Company lists · Data refreshed September 2026

Top 25 Retrofit contractors based in Finland

Name: Retrofit contractors based in Finland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 58 companies tracked

RevenueBase identified 58 company matches for retrofit contractors associated with Finland as of September 2026 and tracks 329 professional contacts across them, including 176 with verified work emails. Helsinki is the largest hub.

This list covers company matches for retrofit contractors associated with Finland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

58Companies

329Contacts tracked

176Verified emails

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The 25 largest retrofit contractors based in Finland

Ranked by team size

Top 25 of 58 company matches for retrofit contractors based in Finland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	CERVI	Exact match	Helsinki, FinlandHQ recorded Sep 17, 2026	201-500	42 contacts →
	Exact match “Cervi on energiatehokkaaseen ilmanvaihtoon ja jäähdytyksen/ lämmitykseen keskittynyt erikoisasiantuntijaorganisaatio.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	ENERZ	Exact match	Espoo, FinlandHQ recorded Sep 17, 2026	51-200	41 contacts →
	Exact match “Our service Modern technical building solutions improve the cost and energy efficiency of new and renovated buildings.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Lemkem	Exact match	Lahti, FinlandHQ recorded Sep 17, 2026	51-200	25 contacts →
	Exact match “Lemkem is the leading turnkey sustainable energy solutions provider in Finland.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Insinööritoimisto Aavat OY	Exact match	Espoo, FinlandHQ recorded Sep 17, 2026	11-50	20 contacts →
	Exact match “Suunnittelemme kestävät ratkaisut asuin- ja toimitilakiinteistöjen muutos- ja korjaushankkeisiin.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Restok OY	Exact match	Helsinki, FinlandHQ recorded Sep 17, 2026	11-50	18 contacts →
	Exact match “Haluamme olla kiinteistöammattilaisten paras ja halutuin korjausrakentamisen kumppani.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Rakennustoimisto Laamo OY	Exact match	Raisio, FinlandHQ recorded Sep 17, 2026	51-200	12 contacts →
	Exact match “Palkittu saneeraaja ja uudisrakentaja vuosikymmenten kokemuksella.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Insinööritoimisto Teknoplan OY	Exact match	Helsinki, FinlandHQ recorded Sep 17, 2026	11-50	10 contacts →
	Exact match “Insinööritoimisto TeknoPlan Oy is the residents friendly pipe renovations consulting company in the capital area of finland.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Renea OY	Exact match	Vantaa, FinlandHQ recorded Sep 17, 2026	1-10	10 contacts →
	Exact match “Renea on kiinteistöjen energiatehokkuuden parantamiseen ja rakennusautomaatioon erikoistunut asiantuntijayritys.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Planius	Exact match	Helsinki, FinlandHQ recorded Sep 17, 2026	11-50	9 contacts →
	Exact match “Autamme tekemään järkevimmät energiaremontit, niin että kiinteistön kustannukset pysyvät kurissa ja energialuokka saadaan vähintään vaadittuun D-luokkaan.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Energiaykkönen OY	Exact match	Jyväskylä, FinlandHQ recorded Sep 17, 2026	11-50	9 contacts →
	Exact match “EnergiaYkkönen on kotitalouksien energia- ja putkiremontteihin keskittyvä yritys.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Innoair OY	Exact match	Vantaa, FinlandHQ recorded Sep 17, 2026	11-50	9 contacts →
	Exact match “Innoair Oy myy, suunnittelee ja asentaa energiatehokkaat ilmastointi, ilmanvaihto- ja lämmitysratkaisut kuluttajille, teollisuuteen ja yrityksille.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Redan OY	Exact match	Helsinki, FinlandHQ recorded Sep 17, 2026	11-50	8 contacts →
	Exact match “Redan Oy is a company based out of Helsinki, Uusimaa, Finland.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Rakennusvire OY	Exact match	Espoo, FinlandHQ recorded Sep 17, 2026	11-50	7 contacts →
	Exact match “Olemme pääkaupunkiseudulla toimiva julkisivukorjausten erikoisosaaja 30 vuoden kokemuksella.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Suomen Energiainsinöörit OY	Exact match	Helsinki, FinlandHQ recorded Sep 17, 2026	1-10	4 contacts →
