Company lists · Data refreshed September 2026

Top 25 Historic preservation companies based in Canada

Name: Historic preservation companies based in Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 93 companies tracked

RevenueBase identified 93 company matches for historic preservation companies associated with Canada as of September 2026 and tracks 1,040 professional contacts across them, including 530 with verified work emails. Toronto is the largest hub.

This list covers company matches for historic preservation companies associated with 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 September 19, 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 19, 2026 How this list was built

93Companies

1,040Contacts tracked

530Verified emails

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The 25 largest historic preservation companies based in Canada

Ranked by team size

Top 25 of 93 company matches for historic preservation companies based in Canada, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	St-Denis Thompson	Exact match	Montreal, QC, CanadaHQ recorded Sep 19, 2026	201-500	118 contacts →
	Exact match “St-Denis Thompson est reconnue pour son expertise en restauration de bâtiments et en réfection de structures de maçonnerie de pierres et de brique ou de béton.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	ASI Providing Archaeological & Cultural Heritage Services	Exact match	Toronto, ON, CanadaHQ recorded Sep 19, 2026	51-200	110 contacts →
	Exact match “ASI is the largest archaeological and cultural heritage consulting firm in Ontario with over thirty years experience in the production and dissemination of knowledge concerning…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	ERA Architects INC	Exact match	Toronto, ON, CanadaHQ recorded Sep 19, 2026	51-200	103 contacts →
	Exact match “ERA Architects Inc.(ERA) is an award-winning architecture and planning firm focused on conservation through reactivation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Archaeological Research Associates LTD	Exact match	Hamilton, ON, CanadaHQ recorded Sep 19, 2026	51-200	67 contacts →
	Exact match “Archaeological Research Associates Ltd.(ARA) is Ontario’s oldest archaeological and heritage consulting firm, uncovering Ontario's history since 1972.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Tmhc INC	Exact match	London, ON, CanadaHQ recorded Sep 19, 2026	11-50	53 contacts →
	Exact match “TMHC embraces the respectful conservation of Ontario's cultural heritage, working in partnership with municipalities, public and private organizations, Indigenous and descendent…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	The Ventin Group Ltd. VG	Exact match	Brantford, ON, CanadaHQ recorded Sep 19, 2026	11-50	52 contacts →
	Exact match “The Ventin Group (+VG) is a full service architectural firm known for innovative approaches to the design of Heritage, Cultural, Educational, Municipal, Justice, Residential and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Heritage Grade	Exact match	Ottawa, CanadaHQ recorded Sep 19, 2026	51-200	31 contacts →
	Exact match “Heritage Grade is known throughout Ontario, Quebec and the World, as leaders in Architectural Restoration.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Heritage Restoration INC	Exact match	Stouffville, ON, CanadaHQ recorded Sep 19, 2026	201-500	26 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Circle CRM Group	Exact match	Calgary, AB, CanadaHQ recorded Sep 19, 2026	11-50	25 contacts →
	Exact match “Circle CRM Group Inc.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Nadeau Blondin Lortie Architectes	Exact match	La Prairie, QC, CanadaHQ recorded Sep 19, 2026	11-50	23 contacts →
	Exact match “Nadeau Blondin Lortie architectes, nouvelle dénomination de Nadeau Nadeau Blondin architecte, est un bureau québécois bénéficiant d'une expertise et d'une expérience notable en…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Mdtp Atelier D'architecture INC	Exact match	Beauharnois, QC, CanadaHQ recorded Sep 19, 2026	11-50	20 contacts →
	Exact match “Depuis 1988, mdtp atelier d’architecture ne cesse de participer à la revitalisation de la grande région montérégienne qui l’a vue naître en changeant le visage des secteurs…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	SMR Experts	Exact match	Châteauguay, QC, CanadaHQ recorded Sep 19, 2026	51-200	20 contacts →
	Exact match “SMR Experts is a leader in building restoration.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Roof Tile Management INC	Exact match	Mississauga, ON, CanadaHQ recorded Sep 19, 2026	51-200	20 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	KWC Architects INC	Exact match	Ottawa, ON, CanadaHQ recorded Sep 19, 2026	11-50	17 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Cosigma	Exact match	Montreal, QC, CanadaHQ recorded Sep 19, 2026	11-50	16 contacts →
