Here are notable luxury residential projects in Kolkata that emphasize green / sustainable features (certifications, energy & water savings, green design). I’ve listed location, main green features or certification, and short notes — sources are cited so you can check details or current availability.

1. The 42 — Chowringhee (Central Kolkata)

• Green features / cert: LEED Gold / IGBC-equivalent high-efficiency measures (energy-efficient façades, low‑E glass, water recycling, recycled materials).
• Why it’s relevant: one of Kolkata’s best-known ultra‑premium towers that has publicly documented green building measures. (Apsense.com)

2. PS Vyom / PS One10 / PS Panache (PS Group) — New Alipore, New Town, Salt Lake (multiple projects)

• Green features / cert: Several PS Group residential projects in Kolkata are IGBC‑certified or IGBC‑compliant (gold level reported for some projects); features include energy‑efficient systems, landscaped open space and water conservation.
• Why it’s relevant: PS Group markets these as luxury homes with formal IGBC recognition. (psgroup.in)

3. Trayam (Peerless / New Town Action Area I) — New Town

• Green features / cert: IGBC Gold pre‑certification reported; planned sustainable elements include solar PV, rainwater harvesting, STP / water recycling, EV charging and waste compaction. Announced as a mixed‑use project with luxury residences. (Project news / launch reported 2025). (timesofindia.indiatimes.com)

4. Sugam Habitat (Sugam Homes) — EM Bypass / East Kolkata

• Green features / cert: Developer states IGBC certification for the project, emphasizes large open green areas, rainwater harvesting and other eco‑features. Marketed as an eco‑friendly luxury residential complex. (sugamhomes.com)

5. Green Aastha — Amtala / Baruipur Road (near Wipro SEZ)

• Green features / cert: Market listings and coverage describe it as an eco‑friendly large residential township with rainwater harvesting, EV charging, natural ventilation and other sustainable amenity features; has won eco‑project recognition in press listings. (Commonfloor.com)

Context & notes

• New Town / Rajarhat and EM Bypass / Salt Lake are the Kolkata areas where most recent green‑certified luxury residential projects concentrate (planned infrastructure and incentives helped this trend). (timesofindia.indiatimes.com)
• The Indian Green Building Council (IGBC) and LEED remain common benchmarks; developers often publicize IGBC pre‑certifications or gold/silver ratings for large luxury towers. (timesofindia.indiatimes.com)

If you want next steps, I can:

• Search for currently available/resale units and price ranges for any of the projects above (will check listings and RERA records).
• Pull developer contact info, model‑flat photos, or IGBC/LEED certificate pages for a specific project.

Which project or neighbourhood would you like me to look up availability or current prices for?