Company lists · Data refreshed September 2026

Top 21 Commercial building decarbonization firms based in Norway

RevenueBase identified 37 commercial building decarbonization firms headquartered in Norway as of September 2026 and tracks 1,607 professional contacts across them, including 613 with verified work emails. Oslo is the largest hub.

This list covers commercial building decarbonization firms headquartered in Norway, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review
37Companies
1,607Contacts tracked
613Verified emails
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The 21 largest commercial building decarbonization firms based in Norway

Ranked by team size
Top 21 of 37 commercial building decarbonization firms based in Norway, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to commercial building decarbonization firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceOslo, NorwayHQ checked Sep 16, 20261,001-5,0001,150 contacts →

Indirect evidence

“GK er en ledende teknisk entreprenør og servicepartner.”

Source: RevenueBase Database · checked Sep 16, 2026
2Indirect evidenceOslo, NorwayHQ checked Sep 16, 202651-20079 contacts →

Indirect evidence

“Specialists in thermal energy.”

Source: RevenueBase Database · checked Sep 16, 2026
3Indirect evidenceTrondheim, NorwayHQ checked Sep 16, 202651-20051 contacts →

Indirect evidence

“Entro is an energy- and environmental consultancy firm with two clients – our customers and the environment.”

Source: RevenueBase Database · checked Sep 16, 2026
4Indirect evidenceOslo, NorwayHQ checked Sep 16, 202611-5049 contacts →

Indirect evidence

“We decarbonize process heat.”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceOslo, NorwayHQ checked Sep 16, 202611-5033 contacts →

Indirect evidence

“For over two decades, Ecohz has pioneered the world of renewable electricity.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceBergen, NorwayHQ checked Sep 16, 202651-20025 contacts →

Indirect evidence

“Gjennom bransjekunnskap, nytenkning og engasjement skal vi tilby energieffektive systemer og tekniske løsninger som øker lønnsomheten og komforten i kommersiell bygningsdrift.””

Source: RevenueBase Database · checked Sep 16, 2026
7Indirect evidenceLysaker, NorwayHQ checked Sep 16, 202611-5022 contacts →

Indirect evidence

“EvoTek tilbyr rådgivingstjenester innenfor energirådgivning, byggherretjenester og tverrfaglig teknisk rådgivning.”

Source: RevenueBase Database · checked Sep 16, 2026
8Indirect evidenceOslo, NorwayHQ checked Sep 16, 202611-5021 contacts →

Indirect evidence

“Accelerating Sustainable Evolution – Join Us on Our Journey!”

Source: RevenueBase Database · checked Sep 16, 2026
9Indirect evidenceGrimstad, NorwayHQ checked Sep 16, 202611-5015 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
10Indirect evidenceSandefjord, NorwayHQ checked Sep 16, 202611-5010 contacts →

Indirect evidence

“Termoenergi Norge AS er spesialister på energisparende tiltak innen byggenæringen.#Energimerking #Energirådgivning #Energivurdering tekniske anlegg, Bygningsfysisk prosjektering…”

Source: RevenueBase Database · checked Sep 16, 2026
11Indirect evidenceOslo, NorwayHQ checked Sep 16, 20261-108 contacts →

Indirect evidence

“Variable helps businesses decarbonize their value chain to discover new opportunities for sustainable growth.”

Source: RevenueBase Database · checked Sep 16, 2026
12Indirect evidenceSkodje, NorwayHQ checked Sep 16, 20261-106 contacts →

Indirect evidence

“Vi tar oss av alt som har med energisparing for din bedrift.”

Source: RevenueBase Database · checked Sep 16, 2026
13Strong evidenceOslo, NorwayHQ checked Sep 16, 20261-106 contacts →

Strong evidence

“Smartwatt slashes the energy consumption of commercial buildings with our AI-powered SaaS for monitoring and AI-supported controlling of HVAC systems.”

Source: RevenueBase Database · checked Sep 16, 2026
14Indirect evidenceOslo, NorwayHQ checked Sep 16, 20261-105 contacts →

Indirect evidence

“Eier eller drifter du næringsbygg?”

Source: RevenueBase Database · checked Sep 16, 2026
15Indirect evidenceOslo, NorwayHQ checked Sep 16, 20261-103 contacts →

Indirect evidence

“OF Energi eier og drifter lokale energisentraler til bolig- og næringsbygg.”

Source: RevenueBase Database · checked Sep 16, 2026
16Indirect evidenceÅskollen, NorwayHQ checked Sep 16, 202651-2002 contacts →

Indirect evidence

“Helhetlig og lønnsom oppgradering av eksisterende bygg.”

Source: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceSkjetten, NorwayHQ checked Sep 16, 20261-102 contacts →

Indirect evidence

“Riecon er et konsulentfirma som arbeider for å redusere bedriftens energikostnader, samt å levere komplette tjenester som vil gjøre arbeidet med energi og miljø betydelig enklere.”

Source: RevenueBase Database · checked Sep 16, 2026
18Indirect evidenceTrondheim, NorwayHQ checked Sep 16, 20261-102 contacts →

Indirect evidence

“Pens AS er et ingeniørfirma som gir råd om miljøriktig og økonomisk bruk av energi for eiendom, industri og infrastruktur.”

Source: RevenueBase Database · checked Sep 16, 2026
19Indirect evidenceÅlesund, NorwayHQ checked Sep 16, 20261-101 contacts →

Indirect evidence

“Postvegen 11 ønsker å sette en ny standard for næringsbygg på Nordvestlandet.”

Source: RevenueBase Database · checked Sep 16, 2026
20Indirect evidenceKristiansand, NorwayHQ checked Sep 16, 20261-101 contacts →

Indirect evidence

“Vi leverer tjenester og produkter til energitiltak og bærekraftige energiløsninger.”

Source: RevenueBase Database · checked Sep 16, 2026
21Indirect evidenceStavanger, NorwayHQ checked Sep 16, 20261-101 contacts →

Indirect evidence

“we contribute to the reduction of greenhouse gas emissions through implementing our energy-efficiency platform to safeguard the environment, while at the same time maximize our…”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 21 of 37 commercial building decarbonization firms based in Norway

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Commercial building decarbonization firms based in Norway at a glance

As of Sep 16, 2026
38.1%Verified-email coverage
43.4Average contacts per company
1-10Median size (employees)
35.1%Largest-city concentration · Oslo
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
24
11-50
7
51-200
4
501-1,000
1
1,001-5,000
1

Email recency for this list is measured worldwide rather than for Norway, so it is reported there. Company counts and contact totals on this page are exact for Norway, over 37 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among commercial building decarbonization firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Norway whose own description of what they do matches “commercial building decarbonization firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names commercial building decarbonization firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among commercial building decarbonization firms, and records with no verified work email. Companies headquartered outside Norway are excluded even when they keep an office there.
Match quality
In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every listed company carries at least one verified work email, 613 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections
Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names commercial building decarbonization firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many commercial building decarbonization firms are there based in Norway?

RevenueBase identified 37 commercial building decarbonization firms headquartered in Norway as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

GK, headquartered in Oslo, tops this list with the largest team on record.

Which city has the most commercial building decarbonization firms?

Oslo leads with 13 headquartered companies, followed by Trondheim (4) and Alesund (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 613 verified decision-maker contacts tracked across these 37 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.