Start with the existing finish
If material history raises an asbestos concern, testing must come before disturbance.
Painted texture changes the decision
For normal ceiling work, protection and dust control are matched to removal debris and later sanding.
Read more about painted popcorn ceiling removal and why the surface should be tested before a method is promised.
Repairing the exposed ceiling
Repair or skim coating is selected after the ceiling is exposed, then followed by sanding, primer and paint as needed.
The finishing scope may include ceiling repair, skim coating, sanding, primer and paint. Not every ceiling needs every stage.
Repair through paint scope
Painted texture can change the work from removal to removal plus resurfacing. The estimate separates repair, skim coating and final paint.
What affects the estimate?
Area is one factor, but it does not describe the whole job. Height, access, number of rooms, furniture protection, coating, substrate damage and the finish required all contribute to the scope.
The popcorn ceiling pricing guide explains why two ceilings with similar dimensions can require very different preparation.