| Nace | Description | Number of Company |
|---|---|---|
| 42.11.01 | Construction of motorways, roads, urban roads and other vehicular or pedestrian ways | 616 |
| 42.11.02 | Surface works at roads, tunnels, etc. such as asphalting and repair road surfaces, construction of pavements, bumps, bike paths, etc., marking surfaces of roads, etc. by paint, installation of road barriers, traffic signs and plates etc., | 639 |
| 42.11.03 | Airport runway construction | 21 |
| 42.12.01 | Construction of railways and subways (including repair and maintenance) | 121 |
| 42.13.01 | Bridge construction (including elevated highways-viaducts) | 104 |
| 42.13.02 | Tunnel construction | 67 |
| 42.21.01 | Construction of long distance pipelines for fluids (long-distance pipelines on land and under sea for transportation of oil products and gas and transportation of other products) | 118 |
| 42.21.02 | Water well drilling and septic system installation activities (wells, artesian wells, etc.) | 39 |
| 42.21.03 | Construction of main water mains and water lines as well as water treatment plants, sewage disposal plants and pumping stations (including irrigation systems (canals)) | 293 |
| 42.21.05 | Fluid short distance (local) construction of pipelines (oil products and gas transportation and water, sewer, hot water, steam and other short-distance pipeline for transportation of products) | 97 |
| 42.22.01 | Construction of long-distance electricity power lines (long-distance high-voltage electric transmission lines and long-distance overground / underground or undersea transmission lines) | 473 |
| 42.22.02 | Construction of power plants (hydroelectric power plants, thermal power plants, nuclear power generation plants, etc.) | 626 |
| 42.22.04 | Construction of urban (short distance) power lines (transformer stations and distribution sub-stations etc. within the local boarders) | 153 |
| 42.22.06 | Construction of long-distance telecommunication (communication) lines,( (long-distance telecommunication transmission lines overground / underground or undersea transmission lines) | 39 |
| 42.22.07 | Construction of urban (short distance) telecommunication(communication) lines (transformer stations, transmisiion towers including antenna and distribution sub-stations etc. within the local boarders) | 56 |
| 42.91.01 | Construction of coastal and port buildings and construction of related hydro-mechanical structures (structures such as water ways, ports and marinas, coastal arrangements, piers and wharves, breakwaters, channels etc.) | 149 |
| 42.91.02 | Screening and cleaning of the water and ground water (sea, rivers, lakes, etc.) | 46 |
| 42.91.03 | Construction of shipyards, docks and canal pools (for shipbuilding and repair) | 77 |
| 42.91.04 | Construction of dams and dykes | 31 |
| 42.99.03 | Construction of other structures not elsewhere classified (including land improvement by parceling; except parceling without improvement) | 225 |
| 43.12.01 | Soil and land preparation, land cleaning and excavation and earthmoving works (agricultural land preparation, blasting and rock removal, drainage, earthworks, excavation, filling, etc. works of construction, agriculture, etc. fields) (excep | 3089 |
| 43.13.01 | Test drilling and boring (test drilling and boring and sampling drilling for construction, geophysical, geological, etc. purposes) (except drilling tests carried out in conjunction with mining) | 196 |
| 43.99.02 | Underground works (including vertical gallery and well drilling activities for mining, storage, etc.; except water well drilling) | 78 |
