Industry code 43 · Telemark
Specialised construction activities in Porsgrunn
There are 261 active companies in specialised construction activities in Porsgrunn. 23 of them were registered in the last 12 months. Together they have 943 registered employees. The largest company is Laugstol AS with 135 employees. The oldest, Isola Holding AS, was founded in 1968. 53% are limited companies.
- Active companies
- 261
- New in the last 12 months
- 23
- Registered employees
- 943
- Share of limited companies
- 53 %
The largest companies in specialised construction activities in Porsgrunn
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 | Laugstol AS | 964715378 | 135 | NOK 427 m | 1992 |
| 2 | Set Linings International S. A. | 993823317 | 104 | NOK 21.8 m | – |
| 3 | Telerør A/S | 946858021 | 68 | NOK 121.6 m | 1988 |
| 4 | Beerenberg Industri AS | 974472902 | 67 | NOK 147.7 m | 1995 |
| 5 | Eltera Skagerrak AS | 918672567 | 45 | NOK 95 m | 2017 |
| 6 | Telerør Elektro AS | 928978192 | 43 | NOK 49.9 m | 2022 |
| 7 | Eckholdt AS | 948191660 | 39 | NOK 99.2 m | 1988 |
| 8 | Norsk Områdesikring AS | 997362470 | 35 | NOK 51.7 m | 2011 |
| 9 | Mestertak AS | 928489701 | 31 | NOK 99 m | 2021 |
| 10 | Team Energy AS | 919706430 | 29 | NOK 4.7 m | 2017 |
| 11 | Norsk Sprinklerteknikk AS | 919847816 | 27 | NOK 38 m | 2017 |
| 12 | J.m Bygg Montasje AS | 924567260 | 26 | NOK 17.4 m | 2020 |
| 13 | Telemark Entreprenørservice AS | 933509524 | 26 | NOK 52.7 m | 1983 |
| 14 | Porsgrunn Rørleggerforretning AS | 924001216 | 22 | NOK 47.5 m | 1987 |
| 15 | Isofag AS | 925392820 | 20 | NOK 7.7 m | 2020 |
| 16 | Totalriv AS | 923829407 | 19 | NOK 27.9 m | 2019 |
| 17 | Teleklima AS | 990330255 | 19 | NOK 54.6 m | 2006 |
| 18 | Ole Jonny Madsen Maskinentreprenør AS | 922558337 | 17 | NOK 33.7 m | 1976 |
| 19 | Halvorsli Fjell Og Grunn AS | 934355733 | 15 | NOK 8.5 m | 1983 |
| 20 | Profil Montasje AS | 992506660 | 15 | NOK 52.8 m | 2008 |
| 21 | Uni Tak AS | 912235319 | 13 | NOK 28.3 m | 2013 |
| 22 | Murmester Gulliksen AS | 961560446 | 12 | NOK 33.6 m | 1991 |
| 23 | Lindkjenn AS | 866526362 | 10 | NOK 11.1 m | 1993 |
| 24 | Stabil Varme Service AS | 998726530 | 10 | NOK 31.3 m | 2012 |
| 25 | Tekk AS | 884024242 | 9 | NOK 17.6 m | 2001 |
Newest companies in specialised construction activities in Porsgrunn
- Atle Simonsen AS Tvangsavviklingsbo15 Oct 2026
- Servicefix Ter Hovhannisyan13 Oct 2026
- Gauslaa Silica Concrete2 Oct 2026
- Uni Tak AS1 Oct 2026
- Mikael Sundby Johnsen18 Sept 2026
- Elektrohjelpen Leonardsen18 Sept 2026
- Ajk Elektro AS15 Sept 2026
- Tømrer Ludvig Bonnet Stulen28 Aug 2026
- Severinsen Lag Og Fiks17 Jun 2026
- Lindgren Service1 Jun 2026
Frequently asked questions
How many companies in specialised construction activities are there in Porsgrunn?
The Register of Legal Entities lists 261 active companies in specialised construction activities in Porsgrunn. 23 of them were registered in the last 12 months.
Which is the largest company in specialised construction activities in Porsgrunn?
Laugstol AS is the largest by number of employees, with 135 employees. The organisation number is 964715378.
How many people work in specialised construction activities in Porsgrunn?
The companies have 943 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 Porsgrunn?
The oldest active company, Isola Holding AS, was founded in 1968. 53% of the companies are limited companies.
Explore further
Specialised construction activities in nearby municipalities
Sub-industries in Porsgrunn
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.