A unique numeric identifier assigned to each land parcel by the Revenue Department during the original land survey.
A survey number is the unique identifier assigned to every land parcel in revenue records during the original land survey conducted by the government. It remains constant unless the land is formally subdivided. The format varies by state — in Tamil Nadu, survey numbers are typically numeric with optional subdivision indicators like 123/2A, where 123 is the parent survey number and 2A is a subdivision. Every revenue document — Patta, Chitta, EC, FMB — references this survey number.
The survey number is the primary key for all land records. During due diligence, every document must be cross-referenced using the survey number to confirm consistency — the Patta, Chitta, EC, and FMB should all reference the same survey number with the same extent. GPS coordinates from a site visit should map to the correct survey number boundaries. Any inconsistency in survey numbers across documents is a serious red flag that requires immediate investigation.
When land is subdivided — through sale of a portion, family partition, or development — new sub-survey numbers are created under the parent survey number. The Revenue Department records this subdivision in the A-Register and issues new Pattas for each sub-divided parcel. Periodic re-surveys by the government may reassign survey numbers entirely. Always verify the latest survey number with the Taluk office, especially for properties that have been subdivided multiple times.
A revenue document issued by the Tamil Nadu government that records the current owner of a land parcel.
A revenue extract maintained by the Tamil Nadu government showing land classification, extent, and tax details for a survey number.
A survey record maintained by the Revenue Department that shows the boundaries, dimensions, and adjacent survey numbers of a land parcel.
The primary land register maintained at the village level by the Revenue Department, recording ownership, classification, and extent of every survey number.
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