I’m looking for a flat in DSR Eden Greens, can someone tell me what is the on going sqft rate for flats at this place (carmelaram)?

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There is a railway station right opposite to this property, But, this preoperty very closer to my kids school.

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Builder is promising OC.

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Builder quoting 5200/- sqft including all & Tax, But excluding registration & stamp duty. I feel this higher. What is the on going rate?