UK Construction Costs Hit 41-Month High as Iran Conflict Disrupts Material Supply Chains
What happened
The UK Construction PMI for March 2026 came in at 51.0 — still in growth territory, but down from February's 51.7 and signalling fragile progress at best.
The headline figure isn't the story. Input cost inflation hit its highest level in 41 months, with 49% of construction firms reporting rising costs — the biggest cost spike since 1992. The driver: the conflict in Iran and closure of the Strait of Hormuz have sent energy, oil, and gas prices surging, feeding directly into material costs across the sector.
Supplier delivery times have also deteriorated to their worst level since mid-2022, as the Middle East disruption combines with broader global supply chain strains to delay materials reaching UK sites. Business optimism fell to a six-month low, and job losses accelerated to the fastest rate since last year as firms respond to rising costs and squeezed margins.
What this means for tradespeople
If you're quoting for jobs right now, your material costs are climbing — and they may keep climbing while the Middle East situation remains unresolved. Timber, copper, plastics, and anything tied to energy prices are all affected.
For sole traders and small firms, this is a margin squeeze. If you quoted a kitchen refit or bathroom install three weeks ago, your material costs may have already shifted. Electricians buying copper cable, plumbers sourcing boilers, and builders ordering structural steel are all feeling the pinch.
The job losses in the wider sector also mean more tradespeople competing for domestic work — exactly the pattern Arcadis warned about last month.
What to do about it
Build a buffer into your quotes for material price volatility — even 5-10% can protect your margins on jobs that take weeks to complete.
When competition increases, your online reputation becomes the differentiator. The tradespeople with strong, recent Google reviews will continue winning work even as the market tightens. If you've been putting off building your review profile, now is the time to start.
TapReview is a £9/month tool that helps UK tradespeople get more Google reviews by sending automated review requests via WhatsApp and SMS after every job.
Source: PBC Today