Civil engineering falls to six-year low

S&P Global has reported another month of contraction across UK construction, with civil engineering activity falling at its sharpest rate for more than six years.

The headline UK Construction PMI reached 38.4 in June, up only slightly from 38.2 in May and still far below the 50.0 mark separating growth from contraction. Output has now declined every month since January 2025, with June producing the second-fastest overall fall since the pandemic period.

Civil engineering was the weakest-performing segment, dropping to 22.1 in June. That was the lowest reading since April 2020 and points to a severe loss of momentum across infrastructure-related work. Housebuilding also remained under heavy pressure, while commercial construction was the least weak of the three monitored categories.

The figures show a sector still waiting for policy commitments, infrastructure need, and planning reform to turn into site activity. Contractors continue to report delays to infrastructure work and fewer public-sector tender opportunities, even as long-term demand remains clear across transport, energy, water, housing, schools, healthcare, and local infrastructure.

Public infrastructure uncertainty has been reinforced by recent decisions and delays affecting road and rail projects, including pressure around schemes such as the A38 and A46. The UK has an extensive backlog of infrastructure requirements, but that demand does not support employment, plant utilisation, or specialist investment until it becomes funded, procured, and buildable work.

Civil engineering businesses depend heavily on programme visibility. Plant, labour, temporary works, specialist subcontractors, materials procurement, and supervision all require confidence that projects will move through design, procurement, and construction without prolonged pauses. When schemes stall, the impact spreads quickly through the supply chain, from earthworks and concrete specialists to drainage, highways, structures, and rail contractors.

The gap between long-term need and short-term workload is becoming harder to ignore. Water resilience, grid connections, rail renewals, road maintenance, flood protection, and low-carbon transport all require sustained construction activity. The market weakness lies not in the absence of work that needs doing, but in the slow conversion of pipeline into funded and released projects.

Commercial construction’s comparatively stronger reading offers limited relief. Offices, logistics, education, healthcare, and industrial buildings continue to provide important workload in parts of the market, but they cannot fully offset a sharp contraction in civils. Housebuilding is also unlikely to recover quickly while developers, buyers, and lenders remain cautious.

Supply chain conditions are less volatile than during the post-pandemic inflation surge, although weaker demand brings its own risks. Lower materials inflation can support pricing, but a thin pipeline can encourage aggressive bidding, lower margins, and greater acceptance of unresolved design or programme risk. Contractors that chase work to maintain turnover may store up commercial problems for later in the project.

Capacity retention is now a central concern. A prolonged downturn in civil engineering can weaken the market just as the country needs to increase delivery. Skilled workers, site managers, specialist subcontractors, and plant operators cannot be held indefinitely against delayed schemes. If capacity moves into other sectors or leaves the industry altogether, any future restart will be slower and more expensive.

Some companies remain positive about future activity, especially where energy, utilities, and regulated sectors provide resilience. That optimism is still below historic norms, and the June figures explain why. Infrastructure construction needs consistent procurement, funded programmes, and credible delivery windows. Without those, the pipeline remains a spreadsheet rather than workload.