Company lists · Data refreshed September 2026

Top 25 Heritage architecture firms based in Toronto, Canada

Name: Heritage architecture firms based in Toronto, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 94 companies tracked

RevenueBase identified 94 heritage architecture firms headquartered in Toronto, Canada as of September 2026 and tracks 2,065 professional contacts across them, including 1,036 with verified work emails. Toronto is the largest hub.

This list covers heritage architecture firms headquartered in Toronto, Canada, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

94Companies

2,065Contacts tracked

1,036Verified emails

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The 25 largest heritage architecture firms based in Toronto, Canada

Ranked by team size

Top 25 of 94 heritage architecture firms based in Toronto, Canada, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to heritage architecture firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	NORR	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	501-1,000	907 contacts →
	Indirect evidence “NORR is a global team of 750 architects, engineers, planners, and interior designers creating design strategies and solutions that express the unique vision of every project.” Source: RevenueBase Database · checked Sep 16, 2026
2	Wzmh Architects	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	175 contacts →
	Partial evidence “We are an award-winning architectural partnership based in Toronto.” Source: RevenueBase Database · checked Sep 16, 2026
3	Core Architects	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	114 contacts →
	Indirect evidence “CORE Architects Inc.” Source: RevenueBase Database · checked Sep 16, 2026
4	ASI Providing Archaeological & Cultural Heritage Services	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	110 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
5	ERA Architects INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	103 contacts →
	Partial evidence “ERA Architects Inc.(ERA) is an award-winning architecture and planning firm focused on conservation through reactivation.” Source: RevenueBase Database · checked Sep 16, 2026
6	Sweeny &co Architects INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	52 contacts →
	Indirect evidence “Since our inception in 1988, Sweeny & Co Architects has focused on collaborating with owners, investors and tenants to achieve exceptional results.” Source: RevenueBase Database · checked Sep 16, 2026
7	Cs&p Architects INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	44 contacts →
	Partial evidence “CS & P Architects is one of Canada’s leading design practices, offering a full range of architectural, planning, interior and urban design services to a wide range of clients -…” Source: RevenueBase Database · checked Sep 16, 2026
8	Abbarch Architecture INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	51-200	37 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
9	Kohn Partnership Architects INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	32 contacts →
	Indirect evidence “Specializing in the Toronto market, Kohn Partnership Architects Inc.” Source: RevenueBase Database · checked Sep 16, 2026
10	Strasman Architects INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	26 contacts →
	Partial evidence “Strasman Architects Inc.(SAI) is a full-service Canadian architecture and interior design firm, recognized for our highly collaborative approach to award-winning design.” Source: RevenueBase Database · checked Sep 16, 2026
11	Menatwork	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	24 contacts →
	Indirect evidence “Since 1989, MENATWORK has specialized in integrated Design+Build services that renew and expand older homes in Toronto neighbourhoods.” Source: RevenueBase Database · checked Sep 16, 2026
12	Taylor Hazell Architects	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “Taylor Hazell Architects is an award-winning architecture practice located in the King-Spadina area of downtown Toronto.” Source: RevenueBase Database · checked Sep 16, 2026
13	GBCA	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “Founded in 2001, GBCA (Goldsmith Borgal & Company Ltd.” Source: RevenueBase Database · checked Sep 16, 2026
14	PMP Design Group	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “We are a team of professional architects and designers that have been actively designing residential and commercial projects in the market since 2008.” Source: RevenueBase Database · checked Sep 16, 2026
15	Makow Associates Architect INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	11 contacts →
	Partial evidence “Over the past thirty-seven years Makow Architects has developed a reputation for creating exceptional architecture and interior design.” Source: RevenueBase Database · checked Sep 16, 2026
16	Design Workshop Architects	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	10 contacts →
	Indirect evidence “Design that works.” Source: RevenueBase Database · checked Sep 16, 2026
17	Memar Architects INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	10 contacts →
	Indirect evidence “Memar Architects is a Toronto-based Architect firm, providing full-services for residential, commercial, institutional and industrial projects.” Source: RevenueBase Database · checked Sep 16, 2026
18	Dewson Architects INC	Partial evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	9 contacts →
	Partial evidence “Founded in 1996, Dewson Architects is an award-winning firm specializing in residential and commercial architecture – contemporary, historical, sustainable.” Source: RevenueBase Database · checked Sep 16, 2026
19	Boldera Architecture	Strong evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	9 contacts →
	Strong evidence “Boldera is a Toronto-based architecture and heritage consulting practice specializing in heritage conservation, adaptive reuse, and context-driven architecture.” Source: RevenueBase Database · checked Sep 16, 2026
20	Epic Designs INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	9 contacts →
	Indirect evidence “At Epic, we believe that the home is an extension of the self and that the relationship it shares with its surroundings, and you, should be reflected in its form, style, and…” Source: RevenueBase Database · checked Sep 16, 2026
21	Historic Restoration INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	11-50	8 contacts →
	Indirect evidence “Historic Restoration is a leading Toronto based restoration contractor.” Source: RevenueBase Database · checked Sep 16, 2026
22	Giaimo	Strong evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	8 contacts →
	Strong evidence “Giaimo is an architecture firm based in Toronto, integrating design and heritage conservation.” Source: RevenueBase Database · checked Sep 16, 2026
23	Fine Lines Design INC	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	7 contacts →
	Indirect evidence “From its conception, Fine Lines Designs has grown into a well-respected Canadian owned company with a diverse team of highly dedicated individuals committed to delivering high…” Source: RevenueBase Database · checked Sep 16, 2026
24	Larkin Architect Limited	Strong evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	7 contacts →
	Strong evidence “Established in 1981, Larkin Architect Limited is an award-winning, full service architectural practice with a broad portfolio encompassing project planning, heritage restorations…” Source: RevenueBase Database · checked Sep 16, 2026
25	Clifford Restoration	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 16, 2026	1-10	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: heritage architecture firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names heritage architecture firms.
Partial evidence: Its own public description names part of heritage architecture firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name heritage architecture firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 94 heritage architecture firms based in Toronto, Canada

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Heritage architecture firms based in Toronto, Canada at a glance

As of Sep 16, 2026

50.2%Verified-email coverage

22.0Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Toronto

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured across the whole Canada list rather than for Toronto, so it is reported there. Company counts and contact totals on this page are exact for Toronto, over 94 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among heritage architecture firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Toronto, Canada whose own description of what they do matches “heritage architecture firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names heritage architecture firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among heritage architecture firms, and records with no verified work email. Companies headquartered outside Toronto are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,036 across the full list. 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 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Heritage architecture firms by metro in Canada

Heritage architecture firms in Toronto94
Heritage architecture firms in Montreal52
Heritage architecture firms in Vancouver33

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names heritage architecture firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many heritage architecture firms are there based in Toronto, Canada?

RevenueBase identified 94 heritage architecture firms headquartered in Toronto, Canada as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

NORR, headquartered in Toronto, tops this list with the largest team on record.

Which city has the most heritage architecture firms?

Toronto leads with 94 headquartered companies, followed by Montreal (52) and Vancouver (33).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,036 verified decision-maker contacts tracked across these 94 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 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 Smart Search, 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.