Conditional permanent residence runs for two years from the date it is granted, and the petition to remove conditions must be filed within a defined window before that period ends. The earlier stages have their own separate timelines.
Three separate periods, each with its own dates
Hypothetical example: the family think of the case as one process with one duration. It is at least three. First, the petition is filed and adjudicated on the responsible agency's current processing timeline.
Second, depending on visa availability for the relevant category and where the family are, either consular processing or adjustment follows, and availability can add waiting that has nothing to do with processing speed. Third, conditional residence begins and runs two years, with the removal petition due in a window before it expires. Meanwhile the project has its own construction and hiring schedule, which may not align with any of these.
Record every date as it is fixed, keep the Coalhurst affairs manageable through the uncertain middle, and do not make irreversible arrangements based on an estimate no agency has given.