Company lists · Data refreshed September 2026

Top 25 Retrofit contractors based in the Netherlands

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 433 companies tracked

RevenueBase identified 433 company matches for retrofit contractors associated with the Netherlands as of September 2026 and tracks 3,647 professional contacts across them, including 1,436 with verified work emails. Apeldoorn is the largest hub.

This list covers company matches for retrofit contractors associated with the Netherlands, 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

433Companies

3,647Contacts tracked

1,436Verified emails

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The 25 largest retrofit contractors based in the Netherlands

Ranked by team size

Top 25 of 433 company matches for retrofit contractors based in the Netherlands, 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	Feenstra	Exact match	Lelystad, NetherlandsHQ recorded Sep 17, 2026	1,001-5,000	781 contacts →
	Exact match “Sinds het ontstaan in 1947 is Feenstra marktleider in installatietechniek met een nationale dekking.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Saman Groep	Exact match	Zierikzee, NetherlandsHQ recorded Sep 17, 2026	201-500	211 contacts →
	Exact match “De energietransitie is één van de grootste maatschappelijke opgaven, maar wij begrijpen dat jouw wooncomfort net zo belangrijk is.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Takkenkamp Vastgoed Verduurzamers	Exact match	Apeldoorn, NetherlandsHQ recorded Sep 17, 2026	501-1,000	96 contacts →
	Exact match “Takkenkamp Vastgoed Verduurzamers kent een voorgeschiedenis van meer dan 85 jaar.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Rendon Onderhoudsgroep Onderhoud & Renovatie	Exact match	Voorburg · Werkendam · Haarlem · Eindhoven, NetherlandsHQ recorded Sep 17, 2026	51-200	71 contacts →
	Exact match “Jij geniet.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	VAN Hout Adviseurs EN Installateurs	Exact match	Veldhoven, NetherlandsHQ recorded Sep 17, 2026	51-200	63 contacts →
	Exact match “Van Hout loopt voorop op het gebied van werktuigbouwkundige installatietechniek en duurzame energie.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Peters Installatietechniek	Exact match	Zevenaar, NetherlandsHQ recorded Sep 17, 2026	51-200	54 contacts →
	Exact match “Dé specialist voor advies, plaatsing en onderhoud van duurzame, innovatieve en prefab klimaatinstallaties.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Breman Zuid	Exact match	Drunen, NetherlandsHQ recorded Sep 17, 2026	51-200	45 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	LEK Habo	Exact match	Bodegraven, NetherlandsHQ recorded Sep 17, 2026	51-200	44 contacts →
	Exact match “Lek/Habo is specialized in the engineering, installation and maintenance of sustainable energy installations.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	isolatiespecialist.nl	Exact match	Moerkapelle, NetherlandsHQ recorded Sep 17, 2026	51-200	43 contacts →
	Exact match “Isolatiespecialist.nl is een vertrouwde partner voor vele aannemers en woningcorporaties, betrokken bij het isoleren van zowel woningen als bedrijfspanden.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Takkenkamp Groep	Exact match	Apeldoorn, NetherlandsHQ recorded Sep 17, 2026	501-1,000	43 contacts →
	Exact match “Takkenkamp Groep is een leidend specialist in isolatie, restauratie, gevelonderhoud, steigerbouw, kunststof kozijnen en isolatieglas.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Thermosolutions BV	Exact match	Enschede, NetherlandsHQ recorded Sep 17, 2026	51-200	43 contacts →
	Exact match “With ThermoSolutions, you will be kept warm.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	isolatie.com	Exact match	Handel, NetherlandsHQ recorded Sep 17, 2026	51-200	42 contacts →
	Exact match “Isolatie.com is een snel groeiend, modern en servicegericht bedrijf waar we jouw binnenklimaat naar een hoger niveau tillen!” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	VAN Lochem Nederland Totaalonderhoud	Exact match	The Hague, NetherlandsHQ recorded Sep 17, 2026	201-500	41 contacts →
	Exact match “Van Lochem Nederland is een familiebedrijf opgericht in 1969 en specialist in Planmatig Onderhoud, Renovatie, Transformatie én Verduurzaming van vastgoed.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	NEW Energy Systems	Exact match	Schimmert, NetherlandsHQ recorded Sep 17, 2026	51-200	40 contacts →
