How to Check Kolkata Municipal Corporation Holding Number — Complete Guide 2026 | Advocate Panchanand Shaw

What is a KMC Holding Number?

A KMC Holding Number is a unique 7-digit (or longer) identification number assigned by the Kolkata Municipal Corporation to every assessable property within its jurisdiction. The format is typically [Ward No.]-[Street No.]-[Block No.]-[Holding No.], such as '66-1-1-001'. It is the primary identifier for all KMC services related to that property — property tax, mutation, building plan approval, trade license, and water supply connection.

The holding number system dates back to the colonial era and was formalized under the Kolkata Municipal Corporation Act, 1980. Every property — residential, commercial, institutional, industrial, and even vacant land — within KMC limits must have a holding number. It is separate from the municipal ward number and the postal address, though it often (but not always) correlates with the location.

How to Find Your KMC Holding Number Online

If you don't know your property's holding number, here are the online methods to find it:

1. KMC Property Tax Portal: Visit kmcgov.in → Online Services → Property Tax → 'Search Property'. Select 'Don't know holding number?' and search by owner name, address, or assessee name. The search returns matching properties with their holding numbers.
2. KMC GIS Map: The KMC has a GIS-based property mapping system accessible from their website. You can zoom into your property location on the map and click to view the holding number and assessment details.
3. Ward Office: Each KMC ward has a Borough Office that maintains physical records of all holdings. You can visit the Borough Office for your ward with your address and identity proof to obtain your holding number.
4. Old Tax Receipts: If the property has been paying tax, previous property tax receipts always display the holding number prominently.
5. Registered Sale Deed: The sale deed of the property usually mentions the KMC holding number in the property schedule.

How to Apply for a New Holding Number

Newly constructed buildings or properties that have been subdivided/demolished need a fresh holding number assessment. The process:

1. Submit an application for assessment of a new holding to the KMC Assessment Department at your Borough Office.
2. Attach the required documents: (1) Copy of registered sale deed/lease deed, (2) Sanctioned building plan, (3) Completion Certificate from KMC, (4) Mutation certificate (if the land was already assessed under a different holding), (5) Identity proof of the owner, (6) Site plan of the building.
3. The KMC Assessment Inspector visits the property for physical inspection — measuring the covered area, verifying usage, and documenting construction details.
4. Based on the inspection report, the Assessor-Collector determines the Annual Valuation and issues a new holding number.
5. The new holding number and tax demand are communicated to the owner via a notice and updated on the KMC portal.
6. The entire process typically takes 1-3 months.

Importance of Holding Number in Property Transactions

The holding number is critical for:

• Property Sale/Purchase: Buyers must verify that the holding number on the sale deed matches KMC records and that all property tax dues are cleared before registration.
• Mutation: After property purchase, the buyer must apply for mutation with KMC to update the holding records with the new owner's name. Without mutation, the previous owner's name continues in KMC records.
• Property Tax Clearance Certificate: Issued by KMC upon full payment of property tax. Required for sale deed registration, mortgage creation, and building plan approval.
• Building Plan Approval: Any construction, renovation, or addition to a building requires KMC sanction, which references the holding number.
• Trade License: For commercial properties, the trade license application requires the holding number of the premises.
• Water and Drainage Connection: KMC water supply and sewerage connections are linked to the holding number.

Multiple Holdings and Sub-division

A single building with multiple flats or units sharing a common holding number may need to be sub-divided into separate holdings. This is common when flats are sold to different buyers. The sub-division application requires: the original building plan, individual flat sale deeds, NOC from all flat owners, and a physical verification by KMC. Each subdivided unit receives a suffix to the original holding number (e.g., 66-1-1-001/1, 66-1-1-001/2).