URBP7005 Chap.12 Green Building and Urban Renewal in Hong Kong
Green Building and Urban Renewal in Hong Kong
Codes and ratings do different jobs
An energy code produces a binary outcome: the building complies or it does not. A green building rating produces a graded outcome across bands.
Green building itself is defined across three levels at once: globally, reducing environmental loadings, resource use and carbon emissions; locally, harmony with the surrounding environment, minimising negative impact and giving positive impact; and for occupants, health, comfort and wellbeing.
Three things are mandatory in selected aspects, covering thermal transfer through the envelope, building services energy, and the size of refuse rooms. The rating is not compulsory by law.
How a voluntary standard becomes expected
From 2001 to 2010 concessions for green and innovative features had no overall cap and no requirement to prove that a building was really green.
From April 2011 a practice note required compliance with sustainable building design guidelines, submission of a rating assessment together with energy efficiency data, and a ten per cent cap on certain concessions. Participation ran at roughly forty three to fifty seven per cent of private development projects.
After a review between 2019 and 2023, a version effective from 30 June 2024 offers three paths to the same maximum concession: gold or above, silver plus one specific standard, or bronze plus two.
Why renewal stalls
The problem is stated as financial rather than design.
Sites have multiple owners, acquiring their interests is expensive, property prices have fallen, and old districts are often unsuitable for an increase in density, so redevelopment is not profitable and projects do not start.
A planning board spokesman is quoted making the point directly: buildings are ageing far faster than they are being replaced, few schemes now stack up financially, and the answer has to be bolder and more inventive policy, including putting new land in a major development area to work in support of renewal in the old districts.
The instrument in response
Two live routes exist: transfer of plot ratio, within the same statutory plan or across districts, and a bonus plot ratio pilot for seven designated old districts.
The larger ambition is an exchange of development rights that ties renewal in the old districts to building in the new ones. Redevelopment would stop being priced lot by lot and become a citywide allocation of rights, so that granting one in a new area sets renewal going in an old one.
What this chapter covers
- 01
Compliance against grading, and the three levels of scope
- 02
What is mandatory and what is voluntary
- 03
Registration counts and what they measure
- 04
The floor area concession before and after 2011
- 05
Rating bands, thresholds and the eligibility line
- 06
The 2024 version and its three paths
- 07
Land sale conditions as an administrative route
- 08
The chain of constraints that stops redevelopment
- 09
Transfer of plot ratio and the bonus ratio pilot
- 10
A development right exchange as a citywide system
Assess a claim built on a registration count
- 3Concede the premise and locate the error.
- 3Name the two administrative routes that price participation.
- 3Give the sharpest evidence against the inference.
Key terms
- Energy Code
- A mandatory instrument producing a binary outcome, under which a building either complies with the stated requirements or does not.
- Green Building Rating
- A voluntary instrument producing a graded outcome across bands, scoring a project on environmental loadings, local impact and occupant wellbeing.
- Floor Area Concession
- An administrative incentive granting additional permitted floor area for green and amenity features, capped at ten per cent and conditional on a rating submission since 2011.
- Land Sale Condition
- A term attached to the disposal of a specific lot, which binds only the buyer of that lot and is used where a general rule would be contested.
- Bonus Plot Ratio
- Additional development capacity granted to make an otherwise unviable redevelopment possible, piloted for seven designated old districts.
- Development Right Exchange
- A proposed device under which the owner of a run down property in an old district may swap the right attached to it for building capacity in one of the new development areas.
Green Building and Urban Renewal in Hong Kong FAQ
Is the green building rating compulsory?
Not by law. Mandatory requirements in selected aspects cover thermal transfer through the building envelope, building services installations under the energy code, and the size of refuse rooms.
The rating itself is voluntary, but two administrative routes make it effectively expected: the floor area concession has required a rating submission since 2011, and land sale conditions in one district require a design stage gold rating. That combination is the transferable mechanism for any city that cannot legislate.
What does a registration count actually tell you?
How many projects joined a scheme, which is participation rather than performance. Under the first version of the concession the benefit could be obtained irrespective of the rating achieved, so an unclassified project still counted. To make a performance claim you would need the distribution of ratings actually achieved and, better still, measured energy use after occupation rather than a design stage assessment.
Saying which series is missing is a stronger methods paragraph than any inference from the series you have.
Why is urban redevelopment described as a financial problem rather than a design problem?
Because the chain of constraints is financial at every link: sites have multiple owners, acquiring their interests requires high compensation, the finished value that has to cover the cost has been falling, and old districts are often unsuitable for the density increase that would raise it.
The result is that redevelopment is not profitable and projects do not start, which is why the instruments in response work on capacity and value rather than on design quality.
Is a plot ratio transfer costless?
No. The cost lands on the receiving district, which absorbs development its infrastructure, open space and services were not sized for, and on the general revenue that would otherwise have received the premium for that capacity.
Whether the trade is worth making depends on whether the receiving area has genuine capacity and on whether the renewal being financed would otherwise not happen, and both have to be argued rather than assumed.
Assessment move
Find out whether your case city attaches any benefit to a voluntary environmental standard, and if so what the benefit is worth. That single fact usually explains the adoption rate better than any account of developer attitudes, and it gives a group project on environmental policy a concrete instrument to recommend changing rather than an exhortation.
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