Mutation of Property in Kolkata Municipal Corporation — Complete Guide

What is Property Mutation and Why Does It Matter?

Mutation is NOT the same as registration. Registration of a sale deed at the Sub-Registrar's office is what transfers legal title (ownership) from the seller to the buyer. Mutation is the subsequent step of updating the KMC's property tax records to reflect the new owner. While registration confers ownership, mutation ensures that the municipal authority recognizes you as the owner for property tax, building plan, and utility purposes. Think of it this way: registration is about your legal right to the property; mutation is about the government's record of who is responsible for the property.

Mutation is required in three main situations: (1) Sale/purchase — when you buy property, you must mutate it in your name after registration. (2) Inheritance/succession — when you inherit property after the owner's death, mutation transfers the municipal record to your name. (3) Gift/settlement — when you receive property as a gift or through a family settlement. In each case, the basic procedure is similar but the documentary requirements differ. For inheritance cases, additional documents like the death certificate, legal heir certificate, and family tree are required.

In Kolkata, the KMC is divided into 16 boroughs, each handling mutation for properties within its jurisdiction. The Assessment Department of each borough is responsible for processing mutation applications. The KMC headquarters at 5 S.N. Banerjee Road oversees the overall system. Properties in areas not covered by KMC — such as Salt Lake (Bidhannagar), Rajarhat, or New Town — fall under different municipal bodies with their own mutation procedures.

Step-by-Step Mutation Procedure and Documents

The mutation procedure at KMC: (1) Obtain the prescribed mutation application form from the borough office or download from the KMC website. (2) Fill out the form with details of the property (address, ward number, municipal holding number), the previous owner, and the new owner. (3) Attach all required documents — for sale cases: registered sale deed, previous tax receipts, encumbrance certificate, ID proofs; for inheritance: death certificate, succession certificate, family tree, affidavit. (4) Submit the application at the Assessment Department of the relevant KMC borough and pay the mutation fee.

(5) KMC issues a public notice inviting objections — usually displayed at the borough office and the property itself. Anyone with a claim against the mutation has 30 days to object. (6) If no valid objections are received, a KMC inspector visits the property to verify its physical condition, measurements, and usage. (7) After the inspection report is submitted, the Assessment Department processes the mutation — updating the name in the property tax record and issuing a mutated tax bill in the new owner's name. (8) Collect the mutation certificate/order from the borough office.

Common reasons for mutation rejection: incomplete documentation, mismatch between the name in the sale deed and the application, pending property tax arrears (all dues must be cleared before mutation), unauthorized construction (which may require regularization first), or objections from co-heirs (in inheritance cases). A property lawyer can identify and resolve these issues before filing, avoiding rejection and saving months of delay.