Every activity (KD 2010 class) in the sector in 2025: companies, employees, revenue, profit and margin.
The aggregate margin is not shown when fewer than 5 companies have one, or when one company carries more than half of the summed profit and loss; use the median margin and the profitable share instead. Profits that cannot be reconciled with revenue and payroll are left out.
The activity title is the code's title in the KD 2010 classification (NACE Rev. 2), which applies to every year shown. The registry now shows titles from the new classification for the same codes, so titles can differ.
| 4391 | Roofing activities | 21 | 214 | 9,250,140€ | 473,962€ | Not shown: one company carries more than half of the profit or loss | 0.1% | 52.4% |
| 4332 | Joinery installation | 83 | 235 | 11,903,882€ | 411,691€ | 3.5% | 1.7% | 57.8% |
| 4221 | Construction of utility projects for fluids | 16 | 79 | 12,245,802€ | 616,248€ | 5.0% | 8.0% | 87.5% |
| 4222 | Construction of utility projects for electricity and telecommunications | 29 | 165 | 13,696,775€ | -60,662€ | -0.4% | 1.0% | 51.7% |
| 4212 | Construction of railways and underground railways | 2 | 812 | 17,807,462€ | -4,010,729€ | Not shown: fewer than 5 companies with a margin | — | 0.0% |
| 4329 | Other construction installation | 64 | 184 | 20,931,335€ | 2,061,349€ | 9.8% | 2.7% | 48.4% |
| 4299 | Construction of other civil engineering projects n.e.c. | 81 | 211 | 23,643,984€ | -95,304€ | -0.4% | -1.0% | 30.9% |
| 4312 | Site preparation | 119 | 332 | 26,412,453€ | 3,303,484€ | 12.5% | 3.8% | 55.5% |
| 4110 | Development of building projects | 154 | 365 | 29,728,428€ | -3,120,203€ | -10.5% | -14.2% | 22.4% |
| 4291 | Construction of water projects | 23 | 106 | 32,131,723€ | 5,555,662€ | 17.3% | 15.2% | 60.9% |
| 4333 | Floor and wall covering | 235 | 591 | 35,214,359€ | 2,142,876€ | 6.1% | 3.6% | 53.2% |
| 4213 | Construction of bridges and tunnels | 11 | 80 | 51,498,196€ | 36,428,322€ | Not shown: one company carries more than half of the profit or loss | 9.3% | 45.5% |
| 4339 | Other building completion and finishing | 330 | 910 | 66,553,148€ | 3,057,893€ | 4.6% | 2.3% | 47.1% |
| 4322 | Plumbing, heat and air-conditioning installation | 258 | 1,061 | 92,803,124€ | 9,330,928€ | 10.1% | 3.1% | 55.4% |
| 4399 | Other specialised construction activities n.e.c. | 491 | 1,585 | 97,221,438€ | 5,766,029€ | 5.9% | 3.2% | 50.1% |
| 4321 | Electrical installation | 327 | 1,894 | 139,032,823€ | 9,044,977€ | 6.5% | 2.3% | 53.5% |
| 4211 | Construction of roads and motorways | 86 | 2,453 | 179,532,986€ | 8,230,523€ | 4.6% | 4.2% | 59.3% |
| 4120 | Construction of residential and non-residential buildings | 1,855 | 7,732 | 1,171,418,644€ | 82,643,872€ | 7.1% | 2.1% | 34.4% |