Open tenders · Ontario

Open Ontario government construction tenders

597 open public construction tenders in Ontario right now, scanned daily from MERX, CanadaBuys, and municipal portals like the City of Toronto.

Updated August 18, 2026.

Open now

597

New in last 30 days

518

Showing

soonest 60

Closing soonest

Showing the 60 soonest-closing of 597 open tenders. Start free to see them all, scored to your profile →

Browse Ontario tenders by trade

Electrical44Mechanical (HVAC & plumbing)37Underground utilities14Paving & asphalt12Concrete12General contracting12Demolition & site clearing11Roofing11Civil & earthworks10Landscaping & grounds10

Browse Ontario tenders by city

Toronto162Ottawa71Hamilton19Burlington12

These are the public listings.

Start free to see every open Ontario tender scored to your trade, geography, and bonding capacity — and to draft a compliance-aware bid proposal in minutes.

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Frequently asked questions

How often is this list of Ontario tenders updated?
Cornerstone scans Ontario's public procurement sources every day, and this page refreshes hourly — so the list reflects what's open right now. The "updated" date shows the most recent refresh.
Is it free to browse Ontario government tenders here?
Yes. Browsing open tenders is free and needs no account. A free Cornerstone account adds matching to your trade, geography, and bonding capacity, plus AI-drafted bid proposals — but the listings themselves are public.
Where do these Ontario tenders come from?
Public procurement portals — MERX, CanadaBuys, and municipal portals like the City of Toronto — plus municipal sites. Each listing links to the official source posting, where you submit your bid directly.

Listings aggregated from public procurement portals; each links to its official source. This page is general information, not procurement advice — always confirm requirements in the official tender documents.