portal and open the 'Registered Projects' search.
- Step 2 — Search by the project's RERA registration number, name or location, then open 'View Details'.
- Step 3 — Scroll to the 'Uploaded Documents' section of the project page.
- Step 4 — Look for the Occupancy Certificate (and completion documents); if uploaded, you can view and download them.
- Step 5 — Cross-check the building details on the certificate against the flat you are buying, and confirm it is a final OC, not a part/provisional one.
You can also approach the issuing municipal authority (the BMC in Mumbai) directly to confirm a certificate’s authenticity.
How a Builder Obtains the OC
Understanding the process helps you ask the right questions. After construction is complete, the developer — through a licensed architect or surveyor — applies to the municipal corporation, attaching documents such as the architect’s completion drawings, a structural stability certificate, the fire-safety NOC and the lift inspection report. The authority then inspects the building and, if everything complies, issues the OC — typically within about 21 to 30 days of a complete application. In Mumbai, applications are filed through the BMC’s online building-approval system. If the building does not comply (for example, due to unauthorised deviations from the sanctioned plan), the OC can be refused, with the reasons communicated in writing.
Source: RightToInformation.wiki · Lawgic
Part-OC and Part-CC Explained
In large, phased towers — common in Mumbai — the authority may issue a Part-Occupancy Certificate (or part-completion certificate) floor-wise or wing-wise, allowing lower or completed floors to be occupied while construction continues elsewhere. A Part-OC is legitimate, but it is conditional and usually backed by an indemnity from the developer. The key point for buyers: confirm whether the OC covering your specific floor or wing has been granted, and whether all the promised amenities and services are actually in place — a Part-OC for one wing does not cover the whole project.
Source: RightToInformation.wiki · Lawgic
OC, CC and Your Rights Under RERA
RERA strengthened the buyer’s hand here. In Maharashtra, a developer cannot legally hand over possession of a flat without first obtaining the Occupancy Certificate. If a builder offers possession — or claims delay-interest — without a valid OC, you are entitled to resist taking possession on those terms. If the OC is being withheld or delayed, your options include sending a formal legal notice, filing a complaint against the developer on the MahaRERA portal, approaching the consumer forum for compensation, and filing an RTI with the municipal authority to learn why the OC has not been issued.
Source: Tigde Law Firm · Mumbai Home Expert
Verified Key Facts
- CC certifies construction per approved plans; OC certifies fitness to occupy: Verified (Brigade; NoBrokerHood).
- Both are issued by the local municipal authority (BMC in Mumbai): Verified (Lawgic; Mumbai Home Expert).
- In Mumbai the OC is issued under DCPR for Greater Mumbai, 2034 (under the MRTP Act, 1966): Verified (Lawgic).
- Permanent water, electricity and sewage connections generally require the OC: Verified (NoBrokerHood; RightToInformation.wiki).
- Under RERA in Maharashtra, possession cannot be handed over without the OC: Verified (Tigde Law Firm).
- OC is typically issued within about 21–30 days of a complete application: Verified (RightToInformation.wiki).
Frequently Asked Questions
A Completion Certificate (CC) confirms that the building was constructed in line with the approved plans and building codes — it certifies the structure. An Occupancy Certificate (OC) confirms the building is safe and legally fit to live in, with services and safety systems in place — it grants permission to occupy. The CC normally comes first, the OC after.
The Brihanmumbai Municipal Corporation (BMC) issues the OC in Mumbai, under the Development Control and Promotion Regulations for Greater Mumbai, 2034, framed under the Maharashtra Regional and Town Planning Act, 1966.
No. Occupying a building without an Occupancy Certificate is technically unlawful. You become an unauthorised occupant and risk municipal penalties, problems getting permanent utilities, and difficulties with home loans and resale.
Under RERA in Maharashtra, a developer cannot legally hand over possession without first obtaining the OC. If a builder offers possession without a valid OC, you can refuse on those terms and raise the issue with MahaRERA or the consumer forum.
For a RERA-registered project, search it on the MahaRERA portal, open ‘View Details’, and look in the ‘Uploaded Documents’ section for the Occupancy Certificate. You can also confirm authenticity with the issuing municipal authority.
Both matter, but the OC is the more critical document for a resident because it is what legally permits occupation and unlocks permanent utility connections, home loans and smooth resale. The CC certifies the construction itself.
A Part-Occupancy Certificate is issued floor-wise or wing-wise for large, phased projects, allowing completed portions to be occupied while construction continues elsewhere. Confirm that the part-OC covers your specific floor or wing.
Many banks ask for a valid OC (and often the CC) before disbursing or transferring a home loan against a completed property, as part of their legal and technical due diligence.
After a complete application with all required documents and inspections, the municipal authority typically issues the OC within about 21 to 30 days. Deviations from the sanctioned plan can cause refusal or delay.
The developer’s architect generally submits completion drawings, a structural stability certificate, the fire-safety NOC and the lift inspection report, among other approvals, when applying to the municipal authority.
You can send a legal notice, file a complaint against the developer on the MahaRERA portal, approach the consumer forum for compensation, and file an RTI with the municipal authority to learn why the OC has not been issued.
An OC is generally a one-time certificate confirming the building was fit for occupation at the time of issue. Issues usually arise not from expiry but from never having obtained a valid OC, or from a part-OC that does not cover the whole building.
Conclusion and Next Steps
The Completion Certificate and Occupancy Certificate may sound interchangeable, but they protect two different things: one says the building was built right, the other says you can legally live in it. For a homebuyer, the OC is the document that truly matters at possession — it underpins your right to occupy, your utilities, your loan and your future resale.
Next step: before you accept possession, insist on seeing the final, unconditional Occupancy Certificate, check it on the MahaRERA project page or with the BMC, and match every detail against your flat. If only a part-OC exists, confirm it covers your unit. When in doubt, have a lawyer review the certificate before you sign.
Sources and References
- MahaRERA — official portal (check uploaded OC/CC)
- Brihanmumbai Municipal Corporation (BMC / MCGM)
- Lawgic — Occupancy Certificate in Mumbai (DCPR 2034 / MRTP Act)
- Tigde Law Firm — Occupancy Certificate Maharashtra process
- RightToInformation.wiki — how to apply for an OC (2026)
- Rustomjee — how to check Occupancy Certificate online
- 99acres — importance of OC and CC
- Brigade Group — OC vs CC explained
- NoBrokerHood — OC vs CC
- Mumbai Home Expert — OC vs CC for Mumbai buyers
Disclaimer
This article is for informational purposes only and does not constitute legal advice. Rules, procedures and timelines for Completion and Occupancy Certificates are indicative as of June 2026 and may vary by municipal authority and change over time. Always verify a project’s OC and CC directly with the issuing authority (the BMC in Mumbai) or on the official MahaRERA portal, and consult a legal professional before finalising any property transaction.
Buying a Home in Andheri East?
153 East by Dasadia Developers LLP is a MahaRERA-registered (PR1180002502968) residential project in J.B. Nagar, Andheri East, offering 1–4 BHK homes. Get the brochure with floor plans and details, or arrange a site visit — and verify every approval and document on the official MahaRERA portal before you decide.
