Open tenders · Ontario

Open Ontario government construction tenders

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

Updated September 4, 2026.

Open now

692

New in last 30 days

599

Showing

soonest 60

Closing soonest

Showing the 60 soonest-closing of 692 open tenders. Start free to see them all, scored to your profile →

Browse Ontario tenders by trade

Electrical33Mechanical (HVAC & plumbing)26Snow removal14Demolition & site clearing13Storm sewer12Concrete11General contracting11Sanitary sewer11Paving & asphalt10

Browse Ontario tenders by city

Toronto186Ottawa84Hamilton12

These are the public listings.

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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.