Buildings account for 90% of electricity used in Hong Kong, generating over 60% of Hong Kong’s carbon emissions. Within this figure, air conditioning is the largest culprit, taking up 24% of commercial energy use. Currently, the energy efficiency of buildings is not optimised to their full extent, and the government policy has been ineffective.



Within the building sector, commercial buildings contribute to more than 75% of emissions, with residential buildings accounting for the rest. Private residential buildings and public housing are the two major contributors in the latter category.

Energy saving and emissions reductions in buildings are crucial to achieving net zero emissions in Hong Kong. Currently, the Hong Kong government relies more on the supply side, or the fuel mix, to reduce GHG emissions from building sector, yet the demand side makes a significant contribution.

Where we need to get to

Both new and old buildings need to be optimised to create the greatest energy efficiency. A key starting point is promoting public visibility of current building energy efficiency. The government needs to tighten policies, adopt stricter standards, and promote concepts such as thermal envelopes to increase sustainability considerations during the building design process. It also needs to foster reductions in energy demand by mobilising the public to establish community initiatives for energy savings. We should perhaps think out of the box and engage in retrofitting new systems in buildings that are green and sustainable.


Installing new components in buildings that would create energy efficient systems.


Improvements to existing systems to increase energy efficiency and reduce operational energy consumption.


Changes are necessary across Government, Commercial and Individual level, please scroll down to explore how we can all contribute.


Introduce the regulations and energy efficiency standards pertaining to construction to ensure that developers and property owners prioritise energy performance. Strive to develop policies that encourage behavioural changes among the public to achieve net zero goal.

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Implement retro-commissioning or retrofit the buildings to promote energy efficiency. Seek opportunities to transition business models towards a sustainable circular economy.

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Civil Sector & Individuals

Make changes to daily habits, including opting to purchase products with a Grade 1 energy label or investing in smart, eco-friendly technologies that reduce power demand in homes.

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HK2050isNOW Climate Champions

To champion and accelerate solutions to the climate crisis, we have highlighted local organisations and showcased how their works have contributed to making Hong Kong a cleaner and greener city.

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Just as walking on sand leaves a footprint, burning fuel for human activity leaves greenhouse gases in the air, creating a carbon footprint. Everything we have, use, and consume, from food to clothes to transportation, is intimately linked to Hong Kong’s overall emissions figure.

According to WWF, if everyone on Earth led the same lifestyle as we do in Hong Kong, 4.2 Earths would be required to fulfil our resource need.

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