Latest results show group pre-tax profit rose to €52.7m from €40.6m last time despite a dip in turnover to €3,145m from €3,404m.
Overall the construction giant saw profit margins edge up to 1.7% from 1.2%.
Results for the UK show pre-tax profits hit €22.2m from €18.2m on turnover down to €926m from €1,057m.
Commenting on the civil engineering sector BAM said: “All countries were profitable in the second quarter, with a strong contribution from the UK including some final account settlements.
“The order book rose by nearly €0.3billion to €4.2 billion. The increase was driven by the UK.”
Rob van Wingerden, CEO of Royal BAM Group said: “In the UK, our performance and short term outlook remain solid and we are closely monitoring market developments.”