Sara-4 DOOEL was founded in 1995 in Skopje by the civil engineer Sonja Apostolova as a design company. The core business of Sara-4 was design of residential and non-residential facilities intended for housing, industrial and commercial buildings.

EHI is a specialized company which principal business is construction, design, reconstruction and renovation of water supply and sewerage systems, pump and filter stations, reservoirs, irrigation and drainage systems, water treatment plants as well as other hydro-technical facilities. Our company disposes of experienced and qualified personnel and equipment for successful solutions also of the most complex situations related to the realization of these constructions.

REHAU initiates contributions to the environmental and economic benefits for the future.

ARS- ENGINEERING is a licensed company for the performance of work in the field of design, audit and supervision. These three elements in the process of construction are the most important parameters for economical and successful leadership during the procedure of the construction.