The main points:

Monthly construction output is estimated to have fallen by 0.6% in May 2025; this follows three consecutive periods of growth, including an increase of 0.8% in April 2025.
The decrease in monthly output in May 2025 came solely from a decrease in repair and maintenance (2.1% fall), as new work increased by 0.6%.
At the sector level, output in five out of the nine sectors fell in May 2025; the main contributors to the monthly decrease were non-housing repair and maintenance, and private housing repair and maintenance, which fell by 2.4% and 1.8%, respectively.
Total construction output is estimated to have grown by 1.2% in the three months to May 2025; new work increased by 0.9%, and repair and maintenance by 1.5%.

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ONS Construction Output in Great Britain: May Shows First Decrease Since January