Company lists · Data refreshed November 2026

Top 23 Office building contractors based in Ottawa, Canada

Name: Office building contractors based in Ottawa, Canada
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 121 companies tracked

RevenueBase identified 121 company matches for office building contractors associated with Ottawa, Canada as of November 2026 and tracks 1,090 professional contacts across them, including 390 with verified work emails. Across Canada, Toronto is the largest hub for this category (347 companies); Ottawa has 121.

This list covers company matches for office building contractors associated with Ottawa, 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

121Companies

1,090Contacts tracked

390Verified emails

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The 23 largest office building contractors based in Ottawa, Canada

Ranked by team size

Top 23 of 121 company matches for office building contractors based in Ottawa, 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	Alliance Engineering & Construction LTD	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	51-200	47 contacts →
	Exact match “Alliance offers Mechanical and Electrical Design and Construction services, providing integrated solutions across the industrial, commercial, institutional and high-rise…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Thomas Fuller Construction Co. Limited	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	51-200	42 contacts →
	Exact match “With its heritage analogous to the history of Canada itself, The Fuller Group is the largest and oldest established locally-owned construction and development organization in…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Mcdonald Brothers Construction INC	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	51-200	33 contacts →
	Exact match “McDonald Brothers Construction - established in 1988 - is a General Contractor based in the Ottawa area which services primarily the Industrial, Commercial, and Institutional…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Rojo Construction Management INC	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	31 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Doran Contractors Limited	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	31 contacts →
	Exact match “When time, money, and quality count, people choose Doran Contractors Limited for peace of mind.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Waterdon Construction LTD	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	51-200	27 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Fishburn Sheridan Group Of Companies	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	26 contacts →
	Exact match “Fishburn Sheridan & Associates is now part of MTE Consultants, the same team, now supported by a multidisciplinary firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Jbpa Developments INC	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	25 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Westview Projects INC	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	23 contacts →
	Exact match “Westview Projects is a full service General Contractor.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Premium Construction	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	21 contacts →
	Exact match “Since 2013, Premium Construction has offered services across all sectors (Industrial, Commercial, and institutional) providing General Contracting, Construction Management and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Bradford Construction Ltd.	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	17 contacts →
	Exact match “Since 1992 BRADFORD has been building for better health care in the National Capital region.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	ZW Management INC	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	17 contacts →
	Exact match “Founded in 1986, ZW Management Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Brawn Construction LTD	Exact match	Ottawa, CanadaHQ recorded Nov 6, 2026	11-50	16 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Cunliffe & Associates INC	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	14 contacts →
	Exact match “We’re a structural engineering firm with over 30 years of experience, providing a level of detail and quality renowned in the industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Dalcon Constructors LTD	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	1-10	14 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	The Lake Partnership INC	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	13 contacts →
	Exact match “Established in 1994, The Lake Partnership provides an integrated project management & general contracting service that delivers custom, high quality workmanship in an organized…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Torus Construction Corporation	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	1-10	11 contacts →
	Exact match “Torus Construction; Ottawa's Source for Municipal, Commercial & Residential Construction.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	FTC General Contractor	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	10 contacts →
	Exact match “FTC construction is one of the region's finest general contractors with over 49 years of experience and expertise with projects of all sizes.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Jumec Construction INC	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	9 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Prestige Design And Construction LTD	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	51-200	9 contacts →
	Exact match “Prestige Design & Construction is a fully integrated privately held construction company which was founded in Ottawa in 1981.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Graebeck Construction LTD	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	7 contacts →
	Exact match “Founded in Graebeck Construction Ltd.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	RND Construction LTD	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	7 contacts →
	Exact match “RND Construction and our partners excel at any kind of project.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Grandcor	Exact match	Ottawa, ON, CanadaHQ recorded Nov 6, 2026	11-50	6 contacts →
	Exact match “GrandCor is a multi-disciplinary construction company headquartered in Ottawa, with operations across the Canadian National Capital Region.” 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 “office building 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 23 of 121 office building contractors based in Ottawa, Canada

See the full list, filter by size, metro and specialty, and access 390 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Office building contractors based in Ottawa, Canada at a glance

As of Nov 6, 2026

35.8%Verified-email coverage

9.0Average contacts per company

11-50Median size (employees)

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

5,001-10,000

Email recency for this list is measured across the whole Canada list rather than for Ottawa, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 121 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 Ottawa, Canada whose business descriptions match “office building 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 390 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.

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

How many office building contractors are there based in Ottawa, Canada?

RevenueBase identified 121 company matches for office building contractors associated with Ottawa, 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?

Alliance Engineering & Construction LTD tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in Canada has the most office building contractors?

Toronto leads Canada with 347 company records, followed by Calgary (186) and Montreal (171). Ottawa has 121.

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 390 professional contacts with verified work emails tracked across these 121 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.