Industry code 43 · Oslo
Specialised construction activities in Oslo
There are 4,153 active companies in specialised construction activities in Oslo. 352 of them were registered in the last 12 months. Together they have at least 25,948 registered employees. The largest company is Bravida Norge AS with 3,375 employees. The oldest, S B Pettersen Elektro AS, was founded in 1914. 48% are limited companies.
- Active companies
- 4,153
- New in the last 12 months
- 352
- Registered employees
- ≥ 25,948
- Share of limited companies
- 48 %
The largest companies in specialised construction activities in Oslo
Sorted by number of employees. Figures are from the Register of Legal Entities and the Register of Company Accounts.
| # | Company | Org. no. | Employees | Revenue | Founded |
|---|---|---|---|---|---|
| 1 | Bravida Norge AS | 987582561 | 3,375 | NOK 5.7 bn | 2004 |
| 2 | Gk Norge AS | 915892981 | 1,845 | NOK 4.8 bn | 2015 |
| 3 | Caverion Norge AS | 959069743 | 1,821 | NOK 3.8 bn | 1990 |
| 4 | Recover AS | 995761440 | 951 | NOK 1.9 bn | 2010 |
| 5 | Assemblin AS | 965808752 | 670 | NOK 1.7 bn | 1992 |
| 6 | Oneco Elektro AS | 996669173 | 622 | NOK 2 bn | 2011 |
| 7 | Oneco Networks AS | 987210001 | 565 | NOK 1.4 bn | 2004 |
| 8 | Kone Aksjeselskap | 918201548 | 354 | NOK 913 m | 1973 |
| 9 | Relokator AS | 913141784 | 298 | NOK 294.4 m | 2014 |
| 10 | Tk Elevator Norway AS | 828447742 | 186 | NOK 405.3 m | 1975 |
| 11 | Belfor Norway AS | 884367522 | 176 | NOK 350.2 m | 2002 |
| 12 | Aip Maskin AS | 928857964 | 167 | NOK 117.3 m | 2022 |
| 13 | Lysteknikk Elektroentreprenør AS | 995971135 | 162 | NOK 330.4 m | 2010 |
| 14 | Otis AS | 919419105 | 147 | NOK 399.3 m | 1973 |
| 15 | Assa Abloy Entrance Systems Norway AS | 919496126 | 147 | NOK 487.4 m | 1970 |
| 16 | Ellingard AS | 971155949 | 146 | NOK 286.2 m | 1994 |
| 17 | Nrs AS | 917780595 | 144 | NOK 201.7 m | 2016 |
| 18 | Datek Installasjon AS | 916110529 | 143 | NOK 174.4 m | 2015 |
| 19 | Af Decom AS | 992097442 | 139 | NOK 689.3 m | 2007 |
| 20 | Østerås Bygg AS | 918599215 | 136 | NOK 154.1 m | 2016 |
| 21 | Therma Industri AS | 991863796 | 134 | NOK 439.3 m | 2007 |
| 22 | Rør System AS | 996754316 | 134 | NOK 117.9 m | 2011 |
| 23 | Keller Geoteknikk AS | 922736340 | 130 | NOK 575 m | 2019 |
| 24 | Randem & Hübert AS | 989653245 | 129 | NOK 560.3 m | 2006 |
| 25 | Geo Fundamentering & Bergboring AS | 926836854 | 126 | NOK 576.9 m | 2021 |
Newest companies in specialised construction activities in Oslo
- Vaza AS5 Nov 2026
- Nikoflis AS5 Nov 2026
- Bygg Power AS Konkursbo4 Nov 2026
- Rørværk AS4 Nov 2026
- Altin Bygg & Maler Thaqi3 Nov 2026
- Thl Entreprenør AS Konkursbo29 Oct 2026
- Snekker Tallerud28 Oct 2026
- Nye El-Installasjon AS28 Oct 2026
- Ntina-Ndina Malerservice28 Oct 2026
- Grepa Byggservice AS Konkursbo27 Oct 2026
Frequently asked questions
How many companies in specialised construction activities are there in Oslo?
The Register of Legal Entities lists 4,153 active companies in specialised construction activities in Oslo. 352 of them were registered in the last 12 months.
Which is the largest company in specialised construction activities in Oslo?
Bravida Norge AS is the largest by number of employees, with 3,375 employees. The organisation number is 987582561.
How many people work in specialised construction activities in Oslo?
The companies have at least 25,948 registered employees in total. The figures are based on employee counts in the Register of Legal Entities, and 25 of the 25 largest companies have reported employees.
How long have there been companies in specialised construction activities in Oslo?
The oldest active company, S B Pettersen Elektro AS, was founded in 1914. 48% of the companies are limited companies.
Sub-industries in Oslo
- 43.3 Building completion and finishing (2,241)
- 43.2 Electrical, plumbing and other construction installation activities (1,255)
- 43.9 Other specialised construction activities (328)
- 43.1 Demolition and site preparation (199)
- 43.4 Specialised construction activities related to building construction (113)
- 43.6 Intermediary services for specialised construction activities (9)
- 43.5 Specialised construction activities related to civil engineering (8)
Source: the Register of Legal Entities and the Register of Company Accounts. The overview shows active companies registered in the municipality with industry code 43. Figures are updated continuously.