Infrastructure output fell by 2.5% in February, according to official statistics.
All new private construction work also suffered a decline, and while public work did not fall, overall construction output in February was down 0.9% compared with the first month of the year.
Output is the measure the government uses to describe the state of the industry and is defined as the amount charged by construction companies to customers.
Both new work and repair and maintenance contributed to the fall – new work decreased by 0.6%, and repair and maintenance fell by 1.4%.
The figures show industry has dropped off compared with the same period last year – output in the construction industry showed a decrease of 1.3%, repair and maintenance fell by 4.3% and new work increased by 0.5%.