	Exact match “New Energy Systems adviseert, ontwerpt, levert en installeert systemen voor de opwekking en het gebruik van duurzame energie in woon- en werkomgevingen.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Klimaatgarant	Exact match	Schiedam, NetherlandsHQ recorded Sep 17, 2026	51-200	40 contacts →
	Exact match “25 jaar gegarandeerd energieneutraal Klimaatgarant zorgt voor de best mogelijke energieprestatie van woningen.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Emondt Multiclima L Emondt Koeltechniek	Exact match	Enschede, NetherlandsHQ recorded Sep 17, 2026	51-200	36 contacts →
	Exact match “Emondt Multiclima l Emondt Koeltechniek In nauwe samenwerking met onze klanten ontwerpen, leveren en installeren wij landelijk duurzame en energiezuinige koel- en klimaatprojecten.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Bouwmeester Aannemersbedrijf	Exact match	The Hague, NetherlandsHQ recorded Sep 17, 2026	51-200	35 contacts →
	Exact match “Bouwmeester Aannemersbedrijf; sterk in totaalonderhoud door onze veelzijdigheid aan medewerkers.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Locas Installatietechniek	Exact match	Haarlem, NetherlandsHQ recorded Sep 17, 2026	51-200	33 contacts →
	Exact match “Als duurzame totaalinstallateur staan wij bekend om onze expertise in het ontwerpen, installeren en onderhouden van energie-efficiënte systemen.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Hartman Installatie	Exact match	Urk, NetherlandsHQ recorded Sep 17, 2026	51-200	32 contacts →
	Exact match “Bij Hartman Installatie in Urk, Hardenberg en Zwolle werken we elke dag aan duurzaam comfort.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	dle.energy	Exact match	Amsterdam, NetherlandsHQ recorded Sep 17, 2026	11-50	25 contacts →
	Exact match “DLE biedt vastgoedbeheerders, investeerders en eigenaren van commercieel vastgoed een totaaloplossing om de energieprestaties van hun panden te optimaliseren.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	DE Nieuwe Norm	Exact match	Rotterdam, NetherlandsHQ recorded Sep 17, 2026	11-50	25 contacts →
	Exact match “Elk gebouw raakt vroeg of laat uit vorm.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Kingspan Insulated Panels Netherlands	Exact match	Tiel, NetherlandsHQ recorded Sep 17, 2026	n/a	24 contacts →
	Exact match “At Kingspan, we're on a mission to transform the built environment through inspiration, innovation and insight.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Wibro Isolatie EN Renovatie B.V	Exact match	Heerle, NetherlandsHQ recorded Sep 17, 2026	11-50	24 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Unica Energy Solutions	Exact match	Hoevelaken, NetherlandsHQ recorded Sep 17, 2026	51-200	23 contacts →
	Exact match “Unica Energy Solutions maakt de energietransitie waar!” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	VAN DEN Hoff Installatiebedrijf BV	Exact match	Eindhoven, NetherlandsHQ recorded Sep 17, 2026	11-50	21 contacts →
	Exact match “VAN DEN HOFF Installatiebedrijf is al bijna 85 jaar vakkundig en energiek aan de slag in de installatiebranche in de regio Eindhoven.” 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 433 retrofit contractors based in the Netherlands

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Retrofit contractors based in the Netherlands at a glance

As of Sep 17, 2026

39.4%Verified-email coverage

8.4Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · Apeldoorn

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

233

11-50

149

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Netherlands, so it is reported there. Company counts and contact totals on this page are exact for Netherlands, over 433 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 the Netherlands 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 1,436 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 the Netherlands?

RevenueBase identified 433 company matches for retrofit contractors associated with the Netherlands 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?

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

Which city has the most retrofit contractors?

Apeldoorn leads with 8 company records, followed by Utrecht (8) and The Hague (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 1,436 professional contacts with verified work emails tracked across these 433 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.