Company lists · Data refreshed September 2026

Top 24 Retrofit contractors based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 94 companies tracked

RevenueBase identified 94 company matches for retrofit contractors associated with Ireland as of September 2026 and tracks 53,515 professional contacts across them, including 7,160 with verified work emails. Dublin is the largest hub.

This list covers company matches for retrofit contractors associated with Ireland, 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

94Companies

53,515Contacts tracked

7,160Verified emails

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The 24 largest retrofit contractors based in Ireland

Ranked by team size

Top 24 of 94 company matches for retrofit contractors based in Ireland, 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	Johnson Controls	Exact match	Cork, IrelandHQ recorded Sep 17, 2026	10001+	52,736 contacts →
	Exact match “Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	SE Systems	Exact match	Cork, IrelandHQ recorded Sep 17, 2026	51-200	59 contacts →
	Exact match “SE Systems (Sustainable Energy Systems) is Ireland's leading energy solutions provider.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Lynskey Engineering LTD	Exact match	Dublin 10, IrelandHQ recorded Sep 17, 2026	51-200	47 contacts →
	Exact match “Lynskey Engineering Limited provide a wide scope of Mechanical Building Services covering commercial, industrial, process and mixed use developments.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Energystore	Exact match	Holywood, IrelandHQ recorded Sep 17, 2026	51-200	44 contacts →
	Exact match “Energystore is rethinking construction with free-flowing insulation.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Electric Ireland Superhomes	Exact match	Thurles, IrelandHQ recorded Sep 17, 2026	11-50	43 contacts →
	Exact match “Electric Ireland Superhomes is a One Stop Shop which looks after all the key stages of a home energy retrofit, from retrofit design through to project completion and management of…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Ashgrove Renewables	Exact match	Cork, IrelandHQ recorded Sep 17, 2026	51-200	33 contacts →
	Exact match “We take great pride in our data-driven, scientific approach to energy solutions, spearheaded by a team known for its experience and creative design skills.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Verde Energy Group	Exact match	Little Island, IrelandHQ recorded Sep 17, 2026	11-50	31 contacts →
	Exact match “Verde Energy Group Delivering energy cost savings and carbon reduction solutions to Commercial & Industrial businesses since 2009.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Alfa Electrical LTD	Exact match	Dublin 12, IrelandHQ recorded Sep 17, 2026	51-200	25 contacts →
	Exact match “Alfa Electrical is one of Ireland's leading electrical engineering contractors, delivering high-quality commercial, industrial, residential and retail projects nationwide.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	House 2 Home Retrofit LTD	Exact match	Dublin 12, IrelandHQ recorded Sep 17, 2026	11-50	20 contacts →
	Exact match “House 2 Home has been Ireland's leading 'one stop shop' for energy upgrades since 2013.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Energlaze Home Energy Upgrades	Exact match	Wexford, IrelandHQ recorded Sep 17, 2026	11-50	17 contacts →
	Exact match “At Energlaze Home Energy Upgrades, not only are we committed to improving the overall comfort of your home, but we are also focused on reducing your energy costs and can help you…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Symphony Energy	Exact match	Wicklow, IrelandHQ recorded Sep 17, 2026	11-50	17 contacts →
	Exact match “Symphony Energy is a global leader in optimising energy performance in the commercial built environment.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	RGN Electrical & Communications LTD	Exact match	Osberstown, IrelandHQ recorded Sep 17, 2026	11-50	16 contacts →
	Exact match “RGN Specialises in retro-fit School, Commerical, and industrial fit outs” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Frontline Energy	Exact match	Dublin 4, IrelandHQ recorded Sep 17, 2026	11-50	15 contacts →
	Exact match “We are energy innovators and pride ourselves in delivering an end to end range of expertise for the built environment that saves energy, carbon, time and cost.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Breffni Insulation	Exact match	Kilnaleck, IrelandHQ recorded Sep 17, 2026	11-50	14 contacts →
	Exact match “Breffni Insulation was founded in 2006 and the company is registered and compliant with standards as per the National Standards Authority of Ireland (NSAI), Sustainable Energy…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	NRG Panel	Exact match	Castleblayney, IrelandHQ recorded Sep 17, 2026	51-200	14 contacts →
	Exact match “NRG Panel are one of Ireland's leading installers of solar panels and air to water heat pumps.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	ENCON	Exact match	Waterford, IrelandHQ recorded Sep 17, 2026	11-50	14 contacts →
	Exact match “Encon is a sustainable building, retrofit, and renewables company committed to transforming how Ireland builds, renovates, and powers its spaces.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Cooper Insulation LTD	Exact match	Kells, IrelandHQ recorded Sep 17, 2026	11-50	12 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Blackwell Energy	Exact match	Dublin 6, IrelandHQ recorded Sep 17, 2026	51-200	9 contacts →
	Exact match “Blackwell Energy design, supply & install home and business energy services such as solar PV, air source heat pumps, retrofit underfloor heating, air conditioning, deep retrofit…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Envirobead LTD	Exact match	Cork, IrelandHQ recorded Sep 17, 2026	11-50	9 contacts →
	Exact match “Your #OneStopShop SEAI approved specialists with complete home energy upgrade solutions.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Integrate Home Energy Upgrades	Exact match	Newtownmountkennedy, IrelandHQ recorded Sep 17, 2026	1-10	8 contacts →
	Exact match “Integrate Home Energy Upgrades is a One-Stop-Shop retrofit service provider based in Wicklow town.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Ecohouse Developments Limited	Exact match	Dublin, IrelandHQ recorded Sep 17, 2026	51-200	8 contacts →
	Exact match “We are a tight knit in‐house team of designers, architects and builders, committed to creating beautiful, energy efficient homes and buildings, working towards a passive standard.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	ECO Energy Improvements	Exact match	Dundalk, IrelandHQ recorded Sep 17, 2026	11-50	7 contacts →
	Exact match “Eco Energy Improvements are leading specialists in renewable energy retrofitting solutions with over 20 years of experience.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Vivid Edge	Exact match	Ucd Belfield Dublin 4, IrelandHQ recorded Sep 17, 2026	1-10	6 contacts →
	Exact match “At Vivid Edge, we're passionate about helping our customers save precious time and funds while cutting carbon.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Codex Energy Consultants LTD	Exact match	Ballycoolin, IrelandHQ recorded Sep 17, 2026	1-10	6 contacts →
	Exact match “Codex Energy Consultants Ltd is a company of specialist engineering and energy consultants.” 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 24 of 94 retrofit contractors based in Ireland

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Retrofit contractors based in Ireland at a glance

As of Sep 17, 2026

13.4%Verified-email coverage

569.3Average contacts per company

11-50Median size (employees)

16.0%Largest-city concentration · Dublin

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

10001+

Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 94 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 Ireland 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 7,160 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 Ireland?

RevenueBase identified 94 company matches for retrofit contractors associated with Ireland 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?

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

Which city has the most retrofit contractors?

Dublin leads with 15 company records, followed by Cork (3) and Waterford (3).

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 7,160 professional contacts with verified work emails tracked across these 94 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.