Open tenders · Ontario

Open Ontario government construction tenders

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

Updated October 21, 2026.

Open now

128

New in last 30 days

108

Showing

1–60

Closing soonest

Showing tenders 1–60 of 128 open, soonest closing first. Start free to see them scored to your profile →

Browse Ontario tenders by trade

Electrical22Mechanical (HVAC & plumbing)22Underground utilities12

Browse Ontario tenders by city

Toronto38Ottawa14

Open tenders in other provinces

AlbertaBritish ColumbiaSaskatchewanQuebecManitobaNew BrunswickNova Scotia

These are the public listings.

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Occasional notes on Canadian public construction tenders and what's new on Cornerstone. It isn't a tender alert: to get new Ontario tenders matched to your trade by email, start free above. No spam, unsubscribe anytime.

Bidding in Ontario

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.