A new block is being added to an existing project. There is an existing lawn and a road adjacent to the proposed block. The road will also be serving as access road for the proposed block. The virtual site boundary is marked excluding the road. Is this the right approach to calculate the net paved area for criterion 05 (GRIHA Version 3)?
No, this is not the right approach. The virtual site boundary should include all the existing supporting services which will serve the proposed project. So, since the existing road will also be serving as access road for the proposed block, part of it needs to be considered for calculations. A project specific discussion with GRIHA Council is usually done in unique cases to ensure proper course of action.