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Concrete Patio Extension

Hello I have an existing concrete patio, would like to extend it. Please check the attached image, the grass area should be replaced by plain concrete surface at the same level of existing one. The area could be around 10 m2. The work also include repair of concrete bases of brick fencing pillars. This will be discussed later. At the moment would like to know the rough cost for patio concrete extension per m2. Also if it needs to be tiled over concrete surface, how much it will cost? Thanks Ash