The condition of a property can make a major difference to plastering costs. Modern walls in good condition may need only limited preparation, while older properties can have uneven backgrounds, previous repairs and layers of old finishes. wall plastering cost london and Edwardian homes in London often contain surfaces that have been altered several times over the years. A wall may have been repaired, painted, papered and replastered more than once.Before work starts, the plasterer needs to establish whether the existing surface is suitable for a new finish. Loose material should be removed and damaged areas repaired.Moisture can also affect plastering. Signs of damp, staining or previous leaks should be investigated before applying a new finish. Plastering over an unresolved problem may only conceal it temporarily.The amount of furniture and access available can also affect preparation time. Protecting an occupied property requires care and can take longer than working in an empty room.This is why a site inspection can be valuable when the property condition is uncertain. It allows the plasterer to assess the surfaces and provide a quotation based on the actual work required.A realistic budget should allow for the condition of the building rather than assuming every room will require the same treatment.