New construction works declined 8.1% on the year in January to June, while maintenance and repair works were down 1.4%, INS data showed.
On the other hand, capital repair works rose 6% in the first half compared with the same period of 2010.
The data are adjusted for number of working days and seasonality factors.
By destination, non-residential constructions increased 6.2% on the year in January to June. However, residential and civil engineering constructions declined 20.9% and 1.9% on the year, respectively.
In June alone, adjusted construction works fell 1.3% on the month and were down 11.3% on the year, the data showed.
In unadjusted data, construction works rose 27.3% on the month in June, but decreased by 11.4% compared with the same month of 2010. In the first six months, unadjusted constructions fell 5% from the year-earlier period.