The short answer
Local ratings such as IGBC or GRIHA in India, and international systems such as LEED or BREEAM, chosen by market expectation and cost.
Choose the system your client, lender or tenant recognises. In India, IGBC and GRIHA are widely used; LEED carries international recognition; BREEAM is common in the UK and Europe.
Certification adds documentation effort and consultant cost. Decide at concept stage — many credits depend on decisions that cannot be added later.
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