| Nace | Description | Number of Company |
|---|---|---|
| 42.11.01 | Construction of motorways, roads, urban roads and other vehicular or pedestrian ways | 592 |
| 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., | 614 |
| 42.11.03 | Airport runway construction | 21 |
| 42.12.01 | Construction of railways and subways (including repair and maintenance) | 115 |
| 42.13.01 | Bridge construction (including elevated highways-viaducts) | 102 |
| 42.13.02 | Tunnel construction | 66 |
| 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) | 114 |
| 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)) | 281 |
| 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) | 93 |
