Mutation and title: what each record can show

Quick answer

The difference between mutation and title in West Bengal is the difference between a record and a right. Title is the legal right to the property, which for a flat normally comes from a registered deed. Mutation is a municipal or development-authority entry recording whose name the property stands in, mainly for tax. A mutation entry helps show who the authority deals with, but it does not create or prove ownership on its own.

What this guide covers, in reading order. Original illustration.

Buyers are often shown a property tax receipt or mutation certificate as if it settled who owns a flat. It does not. Equally, an owner with a perfect deed can run into trouble if the mutation was never updated. You need both, and you need to know what each can and cannot show.

What title rests on

For a flat, title usually rests on the registered instrument by which it was transferred: a conveyance, sale deed, gift deed, or in some cases a lease or assignment. In a West Bengal housing co-operative, s.92(1) of the Co-operative Societies Act, 2006 says that on allotment an instrument of transfer under the Transfer of Property Act, 1882 is conclusive evidence of the member's title. For flats submitted to the West Bengal Apartment Ownership Act, 1972, that Act makes each apartment, with its undivided interest in common areas, heritable and transferable immovable property (s.4).

Title also depends on what came before: each earlier owner must have had the right to pass the property on. That is why lawyers trace the chain of deeds, not just the latest one. For co-operative flats, the society's membership record is a further layer; see title deed and society membership.

Mutation and title – illustration for the article “Mutation and title: what each record can show” — Mutation and title: original Coopman illustration.

What mutation records

Mutation is the updating of an authority's register so that the property stands in the new holder's name. Which authority depends on where the flat is:

Area	Authority keeping the record	What we verified
New Town (Rajarhat)	NKDA	NKDA's "Record of Title (Mutation)" service is open to an owner, or a lessee on permission from HIDCO. It lists fees of 0.5% of deed or market value for transfers and 0.25% for inheritance. See NKDA records and society records.
Salt Lake and Rajarhat-Gopalpur	Bidhannagar Municipal Corporation (BMC)	BMC's site links e-mutation through wburbanservices.org, which it says started on 29.07.2022 for wards 1–28. BMC's Assessment Charter asks, for co-operative flats, for "membership approval from co-operative society with resolution", and lists leasehold-land documents.
Kolkata Municipal Corporation area	Kolkata Municipal Corporation	We did not verify KMC's current procedure or fees. Check with KMC.

Notice the direction of the paperwork: the authority asks for the deed and, for co-operative flats, the society's approval. Mutation follows title and membership; it does not replace them.

Mutation is not title: what courts have said

The Supreme Court has said in plain terms that revenue-record entries do not confer ownership. In Suraj Bhan v. Financial Commissioner (Civil Appeal No. 1971 of 2007, decided 16 April 2007), it held that "entries in the Revenue Records or Jamabandi have only 'fiscal purpose' i.e. payment of land-revenue, and no ownership is conferred on the basis of such entries". That case concerned agricultural revenue records, not a municipal flat record, but the principle is regularly applied to mutation generally: the entry tells the authority whom to bill, not who owns.

What each record can show

Question	Registered deed (title)	Mutation entry	Society register (co-operatives)
Who has the legal right to the flat?	Yes, read with the chain of earlier deeds	No, only who the authority records	No, only who is a member
Who pays property tax?	No	Yes	No
Who may vote and receive society notices?	No	No	Yes
Was the transfer permitted by HIDCO or the Land Manager?	Only if the deed recites it	Indirectly, if the authority required it before mutation	Only if the society's file records it
Are taxes up to date?	No	Yes, via tax receipts	No

Checklist for buyers and owners

Trace title through registered deeds to the first allotment or first owner.
Check the current mutation is in the seller's name; if not, find out why before paying.
Check property tax receipts are up to date and in the same name.
For co-operative flats, check the society's register shows the seller as member.
For leasehold land in Salt Lake or New Town, check the required government permission for earlier transfers; see New Town leasehold questions.
After you buy, apply for mutation promptly and keep the acknowledgement and the order.

Doing this on COOPMAN

COOPMAN keeps the society's side of the record: owner members, units, share certificates and nominations with history, and membership transfers that pass through surrender, society approval and final platform approval. It does not record title or file mutation applications. Use the buy or rent guide to plan which record you need from whom.

This is general information, not legal advice on a particular property.

Mutation and title: frequently asked questions

If the mutation is in my name, do I own the flat?

Not on that basis alone. Courts treat revenue and mutation entries as records for fiscal purposes. Ownership depends on your registered deed and the chain behind it.

If I own the flat, do I need mutation?

Yes, practically. The authority will keep billing and dealing with the previous holder until its record is updated, and buyers and banks will ask for it.

Which comes first, mutation or society membership?

For co-operative flats, both BMC and NKDA ask for society papers showing membership approval, so membership usually comes first.

Can mutation be refused?

Yes. NKDA's 2025 order, for example, provides for a hearing before refusal. Ask for reasons in writing.

Sources and review

Section 92, WB Co-operative Societies Act, 2006 (Indian Kanoon) indiankanoon.org
West Bengal Apartment Ownership Act, 1972 (PRS copy) prsindia.org
NKDA – Record of Title (Mutation) nkdamar.org
NKDA order on mutation procedure and delegation, 27.05.2025 nkdamar.org
Bidhannagar Municipal Corporation – About BMC bmcwbgov.in
Bidhannagar Municipal Corporation – Assessment Charter bmcwbgov.in
Supreme Court, Suraj Bhan v. Financial Commissioner, Civil Appeal No. 1971 of 2007, 16.04.2007 (Rajasthan High Court judgment library) hcraj.nic.in

Facts checked against the sources listed on 3 October 2026.

Next step: read the COOPMAN buy or rent guide, then apply for mutation with the relevant authority.