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Evaluation is necessary to ascertain how green a building is. Apart from verifying claims, such systems ensure that best practices are followed and the gains made are quantified. GRIHA (Green Rating for Integrated Habitat Assessment), the green rating system developed by The Energy Resources Institute (TERI), is promoted by the Ministry of New and Renewable Energy (MNRE) as the National rating system.

Not only has GRIHA evaluated and incorporated most of the green building criteria originally developed by LEED, a green building rating system that was developed in the US and adopted by the Indian Green Building Council in 2001, it has also added further requirements to make the system more suitable to the Indian building context. In addition, MNRE has made it mandatory for buildings to obtain a GRIHA rating to avail subsidies and other financial assistance allocated for green development. The Ministry also provides incentives to local bodies that offer rebate in property tax for GRIHA rated buildings.

A few of these basic standards in GRIHA include:

– Minimum level of sanitation/safety facilities for construction workers.
– Minimum natural day lighting requirements as per the NBC
– Minimum artificial lighting requirements as per the ECBC
– Urban context consideration