The best quote is the clearest same scope. A low total can become costly when primer, repairs or cleanup are missing. This matters when choosing a plasterer or hiring a professional for a large area. Give each plasterer: wall and ceiling sizes., clear photos of each surface., the age and use of the home., the current substrate and clear damage., the needed finish., access, parking and use details., the desired timing and follow-on work. State whether you need one wall, a full room or the entire home. Mention any known damp, loose plaster or old layers. Check whether each quote is wallpaper-ready, paint-ready, spray plaster or decorative plaster. Compare the planned thickness and preparation. Ask for a sample or written finish details when appearance is important. Do not rely only on local trade names.