14 Must-Verify Documents & Checks Before Buying a Flat in Delhi NCR (2026 Buyer's Checklist)

This checklist exists because every year we meet two or three buyers who have lost somewhere between ₹50 lakh and ₹1 crore to paperwork they didn't verify. Not to a fraudster in a dark alley — to a polite-looking builder, a helpful broker, or a cousin's recommendation. NCR property law is recoverable if you check the right documents before you sign, and almost unrecoverable if you don't. Here's the full list.

Why this checklist, not a shorter one

You will hear "just check RERA and sale deed, bhai". That is not enough. A clean RERA registration doesn't mean the society isn't under litigation. A pretty sale deed doesn't mean the title chain is clean going back 30 years. A bank loan approval doesn't mean the OC has actually been issued. Every item below exists because a specific, common failure mode in NCR bypasses the others.

Read this once end-to-end before you start flat-hunting. Then run the list on each shortlisted property.

The 14 documents and checks, in the order we run them

1. Parent title chain — minimum 30 years

Trace every previous owner back 30 years. If records before 1995 aren't available, 12 years is the legal fallback, but anything short of 30 leaves meaningful risk. Look for uninterrupted transfers, consistent names, and no "agreement to sell" gaps masquerading as ownership.

2. Encumbrance Certificate (EC)

An EC shows every registered charge against the property. You want "nil encumbrances" for the last 13 years at minimum, 30 years ideally. For UP properties (Noida, Greater Noida, Ghaziabad), pull this online from IGRSUP (igrsup.gov.in). For Delhi and Gurgaon, use the state sub-registrar portals.

3. Sale Deed + Mother Deed

The Sale Deed is the current transfer document. The Mother Deed is the original instrument that established title — often a plot allotment letter from DDA / NOIDA / GNIDA / GDA / HUDA. Both must be clean, stamped, and registered. If the seller cannot produce the Mother Deed, the chain is broken; walk away.

4. Khata / mutation records

Mutation transfers the municipal record of ownership after every sale. An un-mutated property means the last transfer was never recorded with the local body — which means unpaid property tax and a title that looks clean on paper but isn't recognised by the municipality. Demand a current mutation certificate in the seller's name.

5. Occupancy Certificate (OC) — non-negotiable for ready-to-move

The OC is issued by the local authority (GDA, NOIDA, GNIDA, DDA, MCG) certifying the building meets approved plans and is fit for occupation. No OC means no legal occupancy. Banks will still fund OC-less flats in some cases, but utility connections, resale, and society handover all get harder. For any ready-to-move purchase, missing OC is walk-away territory.

6. Completion Certificate (CC)

Separate from OC and often confused with it. CC certifies construction is complete per the sanctioned plan. Most authorities issue OC only after CC. If the seller has OC, they have CC — but ask for both.

7. Approved building plan

The sanctioned building plan from the relevant authority (GDA / NOIDA / GNIDA / DDA / HUDA). Cross-check floors, setbacks, and common area against what's actually built. Unauthorised construction shows up here — an extra floor, a covered balcony, a converted common area. If the building doesn't match the plan, the gap is illegal and may be demolishable.

8. Latest 3 years of property tax receipts

Unpaid property tax transfers to the new owner. Ask for three years' receipts, paid in the seller's name, and cross-check the property ID against the khata record.

9. Latest electricity and water bills

In the seller's name, paid current. These serve two purposes — they confirm possession and surface any large arrears. Also confirm the sanctioned load matches what the flat actually uses.

For co-operative housing societies, the share certificate is the legal ownership proof within the society. Required for the society to recognise the transfer.

11. Society NOC and No-Dues Certificate from the RWA

Society dues legally transfer to the new owner. A ₹2 lakh outstanding maintenance bill becomes yours the day the sale deed registers. Demand a signed No-Dues from the RWA and a formal NOC for the transfer. While you're at it, ask the RWA secretary whether the society has any ongoing litigation — builder dispute, land title dispute, elevator compliance — the answers are usually candid.

12. RERA registration

Search the project yourself on UP-RERA (up-rera.in), HARERA (haryanarera.gov.in), or Delhi RERA. Verify the registration number, completion timeline, promoter details, and any open complaints. A project with open RERA complaints from existing allottees is a structural warning. Read our RERA verification guide for a walk-through.

13. Commencement Certificate (for under-construction projects)

Issued before construction begins. If you're buying pre-launch or under-construction, the CC proves the builder had legal authority to start. Pre-CC "soft launches" are risk-loaded — pricing is attractive, but cancellation and delay risk is disproportionate.

14. Bank-approved project list sanity check

If SBI, HDFC, LIC Housing Finance, or ICICI have pre-approved a project for home loans, their legal teams have already vetted the title chain and documentation. This is not a substitute for your own diligence — but a project on zero major lenders' approved lists should make you ask why.

Freehold vs leasehold — the note most NCR buyers miss

Most Delhi property is freehold. Most Noida, Greater Noida, and YEIDA stock is leasehold — the Authority retains ultimate title and grants a 90-year lease. Implications:

Annual lease rent is payable to the Authority. Arrears transfer to the new owner.
Transfer requires Authority permission and attracts transfer charges (typically 1–2.5% of circle rate).
Resale paperwork is heavier — factor 45–90 days for transfer clearance.
Freehold conversion is available in Ghaziabad and parts of Noida for a fee; worth exploring post-purchase if you intend to hold 10+ years.

Leasehold isn't bad — it's just different. Price it in.

Stamp duty in UP (Ghaziabad, Noida, Greater Noida)

Men: 7% of circle rate or deal value, whichever is higher
Women: 6% (if registered in wife's name, for property under ₹1 Cr)
Joint (men + women): 6.5%

Registering in your spouse's name is the single largest legal tax saving available. On a ₹80 lakh flat, that's ₹80,000 saved — more than most brokers' fees.

Red flags that mean walk away

These aren't "negotiate harder" signals. These are "thank the seller and leave" signals.

No OC in a ready-to-move flat older than 3 years
Disputed khata or pending mutation
GPA (General Power of Attorney)-only sale with no registered sale deed
Active RERA complaints from multiple existing allottees
Society under litigation for builder handover or title
Seller cannot produce Mother Deed
Tax receipts missing for more than 2 years
Bank valuation significantly below quoted sale price (loan LTV will crater)
Approved plan doesn't match built structure — any discrepancy

How 9 Property Wala handles this for you

Every property we represent goes through this 14-point check before it hits our client shortlist. We pull the EC ourselves, we verify OC and CC with the issuing authority, we sit with the RWA secretary before recommending the society, and we walk the approved plan against the physical build. If a property doesn't clear, you never hear about it — which is the point. Read our Indirapuram micro-market diligence notes for how we apply this at neighbourhood level.

Bottom line

Never rely solely on the broker's paperwork packet. Demand originals, run your own searches.
EC and OC are the two documents that catch 80% of bad deals. Get them first, not last.
Register in the woman of the house's name if under ₹1 Cr — you save 1% stamp duty.
Leasehold vs freehold is not a dealbreaker, but price it in.
Any missing document is negotiating leverage — or an exit signal.

If you're shortlisting a flat in NCR right now and want a second set of eyes on the paperwork before you sign, send us the shortlist. We'll run this 14-point check, flag what's missing, and tell you what the seller should produce. Or browse our pre-verified inventory where this diligence is already done.