Start with what happened during the work
Drywall sanding, flooring work, and demolition can create different kinds of debris. Whether material entered the air system depends on containment and system use. Describe the work, the rooms involved, and whether returns or registers were uncovered. This is more useful than assuming every renovation requires the same cleaning package.
Time the assessment sensibly
Ongoing construction may continue to release dust after an early clean. Coordinate with the contractor so the main dust-producing work and general cleanup are complete. Access to finished rooms, equipment locations, and previously covered openings should be available for the agreed visit.
Do not treat unknown material as ordinary dust
Known or suspected hazardous materials need appropriate specialist assessment. Do not disturb deposits from an uncertain demolition project simply to create a before photo. Share the building and material information available to you so the service provider can decide whether ordinary cleaning is suitable.
Define the boundary between tasks
Room cleaning, debris hauling, filter replacement, duct cleaning, and mechanical repair are separate work items. Confirm who is responsible for each one. A clean room does not describe the hidden duct condition, and a duct clean does not remove all dust from the building.
Keep a useful record
Note affected areas and any access restrictions at handover. For future projects, discuss protecting openings with the relevant contractor before work begins. See construction dust removal for the information to include with an estimate request.