Legal & Documents
What is a Completion Certificate?
The certificate that says they built what they were allowed to build. It is also, quietly, the thing that removes 5% GST from your purchase.
The short answer
A completion certificate confirms the building was constructed according to the approved plan — the right height, the right setbacks, the right FSI, no unauthorised additions.
It also has a consequence most buyers never notice: once it is issued, a sale of the flat attracts no GST. On a ₹1 crore flat, that is ₹5 lakh.
What a completion certificate confirms
That the building as constructed matches the building as approved. The authority inspects and checks:
- Height and number of floors — as sanctioned, not more
- Setbacks — the mandatory open space around the building
- FSI / FAR — the built area is within what was permitted
- Ground coverage
- Parking — provided as required
- No unauthorised construction — the extra floor, the covered setback, the terrace room
The GST consequence — worth ₹5 lakh
A flat sold before the completion certificate is issued attracts 5% GST (1% for affordable housing).
A flat sold after the completion certificate has been issued attracts no GST at all.
On a ₹1 crore flat that is ₹5 lakh — and it is the single most under-counted number in Indian home buying. It is a large part of why 'ready to move' is less expensive than its sticker price suggests.
Completion certificate vs occupancy certificate
They are not the same, and the difference matters.
The completion certificate says: you built what you were approved to build.
The occupancy certificate says: this building is fit for people to live in.
A building can be constructed exactly as approved and still not be fit to occupy — no working fire system, no sewage connection, lifts not commissioned. The OC is the one that lets you legally move in.
In some states the two are combined into a single document. In others they are separate. Ask which applies where you are buying.
How to check
- Ask to see the certificate. The document.
- Verify the number with the local authority.
- Check the RERA filing — it should be uploaded there.
- Check it covers your tower. Large projects get certificates tower by tower, or phase by phase.
- Then ask about the OC. The completion certificate is necessary, but it is not the one that lets you move in.
The three certificates
| Commencement Certificate (CC) | Completion Certificate | Occupancy Certificate (OC) | |
|---|---|---|---|
| When issued | Before construction starts | After construction finishes | After the completion certificate |
| What it says | The builder may lawfully begin building, to the sanctioned plan | The building was constructed according to the approved plan | The building is fit for human occupation |
| Who issues it | The local planning authority | The local authority | The local authority |
| What it permits | Construction | Nothing, by itself | You to legally move in |
| Checks | Land title, plan approvals, NOCs | Built as per plan, setbacks, height, FSI | Fire safety, water, sewage, electricity, lifts, structural safety |
| If it's missing | The project is illegal from the start. Walk away. | The building may deviate from the sanctioned plan. | Moving in is unlawful. No legal utility connections. Loans and resale become difficult. |
| The one to demand | Yes — before you buy off-plan | Yes | YES. This is the one. |
In some states the CC and OC are combined into a single document. In others they are separate. Ask which applies where you are buying — and then ask to see the actual document, not a promise of one.
Frequently asked questions
What is a completion certificate?
A certificate from the local authority confirming that a building was constructed according to the approved plan — correct height, setbacks, FSI, ground coverage, parking, and no unauthorised additions.
Is a completion certificate the same as an occupancy certificate?
No. The completion certificate says the building was built as approved. The occupancy certificate says it is fit to live in — fire safety, water, sewage, lifts, structural safety. A building can be exactly as approved and still not be fit to occupy. In some states they are combined; in others they are separate.
Does a completion certificate affect GST?
Yes, significantly. A flat sold before the completion certificate is issued attracts 5% GST. A flat sold after it has been issued attracts no GST at all. On a Rs 1 crore flat that is Rs 5 lakh — the single most under-counted number in Indian home buying.
Can a completion certificate be issued for one tower only?
Yes. Large projects are often certified tower by tower or phase by phase. Check that the certificate you're shown actually covers the tower your flat is in.