Adjusted for calendar effects, output was 15.2% higher than in September 2024, reflecting expansion across both key segments of the industry.
Among the main construction groups, building construction grew by 18.3%, while civil engineering increased by 17.1%. Seasonally and working day–adjusted data showed construction output up 16.4% compared to August 2025, signaling strong month-on-month growth.
In an annual comparison, building construction output expanded by 38.5%, while civil engineering rose by 27.3% from last year’s low base. Specialized construction activities — which carry the largest weight within the industry — recorded a 2.7% year-on-year increase.
However, the volume of new contracts signed in September was 4.8% lower than a year earlier. Contracts for building construction decreased by 4.1%, while civil engineering contracts fell by 5.3%.
At the end of September, the stock of construction contracts stood 40.9% higher than a year before. Within this, the volume of contracts for building construction declined by 15.9%, while contracts for civil engineering surged by 75% compared to September 2024. KSH noted that a scheduled data revision was carried out in September 2025, resulting in retroactive increases in contract volume indices back to January 2025 due to supplier revisions.
Between January and September 2025, construction output volume rose by 1.7% compared to the same period last year, showing a modest overall improvement supported by recent gains.
Construction producer prices increased by 5.5% in the third quarter of 2025 compared to the same period of 2024. Prices rose most significantly — by 6.3% — in specialized construction activities, which have the largest market weight. Civil engineering prices increased by 5.0%, while building construction saw a 4.6% rise.
Compared to the second quarter of 2025, overall construction prices were 0.7% higher, according to KSH.
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