London polished plastering prices vary from company to company, but typically Venetian plaster contractors charge per square metre. The cost per m2 for marble plastering depends on the commercial model of the company itself, as well as the type of product used. Marmorino, grassello, travertino plaster, lime concrete, microcement etc. all have different properties and different base costs to the plastering company, which is reflected in the end cost to customers. Generally though, polished plasterers in the London area charge anywhere from around £50 to £80 per square metre.