Norway's largest plumbing contractors
Companies carrying out plumbing work.
The register holds 3 013 plumbing contractors with filed revenue. Together they turn over NOK 38.5bn and employ 16 271 people. The largest is ASSEMBLIN AS, with NOK 1.7bn in revenue. The highest operating result belongs to ASSEMBLIN AS, at NOK 83.4m. The median operating margin is 4.8% across the 852 companies with real trading substance. Most are based in Akershus (467 companies).
3 013Companies
NOK 38.5bnCombined revenue
16 271Employees
4.8%Median operating margin
Ranking
Largest by revenue
Ranked by the most recently reported operating revenue.
#
Company
Amount
1
ASSEMBLIN AS
org.nr 965808752 · Oslo, Oslo
NOK 1.7bn
2
VARME & BAD AS
org.nr 991603344 · Stavanger, Rogaland
NOK 1.6bn
3
ELIQUO PMI AS
org.nr 979671369 · Sandefjord, Vestfold
NOK 1.1bn
4
SIG HALVORSEN AS
org.nr 976700376 · Sandnes, Rogaland
NOK 459.2m
5
ARITECH AS
org.nr 984072325 · Stord, Vestland
NOK 432.3m
6
NORSK TEKNISK INSTALLASJON AS
org.nr 996099881 · Lier, Buskerud
NOK 339.2m
7
ASKIM & MYSEN RØR AS
org.nr 980236226 · Indre Østfold, Østfold
NOK 317.5m
8
SPOT AS
org.nr 821116422 · Skien, Telemark
NOK 299.7m
9
CHR M VESTRHEIM AS
org.nr 917154678 · Bergen, Vestland
NOK 270.4m
10
EGELAND RØR AS
org.nr 987760605 · Kristiansand, Agder
NOK 238.9m
11
K LUND AS
org.nr 917810346 · Trondheim, Trøndelag
NOK 237.9m
12
ANDERS O GREVSTAD AS
org.nr 977052033 · Bergen, Vestland
NOK 218.0m
13
GRAN VVS AS
org.nr 985249962 · Tønsberg, Vestfold
NOK 216.1m
14
VEAS RØR AS
org.nr 812481312 · Drammen, Buskerud
NOK 182.6m
15
IPC AS
org.nr 996313018 · Flekkefjord, Agder
NOK 182.3m
16
MIDBØE AS
org.nr 951838756 · Stavanger, Rogaland
NOK 171.6m
17
CHRISTIANIA RØRLEGGERBEDRIFT AS
org.nr 912069370 · Oslo, Oslo
NOK 169.3m
18
BWT BIRGER CHRISTENSEN AS
org.nr 911031329 · Asker, Akershus
NOK 169.2m
19
GREVSTAD & TVEDT VVS AS
org.nr 920215742 · Bergen, Vestland
NOK 168.9m
20
RØRCOMPANIET AS
org.nr 989707833 · Sarpsborg, Østfold
NOK 168.0m
21
BRYNE RØR AS
org.nr 886293372 · Time, Rogaland
NOK 168.0m
22
HAUG OG RUUD VVS AS
org.nr 914737613 · Lillehammer, Innlandet
NOK 165.8m
23
ÅGE NILSEN AS
org.nr 980860825 · Tromsø, Troms
NOK 164.6m
24
ENERGIMA PROSJEKT AS
org.nr 995861186 · Bærum, Akershus
NOK 164.5m
25
OSLO-AKERSHUS RØRLEGGERBEDRIFT AS
org.nr 994920790 · Oslo, Oslo
NOK 159.5m
Showing 25 companies
Ranking
Most profitable
Ranked by the most recently reported operating profit (EBIT).