	Exact match “Energiatehokkuuden parantaminen Useimmissa rakennuksissa voidaan energiatehokkuutta parantaa edullisilla teknisillä ratkaisuilla.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Pistoke OY	Exact match	Vantaa, FinlandHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match “Pistoke Oy auttaa suomalaisia kiinteistönomistajia ja rakennuttajia pienentämään rakennusten hiilidioksidipäästöjä ja saavuttamaan korkean lämmityksen energiaomavaraisuuden.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Wahlres	Exact match	Vantaa, FinlandHQ recorded Sep 17, 2026	1-10	3 contacts →
	Exact match “Wahlres Oy was founded in 2016 and aims to reduce the reliance of Finnish buildings on non-renewable energy sources.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Rakenne Center	Exact match	Tampere, FinlandHQ recorded Sep 17, 2026	11-50	2 contacts →
	Exact match “Rakenne Center on yrittäjävetoinen rakennusalan yritys, joka tarjoaa nykyaikaiset ja kustannustehokkaat ratkaisut kotisi rakenteellisen turvallisuuden ja hyvinvoinnin takaamiseksi.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Lämpöjokeri OY	Exact match	Lahti, FinlandHQ recorded Sep 17, 2026	11-50	2 contacts →
	Exact match “Vihreä siirtymä, uusiutuva energia, hiilineutraali tulevaisuus?” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	UVL Talotekniikka OY	Exact match	Järvenpää, FinlandHQ recorded Sep 17, 2026	11-50	2 contacts →
	Exact match “UVL Talotekniikka on pääkaupunkiseudulla toimiva talotekniikka-alan urakointiyritys.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Energion	Exact match	Jyväskylä, FinlandHQ recorded Sep 17, 2026	51-200	1 contacts →
	Exact match “Olemme kiinteistöjen energiaremontointiin ja energiatehokkuuden optimointiin erikoistunut yritys.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Kumpulan Sähkö OY	Exact match	Helsinki, FinlandHQ recorded Sep 17, 2026	11-50	1 contacts →
	Exact match “Kumpulan Sähkö on saneeraukseen erikoistunut sähköurakoitsija ja kumppani.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Kalevan Sähkö	Exact match	Tampere, FinlandHQ recorded Sep 17, 2026	11-50	1 contacts →
	Exact match “Kalevan Sähkö toimittaa sähkötyöt kokonaisvaltaisena ratkaisuna niin uudisrakennuksiin kuin saneerauskohteisiin.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Enerwise OY	Exact match	Mikkeli, FinlandHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Energiaratkaisujen asiantuntija.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Electroz OY	Exact match	Vantaa, FinlandHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match “Electroz Oy on alkujaan suunnannut voimakkaasti uudiskohteiden sähköistämiseen.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Timpro OY	Exact match	Lieto, FinlandHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “retrofit contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 58 retrofit contractors based in Finland

See the full list, filter by size, metro and specialty, and access 176 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Retrofit contractors based in Finland at a glance

As of Sep 17, 2026

53.5%Verified-email coverage

5.7Average contacts per company

11-50Median size (employees)

29.3%Largest-city concentration · Helsinki

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured worldwide rather than for Finland, so it is reported there. Company counts and contact totals on this page are exact for Finland, over 58 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Finland whose business descriptions match “retrofit contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 176 professional contacts with verified work emails across the full matched dataset. 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 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “retrofit contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many retrofit contractors are there based in Finland?

RevenueBase identified 58 company matches for retrofit contractors associated with Finland as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

CERVI tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most retrofit contractors?

Helsinki leads with 17 company records, followed by Vantaa (9) and Espoo (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 176 professional contacts with verified work emails tracked across these 58 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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 SmartSearch, 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.