Company lists · Data refreshed November 2026

Top 22 Electromechanical contractors based in London, Canada

Name: Electromechanical contractors based in London, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 37 companies tracked

RevenueBase identified 37 company matches for electromechanical contractors associated with London, Canada as of November 2026 and tracks 269 professional contacts across them, including 110 with verified work emails. Across Canada, Calgary is the largest hub for this category (239 companies); London has 37.

This list covers company matches for electromechanical contractors associated with London, Canada, 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 November 6, 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 Nov 6, 2026 How this list was built

37Companies

269Contacts tracked

110Verified emails

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The 22 largest electromechanical contractors based in London, Canada

Ranked by team size

Top 22 of 37 company matches for electromechanical contractors based in London, Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Drennan Refrigeration INC	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	51-200	44 contacts →
	Exact match “Drennan Refrigeration is an industrial refrigeration contractor specializing in the design, construction, and service of all types of refrigeration systems.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Vanderwesten & Rutherford Associates INC	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	34 contacts →
	Exact match “Vanderwesten & Rutherford is a consulting mechanical and electrical engineering firm with 49+ years of experience.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Bronnenco Construction LTD	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	17 contacts →
	Exact match “CONCEPTUALIZING YOUR DREAMS AND BUILDING YOUR REALITY A leading construction management and general contracting firm located in London, Ontario that completes small, medium and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Dielco Electric LTD	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	51-200	15 contacts →
	Exact match “Electrical Contractor focusing on industrial, municipal, and institutional projects in southwestern Ontario.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Brisson & Massie Mechanical	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	51-200	14 contacts →
	Exact match “Brisson & Massie is a mechanical company specializing in plumbing, heating, and air conditioning, in the multi-unit residential and commercial sectors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Integrated Engineering	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	13 contacts →
	Exact match “Integrated Engineering has been providing MECHANICAL & ELECTRICAL ENGINEERING SERVICES for industrial, commercial, recreational, multi-family residential and institutional…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Dielco Industrial Contractors LTD	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	10 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Tonda Construction Limited	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	10 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	AIR Design Services	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	9 contacts →
	Exact match “Air Design Services is a full service residential and commercial refrigeration, heating, air conditioning and indoor air quality contractor.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Angton Electric	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	9 contacts →
	Exact match “Angton has served the electrical needs of London and surrounding area for over 25 years, offering professional electrical installation and repairs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Barrett Mechanical	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	7 contacts →
	Exact match “Barrett Mechanical company” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Gencare Services Limited	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	6 contacts →
	Exact match “Repair, Maintenance, Servicing, Sales, Rentals of Emergency Stationary Generators of All Sizes.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	R. A. Barnes Electrical Contractors LTD	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	5 contacts →
	Exact match “Established in 1980's, at Barnes Electric we believe in building long term partnerships with our clients, suppliers, and staff.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	SCT Mechanical INC	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	4 contacts →
	Exact match “SCT Mechanical is a full service mechanical contractor dedicated to delivering the highest quality workmanship and client satisfaction in the industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	PTN Electrical Solutions Limited	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	4 contacts →
	Exact match “PTN Electrical is a licensed and insured electrical contractor.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Whitty Stallaert Engineering	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	4 contacts →
	Exact match “Whitty Stallaert Engineering (WSE) is a dynamic engineering consulting firm deeply rooted in Southwestern Ontario's building construction landscape.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	M&m Electric Services INC	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	3 contacts →
	Exact match “Our electrical experts are dedicated to complete your project (large or small) with quality, timeliness, and budgetary diligence.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	DLS Electric Inc. London	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	3 contacts →
	Exact match “RESIDENTIAL We are here to help you accomplish all of your electrical needs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	AL Gordon Electric Limited	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	2 contacts →
	Exact match “Gordon Electric is a general electrical contractor located in London, Ontario, Canada and has been serving Southwestern Ontario since 1975.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Jilani And Asuncion Consulting Engineers	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Waring Electric LTD	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	1-10	2 contacts →
	Exact match “Electrical Contractor” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Ferguson Electric LTD	Exact match	London, ON, CanadaHQ recorded Nov 6, 2026	11-50	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 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 “electromechanical 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 22 of 37 electromechanical contractors based in London, Canada

See the full list, filter by size, metro and specialty, and access 110 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Electromechanical contractors based in London, Canada at a glance

As of Nov 6, 2026

40.9%Verified-email coverage

7.3Average contacts per company

1-10Median size (employees)

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole Canada list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 37 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 London, Canada whose business descriptions match “electromechanical 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 110 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 November 6, 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.

Electromechanical contractors by metro in Canada

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 “electromechanical contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many electromechanical contractors are there based in London, Canada?

RevenueBase identified 37 company matches for electromechanical contractors associated with London, Canada as of November 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?

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

Which city in Canada has the most electromechanical contractors?

Calgary leads Canada with 239 company records, followed by Edmonton (167) and Toronto (163). London has 37.

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 110 professional contacts with verified work emails tracked across these 37 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 November 6, 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.