Offset peg
An offset peg is a survey mark placed at a known distance from a building corner so builders can re-establish the exact corner position after excavation destroys the orig
Ask Chalkline about this →An offset peg is a survey mark placed at a fixed, recorded distance from a building corner or boundary line. Offset pegs are set by the registered surveyor during the site set-out, positioned outside the zone of excavation and formwork so they survive construction activity. When the original corner marks are destroyed by excavation, the builder measures back from the offset peg to re-establish the exact corner position.
The offset distance is recorded on the surveyor’s set-out sketch. Common offsets are 1 m, 1.5 m, or 2 m from the corner, depending on site conditions. Offset pegs are not boundary pegs and do not carry the same legal weight; they are working construction marks. Do not remove or reposition them without consulting the surveyor.
Also known as: offset mark, control peg (in some surveying practices).
Category: Surveying and set-out.
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Last updated: 2026-05-10. Verified: 2026-05-10. Quarterly review for currency.