VDH offered the second-lowest price but received the highest mark on the technical criteria, Sofia municipality said in a filing to the public procurement agency last week.
A tie-up led by construction company Trace Group Hold [BUL:T57] offered the lowest price - of 39.9 million levs.
The tender attracted offers from four other bidders, two of which were disqualified.
(1 euro = 1.95583 levs)