I just noticed a survey crew digging a hole in my front lawn but I have not ordered a survey. Are they allowed to do this?

The short answer is “yes.”  Since our work involves a legal survey which retraces the boundaries and boundary markers, we have statutory protection from prosecution for trespassing under the Surveys Act of Ontario.  Having unfettered access to adjoining properties — and often parcels distant — from the lands under survey, it is critical for us to be able to perform our legal duties (see FAQ #1 above).  We do make every effort, especially in urban areas, to advise property owners of our presence as a courtesy.