#
Company
Amount
1
ASSEMBLIN AS
org.nr 965808752 · Oslo, Oslo
NOK 83.4m
2
ELIQUO PMI AS
org.nr 979671369 · Sandefjord, Vestfold
NOK 56.2m
3
RØRCOMPANIET AS
org.nr 989707833 · Sarpsborg, Østfold
NOK 43.0m
4
LINDÅS VVS NILS TRÆLAND AS
org.nr 915836445 · Alver, Vestland
NOK 32.2m
5
SP SPRINKLER AS
org.nr 934670655 · Ullensaker, Akershus
NOK 31.7m
6
SIG HALVORSEN AS
org.nr 976700376 · Sandnes, Rogaland
NOK 31.0m
7
KARMØY RØRTEKNIKK AS
org.nr 993234532 · Karmøy, Rogaland
NOK 25.2m
8
VVS - INSTALLASJON AS
org.nr 979542275 · Sortland, Nordland
NOK 24.7m
9
SPOT AS
org.nr 821116422 · Skien, Telemark
NOK 22.8m
10
ARITECH AS
org.nr 984072325 · Stord, Vestland
NOK 22.8m
11
IPC AS
org.nr 996313018 · Flekkefjord, Agder
NOK 22.7m
12
ASKIM & MYSEN RØR AS
org.nr 980236226 · Indre Østfold, Østfold
NOK 22.7m
13
ANDERSEN OG AKSNES RØRLEGGERBEDRIFT AS
org.nr 911978261 · Asker, Akershus
NOK 19.2m
14
ØSTLANDSKE VVS AS
org.nr 984235763 · Oslo, Oslo
NOK 18.3m
15
RØRTEFT AS
org.nr 975983862 · Lillestrøm, Akershus
NOK 17.5m
16
OSLO-AKERSHUS RØRLEGGERBEDRIFT AS
org.nr 994920790 · Oslo, Oslo
NOK 16.5m
17
EXODRAFT NUF
org.nr 990875715 · Drammen, Buskerud
NOK 16.3m
18
ANDENÆS VVS AS
org.nr 963031130 · Oslo, Oslo
NOK 16.1m
19
EGELAND RØR AS
org.nr 987760605 · Kristiansand, Agder
NOK 15.6m
20
VEAS RØR AS
org.nr 812481312 · Drammen, Buskerud
NOK 15.1m
21
OL TO VVS AS
org.nr 983232108 · Vennesla, Agder
NOK 14.6m
22
BERGEN RØRTEKNIKK AS
org.nr 993231150 · Bergen, Vestland
NOK 14.0m
23
GREVSTAD & TVEDT VVS AS
org.nr 920215742 · Bergen, Vestland
NOK 14.0m
24
ENERGIMA ROMERIKE AS
org.nr 992684496 · Lillestrøm, Akershus
NOK 13.2m
25
NORSK TEKNISK INSTALLASJON AS
org.nr 996099881 · Lier, Buskerud
NOK 13.1m
Showing 25 companies
Ranking
Highest operating margin
Operating profit as a percentage of revenue. Only companies with at least 5 employees and more than NOK 5m in revenue.
#
Company
Operating margin
1
SP SPRINKLER AS
org.nr 934670655 · Ullensaker, Akershus
62.6%
2
BAD & BYGG VVS OSLO AS
org.nr 834928892 · Oslo, Oslo
35.7%
3
VVS - INSTALLASJON AS
org.nr 979542275 · Sortland, Nordland
34.2%
4
LINDÅS VVS NILS TRÆLAND AS
org.nr 915836445 · Alver, Vestland
32.2%
5
SPYLETEKNIKK AS
org.nr 829593262 · Hadsel, Nordland
30.7%
6
NORD INDUSTRIRØR AS
org.nr 822277292 · Rana, Nordland
30.0%
7
ARENDAL RØR AS
org.nr 832306142 · Arendal, Agder
27.2%
8
RØRLEGGER EVENSEN AS
org.nr 927112248 · Øksnes, Nordland
26.9%
9
VOLLA RØR AS
org.nr 958376030 · Lillestrøm, Akershus
26.9%
10
RØRET SVEIS AS
org.nr 932318024 · Sarpsborg, Østfold
26.8%
11
AQUA RØRFORNYING AS
org.nr 925568201 · Trondheim, Trøndelag
25.9%
12
RØRCOMPANIET AS
org.nr 989707833 · Sarpsborg, Østfold
25.6%
13
JENSEN RØRSERVICE AS
org.nr 922099081 · Jevnaker, Akershus
25.5%
14
SAMDAL RØR AS
org.nr 945889314 · Bjørnafjorden, Vestland
24.9%
15
KARMØY RØRTEKNIKK AS
org.nr 993234532 · Karmøy, Rogaland
24.7%
16
RØRLEGGER TITLESTAD AS
org.nr 927834448 · Bjørnafjorden, Vestland
24.3%
17
ANOR AS
org.nr 998743060 · Holmestrand, Vestfold
23.8%
18
RØRLEGGERFIRMA HANØY AS
org.nr 986892729 · Austevoll, Vestland
23.4%
19
LYNGEN RØR AS
org.nr 913882776 · Lyngen, Troms
23.3%
20
RØRLEGGERFIRMA LIEN & CO AS
org.nr 977054664 · Vestre Toten, Innlandet
22.7%
21
SJURELV RØR AS
org.nr 926120492 · Tromsø, Troms
22.6%
22
T. OLSEN RØR AS
org.nr 931527150 · Målselv, Troms
21.6%
23
SALTDAL RØR OG ENTREPRENØR AS
org.nr 874354902 · Saltdal, Nordland
20.9%
24
STENDAL VVS AS
org.nr 980626180 · Alver, Vestland
20.7%
25
INDRE ØSTFOLD VENTILASJON AS
org.nr 967647675 · Indre Østfold, Østfold
20.7%
Showing 25 companies
Ranking
Largest employers
Ranked by registered headcount.
