The latest Plumbing and Heating Merchant Index (PHMI) report shows like-for-like value sales (no difference in trading days) for August 2026 through specialist plumbing and heating merchants were +1.8% higher than August 2025. But, year-on-year, like-for-like volume sales decreased -5.4%, while prices increased +7.6%.
Compared to July, August like-for-like value sales were +1.1% higher. Like-for-like volume sales increased +1.6% month-on-month but prices decreased -0.5%. With three fewer trading days in August, unadjusted value sales were down -12.0%. Unadjusted volume sales fell -11.6% and prices decreased -0.5%.
Like-for-like value sales in the three-months from June to August 2026 were +0.2% up on the same period the year before. Like-for-like volumes sales, however, were down -8.5% and prices increased +9.5%. With one extra trading day in the latest three-month period, unadjusted value sales were up +1.8%. Unadjusted volume sales dropped -7.1% but prices increased +9.5%.
Compared to the previous three-months (March to May 2026), June to August 2026 like-for-like value sales were down -9.4%. Like-for-like volume sales were -9.8% lower and prices +0.4% higher. With four more trading days in the most recent three-month period, unadjusted value sales were -3.5% lower. Unadjusted volume sales were down -3.9% while prices were up +0.4%.
Plumbing & Heating merchants' like-for-like value sales in the 12 months from September 2025 to August 2026 were +0.5% higher than the previous 12 months (September 2024 to August 2025). Like-for-like volume sales were -5.1% down, and prices rose +5.9%. With one extra trading day in the most recent 12-month period, unadjusted value sales increased +0.9%. Unadjusted volume sales were down -4.7%, while prices were up +5.9%.
In the first eight months of 2026, year-to-date like-for-like value sales were up +0.2% compared with the same eight months of 2025.
Mike Rigby, Managing Director of MRA Research which produces the PHMI report, said: "The latest ONS construction data reveals that construction output has fallen for four consecutive months, down -0.2% in August. The ONS has revised its July output figure of +0.1% up, to -0.5% down as more data became available. Private housebuilding's output has dropped -3.2% over the past three months, and down -1.9% in August, is depressing total construction output.
"While housebuilding is struggling, further encumbered by extra costs and regulations casually imposed by government – the House Builders Federation calculates they add an extra £38,030 to the average cost of a new build home – the UK economy is showing remarkable resilience.
The latest ONS figures suggest GDP increased +0.1% in August. Annually, the economy has grown +2.1% – it's strongest rate since August 2022. The IMF's latest forecast puts Britain's growth equal second among the G7 group of advanced economies, after the US economy which is storming. Our national media and politicians are so used to talking Britain down that they're surprised by such confidence in the UK."
