World's largest office building cost £302m and has 4,000 CCTV cameras due to what’s inside
- Posted on October 10, 2026
- By Express
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- 1 min read
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World's largest office building cost £302m and has 4,000 CCTV cameras due to what’s inside
India's Surat Diamond Bourse (SBD) is the world's largest office building, overtaking the Pentagon after opening in December 2023