Open tenders · Ontario

Open Ontario government construction tenders

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

Updated June 6, 2026.

Open now

555

New in last 30 days

510

Showing

soonest 60

Closing soonest

Showing the 60 soonest-closing of 555 open tenders. Start free to see them all, scored to your profile →

Browse Ontario tenders by trade

Mechanical (HVAC & plumbing)25Electrical25General contracting18Bridge & structural15Underground utilities13Paving & asphalt12

Browse Ontario tenders by city

Toronto147Ottawa77Burlington16Hamilton11

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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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.