Green Mark Award 2019 – Platinum (Recertified)
- Building and Construction Authority (BCA)

Singapore Health Award 2017
- Special Award: Healthy Workplace Ecosystem

City House Levels 2 & 5 (Recertified)
Green Mark Award for Office Interiors 2017 – Gold^PLUS
- Building and Construction Authority (BCA)

City House Levels 3, 4 & 22 (Recertified)
Green Mark Award for Office Interiors 2017 – Gold
- Building and Construction Authority (BCA)

Green Mark Pearl Award 2015 – Pearl Prestige
- Building and Construction Authority (BCA)

City House Levels B1 & L21, L19, L20 & L23, L2 & L5 (Recertified)
Green Mark GoldPlus for Office Interior 2015
- Building and Construction Authority (BCA)

City House Levels L3, L4 & L22* (Recertified)
Green Mark Gold for Office Interior 2015
- Building and Construction Authority (BCA)

City Serviced Offices – City House
Green Mark Award for Office Interior 2015 (Certified)
- Building and Construction Authority (BCA)

ISO 50001 Energy Management System (EnMS) certification

Green Mark Platinum Award 2014 (Recertified)
- Building and Construction Authority (BCA)

City House Levels 3,4 & 22
Green Mark Gold for Office Interior 2011
- Building and Construction Authority (BCA)

Green Mark Gold 2011
- Building and Construction Authority (BCA)

Flu Pandemic Business Continuity Programme Certification 2010
- Singapore Business Federation and SPRING Singapore

Green Mark Gold 2008
- Building and Construction Authority (BCA)

Fire Safety Award 2007

Fire Safety Excellence Award 1999-2003

Energy Smart Label Award
- Energy Sustainability Unit (ESU) of the National University of Singapore & the National Environment Agency