The construction industry cannot become sustainable through a single material, technology or design decision. Sustainability has to be considered throughout a project’s lifecycle – from early planning and material selection to construction, operation, renovation, and eventual reuse or demolition.
While Part 1 discussed why sustainability has become important for the construction industry and the challenges slowing its adoption, this part focuses on the practical ways project teams can move towards more sustainable construction.
Means to Achieve Sustainable Development
1. Design for Lower Energy and Carbon
Sustainability should begin before construction starts. Decisions about building orientation, façade design, insulation, glazing, shading and mechanical systems can significantly influence energy demand during operation.
Energy modeling helps design teams compare options early, rather than waiting until construction is underway. This allows teams to assess heating and cooling loads, daylight, energy consumption and the potential contribution of renewable energy.
The focus is also moving beyond operational energy. Embodied carbon from materials, manufacturing, transportation, construction, maintenance, and end-of-life processes must be considered alongside operational emissions. UNEP identifies materials such as cement and steel as important sources of emissions within the built environment.
2. Choose Materials More Carefully
Sustainable construction does not mean simply replacing conventional materials with products labelled “green.” The environmental impact, durability, availability, maintenance requirements and intended use of a material all need to be considered.
Design teams can reduce material impacts by optimizing quantities, specifying products with verified environmental information, using recycled or reused materials where appropriate and considering lower-carbon alternatives.
For example, the cement industry is exploring clinker substitution, alternative fuels, improved production efficiency and carbon capture as part of its transition towards lower emissions. The suitability of any alternative still depends on structural requirements, local standards and project conditions.
A life-cycle assessment (LCA) provides a more systematic way to evaluate environmental impacts across a product or building’s life cycle. ISO 14040 establishes the principles and framework for conducting LCA.
3. Reduce Waste Through Better Planning
A large amount of construction waste can be linked to inaccurate quantities, design changes, damaged materials, and inefficient site practices.
Better planning can reduce these losses. Prefabrication and off-site manufacturing can improve material control and reduce certain types of site waste, particularly when components are manufactured from coordinated information.
Designing for disassembly can take this approach further. Instead of treating a building as a structure that will eventually become waste, designers can plan components for repair, replacement, reuse, or recycling at the end of their service life.
This supports a circular construction approach, where materials remain useful for as long as possible rather than moving directly from construction to disposal.
4. Use BIM to Make Better Decisions
BIM can support sustainability when model information is connected to actual project decisions.
A coordinated BIM services workflow can provide information about quantities, materials, building elements and systems. This information can support quantity take-offs, design coordination, energy analysis, and material comparisons.
For example, identifying a design change early can prevent unnecessary rework and material consumption later. BIM can also help coordinate prefabricated components before they reach the site, reducing the risk of installation errors.
The important point is that BIM itself does not make a building sustainable. Its value comes from how accurate project information is used to make better decisions.
5. Improve Construction Practices
Sustainable construction also depends on what happens on the job site.
Contractors can reduce environmental impact through better logistics planning, efficient equipment use, responsible material storage, waste segregation and careful management of water and energy consumption.
Electrification is another area of change. Electric construction equipment is increasingly being adopted for suitable applications, although its environmental benefit depends partly on electricity sources, equipment requirements and site conditions.
The goal should not be to adopt technology simply because it is new. The technology needs to solve a specific project problem while improving efficiency, safety or resource use.
6. Plan for the Building’s Entire Life
A sustainable building should not be assessed only on the day it receives a completion certificate.
Operational performance, adaptability and eventual refurbishment can have a major influence on its long-term environmental impact.
This is where life-cycle thinking becomes important. A building designed for easy maintenance and future adaptation can avoid unnecessary demolition and reconstruction when its requirements change.
Digital building information can also support facility teams after handover by providing useful information about assets, systems, and maintenance requirements.
The Role of Construction Companies and Governments
Sustainable construction cannot be achieved by designers alone. Owners, architects, engineers, contractors, manufacturers and facility managers all influence project outcomes.
Construction companies can help clients evaluate sustainable alternatives, improve coordination and plan efficient construction processes. They can also work with suppliers to understand the environmental information associated with products and materials.
Governments and regulatory bodies also play an important role through building codes, energy-performance requirements, incentives, and public procurement policies. Regulations are already becoming more demanding in several markets.
For example, under the EU’s revised Energy Performance of Buildings Directive, zero-emission buildings become the standard for new public buildings from 2028 and for all new buildings from 2030, subject to the directive’s provisions and exemptions.
Building a More Sustainable Future
Sustainable construction is moving beyond individual green products and isolated initiatives. It is becoming a way of planning, designing, constructing and managing buildings.
The next step, then, is not about finding one technology that solves sustainability. It is about making better decisions at every stage of a building’s life.
From low-carbon materials and efficient systems to BIM-enabled coordination, circular design and smarter construction practices, the industry has the tools to move forward. The real challenge is putting them together early enough to make a measurable difference.
