Reconstruction of an existing building that is more than 200 years old in an attractive location by the river Cetina and conversion into a hostel WTL Trilj. It is a building of approx. 1500 m2 gross. 3B engineering had the role of project manager. Demanding construction and crafts work, repairs and strengthening of the existing wall by grouting were carried out. All mezzanine panels were changed and a completely new network of both electrical and mechanical installations was created.