How to read an Ontario lot-and-concession description
Ontario describes land by lot and concession within a named township. Here's how to read 'Lot 12, Concession 4, Mono Township'.
Step by step
1. Lot (12): the lot number within the concession. 2. Concession (4): the concession strip running across the township. 3. Township (Mono): the named geographic township. 4. County (Dufferin): the larger administrative area. There is no meridian or range.
Last reviewed June 2026. General information about survey systems — not legal, title, or survey advice.
Sources: Ontario — Office of the Surveyor General, Ontario — Surveyor General glossary.