What does sustainable construction mean, and how does it balance the needs of people, the planet and the economy?
Sustainability and sustainable development in construction: meeting present needs without harming the future, and the social, economic and environmental pillars.
A CCEA GCSE Construction answer on what sustainability and sustainable development mean in construction, the three pillars (social, economic and environmental), and how building sustainably balances the needs of people, the planet and cost.
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What this dot point is asking
CCEA wants you to explain what sustainability and sustainable development mean, and to apply this to construction. You should know the three pillars (social, economic and environmental) and understand that building sustainably means balancing the needs of people, the planet and cost, both now and for the future.
The answer
What sustainability means
The idea recognises that the Earth has limited resources and that what we build today affects the world that people will inherit. A building can last 60 years or more, so the decisions made when it is constructed have long-lasting effects on energy use, waste and the wider environment.
The three pillars
Sustainability is usually described as a balance of three parts, often called the three pillars or the three Ps (people, planet, profit).
True sustainability means balancing all three at once. A building that is cheap to build (economic) but wastes energy and harms the environment is not sustainable; nor is one that is very green but so expensive that no one can afford it. The aim is a solution that works for people, the planet and cost together.
Why it matters in construction
Construction uses huge quantities of materials, energy and water, produces a large share of waste, and is responsible for a large part of carbon emissions, both in building and in running buildings afterwards. Because the industry has such a big footprint, even small improvements across many projects make a large difference. This is why later dot points look at reducing environmental impact, improving energy efficiency, using renewable energy, and conserving water.
Worked example: judging whether a choice is sustainable
Examples in context
- Example 1. A new housing development
- A sustainable scheme provides good-quality, healthy homes (social), is affordable to buy and cheap to run because it is energy efficient (economic), and is built with low-impact materials and renewable energy (environmental). All three pillars are addressed together.
- Example 2. Reusing a building
- Refurbishing an old building instead of demolishing and rebuilding saves materials and energy (environmental), is often cheaper (economic), and keeps a familiar local landmark in use (social). Reuse is frequently the most sustainable option.
- Example 3. Whole-life thinking
- A heat pump costs more than a gas boiler to install (economic cost now) but uses less energy and produces less carbon for decades (environmental benefit) and lower running bills (economic benefit over time). Sustainability looks at the whole life, not just the day it is built.
Sustainability is the theme running through the whole of Unit 2. Every later topic, from cutting waste and carbon to insulating buildings, generating renewable energy and saving water, is a way of putting these three pillars into practice on a real construction project.
Try this
Q1. Define sustainable development. [2 marks]
- Cue. Meeting present needs without reducing the ability of future generations to meet their own needs.
Q2. Name the three pillars of sustainability. [3 marks]
- Cue. Social, economic and environmental.
Q3. Give one environmental benefit of using locally made materials. [1 mark]
- Cue. Less transport, so less fuel use and lower carbon emissions and pollution.
Exam-style practice questions
Practice questions written in the style of CCEA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
CCEA style3 marksExplain what is meant by sustainable development.Show worked answer →
Sustainable development means meeting the needs of people today without reducing the ability of future generations to meet their own needs. In construction it means building in a way that uses resources carefully, limits harm to the environment, and still provides the buildings and jobs people need now.
Markers reward the idea of meeting present needs (one mark), without harming or compromising the needs of the future or future generations (one mark), and a link to using resources carefully or limiting environmental harm (one mark).
CCEA style6 marksSustainable construction is often described as balancing three pillars. Name the three pillars and give one example of each in a construction project.Show worked answer →
The three pillars are social, economic and environmental:
- Social: creating buildings and communities that are healthy, safe and a good place to live, and providing local jobs and skills.
- Economic: making sure the project is affordable to build and run, and gives value over its lifetime, supporting the local economy.
- Environmental: protecting the environment by using fewer resources, cutting waste and pollution, and reducing energy use and carbon.
Markers reward one mark for naming each pillar and one mark for a relevant example of each, up to six marks.
Related dot points
- The environmental impact of construction (resource use, waste, pollution and carbon over the building life cycle) and ways to reduce it.
A CCEA GCSE Construction answer on the environmental impact of construction: the use of resources, waste, pollution and carbon emissions across the life cycle of a building, and the methods used to reduce that impact.
- Energy efficiency in buildings: how heat is lost, the use of insulation and U-values to reduce heat loss, and energy ratings.
A CCEA GCSE Construction answer on energy efficiency in buildings: how heat is lost through the fabric, how insulation and low U-values reduce heat loss, and how energy ratings measure a building's efficiency.
- Renewable energy technologies for buildings: solar photovoltaic and solar thermal, wind, heat pumps and biomass, and their advantages and limitations.
A CCEA GCSE Construction answer on the renewable energy technologies used in buildings: solar photovoltaic and solar thermal panels, wind turbines, heat pumps and biomass, with the advantages and limitations of each.
- Water conservation and management in buildings: saving water, rainwater harvesting and greywater reuse, and managing surface water with SUDS.
A CCEA GCSE Construction answer on water conservation and management in sustainable buildings: ways to save water, rainwater harvesting and greywater reuse, and managing surface water with sustainable drainage systems (SUDS).