	Exact match “Firme spécialisée en préservation et réhabilitation des structures” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Taylor Hazell Architects	Exact match	Toronto, ON, CanadaHQ recorded Sep 19, 2026	11-50	16 contacts →
	Exact match “Taylor Hazell Architects is an award-winning architecture practice located in the King-Spadina area of downtown Toronto.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	GBCA	Exact match	Toronto, ON, CanadaHQ recorded Sep 19, 2026	11-50	15 contacts →
	Exact match “Founded in 2001, GBCA (Goldsmith Borgal & Company Ltd.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Riopel Associés Architectes	Exact match	Montréal, QC, CanadaHQ recorded Sep 19, 2026	11-50	12 contacts →
	Exact match “Fondée en 1978, la firme Riopel + associés architectes regroupe aujourd’hui vingt-cinq (25) personnes ressources permanentes dont quatre associés.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Provive Group	Exact match	Mississauga, ON, CanadaHQ recorded Sep 19, 2026	11-50	11 contacts →
	Exact match “Provive restores commercial assets to shine like new, at 50%- 95% off the cost of replacement.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Gestion Georges Coulombe INC	Exact match	Montréal, QC, CanadaHQ recorded Sep 19, 2026	11-50	10 contacts →
	Exact match “Depuis sa création en 1982, Gestion Georges Coulombe se donne pour objectif d’échafauder les projets de restauration d’immeubles patrimoniaux parmi les plus ambitieux de la région…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	K.I.B. Building Restoration INC	Exact match	Mississauga, ON, CanadaHQ recorded Sep 19, 2026	11-50	10 contacts →
	Exact match “A leader in building restoration across Southern Ontario, since Empowered by over twenty-five years of experience, we deliver quality results, on time and on budget.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Macdero Construction Ontario LTD	Exact match	Toronto, CanadaHQ recorded Sep 19, 2026	51-200	10 contacts →
	Exact match “Macdero Construction (Ontario) Ltd, founded in 1985, set out with a clear mission: to provide professional, client-centred building and structural restoration services in a…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Lari Construction	Exact match	Gatineau, QC, CanadaHQ recorded Sep 19, 2026	51-200	10 contacts →
	Exact match “Lari Construction is a construction firm that specializes in stone restoration, masonry, work and also operates as general contractor.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Boldera Architecture	Exact match	Toronto, ON, CanadaHQ recorded Sep 19, 2026	1-10	9 contacts →
	Exact match “Boldera is a Toronto-based architecture and heritage consulting practice specializing in heritage conservation, adaptive reuse, and context-driven architecture.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Historic Restoration INC	Exact match	Toronto, ON, CanadaHQ recorded Sep 19, 2026	11-50	8 contacts →
	Exact match “Historic Restoration is a leading Toronto based restoration contractor.” Recorded in the RevenueBase company graph · Sep 19, 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 “historic preservation companies”. 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 93 historic preservation companies based in Canada

See the full list, filter by size, metro and specialty, and access 530 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Historic preservation companies based in Canada at a glance

As of Sep 19, 2026

51.0%Verified-email coverage

11.2Average contacts per company

11-50Median size (employees)

25.8%Largest-city concentration · Toronto

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Canada, so it is reported there. Company counts and contact totals on this page are exact for Canada, over 93 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 Canada whose business descriptions match “historic preservation companies” 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 530 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 19, 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 “historic preservation companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many historic preservation companies are there based in Canada?

RevenueBase identified 93 company matches for historic preservation companies associated with Canada 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?

St-Denis Thompson tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most historic preservation companies?

Toronto leads with 24 company records, followed by Montreal (11) and Ottawa (5).

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 530 professional contacts with verified work emails tracked across these 93 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 19, 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.