We start the way we would in a house, with a walk-through and moisture mapping to find the source, and a free visual inspection with an estimate where visible mold is confirmed. For a building, that estimate becomes a written scope you can approve, share with owners or tenants, and file.
A typical scope names the units and rooms involved, the moisture source and the trade that should fix it, any material that has to come out, the treatment day for each unit, what occupants do on that day, and the post-treatment sampling. Boards can vote on it as written, and managers can plan unit turnovers around it.
Where a leak crosses between units, the scope can list the source unit and the damaged unit separately, which helps a board apply its own documents when it decides who pays for what.
Offices and shops follow the same planning for staff and customers. The treated space is empty on the day, so book it for a day the business is closed and tell staff when they can come back.