Castle Paving North East. Marshalls Accedited Landscaping Contractors & Driveway Installers. Tobermore Approved Paving Contractors , Natural Paving Approved Installers, Stonemarket Registered Installers, working to ensure you get the best possible results for your project from start to finish. It gives you the peace of mind that you can only get from a quality installation by professional, and regularly assessed specialist.