#
Company
Employees
1
VARME & BAD AS
org.nr 991603344 · Stavanger, Rogaland
846
2
ASSEMBLIN AS
org.nr 965808752 · Oslo, Oslo
665
3
SIG HALVORSEN AS
org.nr 976700376 · Sandnes, Rogaland
245
4
ARITECH AS
org.nr 984072325 · Stord, Vestland
236
5
CHR M VESTRHEIM AS
org.nr 917154678 · Bergen, Vestland
163
6
NORSK TEKNISK INSTALLASJON AS
org.nr 996099881 · Lier, Buskerud
163
7
ELIQUO PMI AS
org.nr 979671369 · Sandefjord, Vestfold
159
8
ASKIM & MYSEN RØR AS
org.nr 980236226 · Indre Østfold, Østfold
156
9
EGELAND RØR AS
org.nr 987760605 · Kristiansand, Agder
154
10
K LUND AS
org.nr 917810346 · Trondheim, Trøndelag
135
11
SPOT AS
org.nr 821116422 · Skien, Telemark
121
12
ANDERS O GREVSTAD AS
org.nr 977052033 · Bergen, Vestland
102
13
GRAN VVS AS
org.nr 985249962 · Tønsberg, Vestfold
97
14
VEAS RØR AS
org.nr 812481312 · Drammen, Buskerud
95
15
OLAF B TERJESEN AS
org.nr 936016081 · Færder, Vestfold
92
16
VVS KONTAKTEN AS
org.nr 922531897 · Oslo, Oslo
89
17
MIDBØE AS
org.nr 951838756 · Stavanger, Rogaland
87
18
BRATTÅS AS
org.nr 980334511 · Oslo, Oslo
86
19
ERV TEKNIKK AS
org.nr 990634289 · Lyngdal, Agder
86
20
RØR SYSTEM AS
org.nr 996754316 · Oslo, Oslo
86
21
CHRISTIANIA RØRLEGGERBEDRIFT AS
org.nr 912069370 · Oslo, Oslo
85
22
YC AMUNDRUD AS
org.nr 925552550 · Elverum, Innlandet
83
23
HELLAND RØR AS
org.nr 986652132 · Vestnes, Møre og Romsdal
80
24
FLATAKER GRUPPEN AS
org.nr 963443811 · Molde, Møre og Romsdal
72
25
GREVSTAD & TVEDT VVS AS
org.nr 920215742 · Bergen, Vestland
70
Showing 25 companies
Geography
Where plumbing contractors are based
County
Number of companiesActivity codes included
This industry gathers the following SN2007 activity codes. Each code also has its own overview page.
About the figures
Figures are the latest annual accounts filed with the Register of Company Accounts, matched to the activity code the company carries in the Central Coordinating Register. A company lands in an industry on the strength of that registered code, not an assessment of what it actually does.
The operating-margin list and the median use only the 852 companies with at least 5 employees and over 5 mill. kr in revenue, so a small company with erratic figures cannot top the list.
1 companies are held out because their operating margin exceeds 75% – far above the norm for this industry. That is almost always a wrong activity code or fair-value gains booked as operating revenue, not trading.
Biztrac.no · Data from the Brønnøysund Register Centre and the Norwegian Tax Administration · Last updated 02.09.2026.
Changes
Latest changes among plumbing contractors
16.09.2026
SALIMI BYGG ENTREPRENØR
org.nr 925033170 · Nittedal, Akershus
Address change
16.09.2026
KNUT WILLIAM BYGLAND
org.nr 921767080 · Bygland, Agder
Struck off the register
16.09.2026
OVS AS
org.nr 919863609 · Indre Østfold, Østfold
Activity code change
15.09.2026
CRB HOLDING AS
org.nr 988312509 · Oslo, Oslo
Struck off the register
15.09.2026
ANDERSEN BYGG OG VVS AS
org.nr 930732419 · Bjørnafjorden, Vestland
Struck off the register
15.09.2026
ANDERSEN AUTORISERT RØRLEGGER AS
org.nr 999337422 · Asker, Akershus
Struck off the register
Other industries
These lists show actual registered figures from public sources (the Brønnøysund registers). They are not an assessment of creditworthiness, solidity or suitability as a customer, supplier or investment. Figures are for the most recently reported financial year.