Key takeaways from the Green Procurement Workshop at the Sustainable Buildings and Construction Summit, Lausanne, April 2026
Buildings and construction account for more than a third of global energy-related carbon emissions. Most governments have responded with the right policy signals: net-zero commitments, embodied carbon targets, green building codes, ESG disclosure rules. Yet when public buyers go out to tender, the rules they work under still default, in almost every jurisdiction, to the cheapest upfront bid.
The result is familiar. The supplier with no Environmental Product Declaration (EPD) outbids the one that has invested in producing one. The retrofit model that pays back over a decade does not qualify. Policy ambition lives in one document; the contract is written in another; and the contract is what shapes the built environment.
Sustainable procurement is not blocked by a lack of intent. It is blocked by a structural mismatch between long-term sustainability goals and short-term, administratively rigid procurement systems.
That mismatch was the central frame of a workshop at the Sustainable Buildings and Construction Summit in Lausanne in April 2026, bringing together procurement officials, policymakers, suppliers, and finance specialists. The discussion was grouped into three thematic areas: the policy frameworks that set the rules, the procurement practices that apply them, and the supplier markets that have to respond.
The rules need to change
The clearest bottleneck raised was the gap between the time horizons that more sustainable building solutions require and public procurement permits. In most countries, traditional public procurement caps multi-year contracts at three or five years, tied to political and budget cycles rather than to the long-term economics of what is being bought. For solutions such as Energy Performance Contracts, Rooftop Solar PPAs, or Cooling-as-a-Service, that can unlock energy savings, efficiency and technology upgrades, longer tenors are needed.
Behind that sits an older problem. Most procurement systems were built for administrative simplicity and price discipline, rather than life-cycle value. Even where legal language permits “value for money” evaluation, officials and auditors often still default to the cheapest upfront bid.
Another issue is environmental thresholds. Set too low, sometimes deliberately to protect local small and medium-sized enterprises (SMEs), they make almost no contribution to decarbonisation. Set high and rigid, they can exclude credible suppliers, create political resistance, and become hard to revise. The implication is not to abandon thresholds but to design them dynamically: calibrated to market data, introduced progressively, and adjustable over time.
The reform agenda is fairly clear. Procurement rules need to permit extended contract durations for sustainable and performance-based service models. The legal evaluation objective needs to shift from “lowest cost” to “best value”, with audit logic following. And green criteria that remain voluntary will not change mainstream purchasing behaviour. They have to be mandatory, and the same standard should apply across both public and private buying so that suppliers face one signal rather than two.
Buyers need better tools and data
Even where the policy language is right, the people doing the actual buying often cannot implement it. This second layer of the discussion turned on capacity and the everyday mechanics of evaluation.
The most immediate constraint is price. Green and certified construction products often carry a cost premium, in some markets around 30 per cent, driven by certification costs, limited supplier pools, and weak competition. For a procurement officer working under audit pressure, accepting that premium without strong cover is professionally risky.
The deeper challenge is methodological. Most public buyers do not have the tools, the data, or the confidence to run a credible Total Cost of Ownership (TCO) or Life Cycle Assessment, particularly for embodied carbon in construction materials, where the underlying data is patchy. Civil and construction materials remain unevenly covered by labels and standards, in ways that vary across jurisdictions.
The workshop pointed out the importance of including life-cycle costing and the cost of carbon into tender design from the outset, not as optional add-ons. Apply Quality and Cost Based Selection (QCBS), or explicit weightings such as 80 per cent price to 20 per cent green parameters, to formalise the trade-off. And invest in practical decision-support tools that a procurement officer can use under realistic time and staffing pressure. Policy ambition without implementation capacity changes very little.
Market readiness remains key
The third area concerns the supply side. Even where the policy frame is sound, and the procurement officer is equipped to evaluate value for money alongside environmental or social impact, the bids that come in are only as good as the market that produces them, and in many sustainable construction categories that market is still thin.
The competition problem is twofold. New environmental standards risk creating de facto monopolies for the small handful of suppliers who can meet them, keeping prices high. At the same time, market scepticism toward recycled and green materials hinders scalability.
The clearest practical response is advance notice and supplier consultation. Before tightening green requirements into mandatory rules, governments should ideally signal requirements years in advance, consult suppliers during the transition window, and help the market prepare. Done this way, mandatory standards become market signals rather than market shocks.
Alongside advance notice, collaborative procurement, aggregating demand across multiple public buyers, gives suppliers the scale needed to absorb certification and innovation costs. Both moves work in the same direction: a government using its purchasing power to shape the market it needs, rather than waiting for the market to deliver what existing tenders happen to ask for.
From rules to systems thinking
Looking across the three layers, the conclusion is simple. Sustainable procurement does not scale through stricter rules alone. It scales through coherent system change: reforming the budgetary constraints that lock public procurement into short contracts, building the practical capacity that procurement officers need to evaluate beyond price, and engaging suppliers early enough that the market is ready when the rules tighten. Each of these is necessary; none is sufficient on its own.
There is one further implication. The reforms outlined here, longer contract durations, value-for-money evaluation, life-cycle costing, and advance market signalling, are exactly what service-based business models need to take hold in the public building sector. Solutions such as Energy-as-a-Service, Heating or Cooling-as-a-Service require longer contractual horizons, performance-based payment, life-cycle accounting, and a procurement counterparty equipped to evaluate against quality and outcomes rather than upfront price.
Who needs to act
Governments and policymakers
Legislate longer contract durations for sustainable public procurement and performance-based service contracts. Make the shift from “lowest cost” to “best value” explicit in procurement law. Align procurement rules with industrial, fiscal, and green building policy.
National regulators and standards bodies
Set consistent, mandatory standards that apply across public and private procurement. Broaden the coverage of labels and product declarations, particularly for construction materials and embodied carbon, to close sectoral gaps.
Procurement officers and contracting authorities
Build life-cycle costing into tender design from the planning stage. Apply Quality and Cost Based Selection or weighted criteria. Document green objectives in the Terms of Reference so that audit logic supports the decision.
Auditors and oversight bodies
Accept higher upfront costs where green objectives are clearly established in planning. Treat sustainable procurement as a recognised public-value objective.
Government contracting agencies
Use advance notice and supplier consultation. Deploy collaborative procurement mechanisms to aggregate demand.
Suppliers and manufacturers
Use transition periods to develop EPDs, ecolabels, and verification infrastructure. Engage actively in supplier consultations so that future requirements reflect what is technically and commercially feasible.
