Open tenders · Ontario
Open Ontario government construction tenders
137 open public construction tenders in Ontario right now, scanned daily from MERX, CanadaBuys, and municipal portals like the City of Toronto.
Updated October 18, 2026.
Open now
137
New in last 30 days
110
Showing
61–120
Closing soonest
- Department of National Defence (DND)OntarioCloses Oct 26, 2026via MERXElectricalView on official portal →
- City of TorontoToronto, ONCloses Oct 26, 2026via City of TorontoWatermainView on official portal →
- Ontario Shared ServicesOntarioCloses Oct 26, 2026via MERXSnow RemovalView on official portal →
- City of TorontoOntarioCloses Oct 26, 2026via MERXWatermainView on official portal →
- City of TorontoOntarioCloses Oct 26, 2026via MERXBridgeView on official portal →
Electrical Tooling Student Kits
9 days leftSt Clair College of Applied Arts and TechnologyWindsor-Sarnia, ONCloses Oct 26, 2026via MERXElectricalView on official portal →Preventative & On-Demand Maintenance Services for HVAC Systems in the Town of New Tecumseth
10 days leftTown of New TecumsethAlliston, OntarioCloses Oct 27, 2026via BiddingoMechanicalView on official portal →(CP-598) Prime Electrical Contractor: Electrical Resiliency Upgrades, The Ottawa Hospital - General Campus
10 days leftMohawk MedbuyBurlington, OntarioCloses Oct 27, 2026via BiddingoElectricalView on official portal →- MetrolinxSouthern OntarioCloses Oct 27, 2026via MERXBridgeView on official portal →
Wharf Repairs
10 days leftDepartment of Fisheries and Oceans (DFO)OntarioCloses Oct 27, 2026via MERXMarineView on official portal →RFP 5832502135 — Parks, Forestry & Recreation
10 days leftCity of TorontoToronto, ONCloses Oct 27, 2026via City of TorontoLandscapingView on official portal →RFP 5540340341 — Toronto Water
10 days leftCity of TorontoToronto, ONCloses Oct 27, 2026via City of TorontoSanitaryView on official portal →- University of GuelphKitchener-Waterloo-Barrie, ONCloses Oct 27, 2026via MERXMechanicalInsulationView on official portal →
LTDLC Floors 6 and 7 Paint and Carpet Repair
10 days leftDepartment of Public Works and Government Services (PSPC)OntarioCloses Oct 27, 2026via MERXPaintingView on official portal →DND - Roof Replacement
10 days leftBGIS - RP4ON - 11 - Ottawa, ONCloses Oct 27, 2026via MERXRoofingView on official portal →- *Ontario (except NCR)Closes Oct 29, 2026via CanadaBuysBridgeView on official portal →
- MetrolinxSouthern OntarioCloses Oct 29, 2026via MERXMechanicalView on official portal →
- University of Toronto – OREPToronto, ONCloses Oct 29, 2026via MERXMechanicalView on official portal →
- BGIS - PWGSC RP1All of National Capital Region, ONCloses Oct 29, 2026via MERXUnderground UtilitiesView on official portal →
École Saint-Nom de Jésus Renovations Phase 2
12 days leftConseil Scolaire catholique du Nouvel-OntarioOntarioCloses Oct 29, 2026via MERXGeneral ContractorView on official portal →- Municipality of North GrenvilleOntarioCloses Oct 29, 2026via MERXSanitaryView on official portal →
Emergency Generator Replacement Project
13 days leftHanover and District HospitalHanover, OntarioCloses Oct 30, 2026via BiddingoElectricalView on official portal →Snow Removal Services at Waste Facilities
13 days leftDistrict Municipality of MuskokaBracebridge, OntarioCloses Oct 30, 2026via BiddingoSnow RemovalView on official portal →Painting Services as required
13 days leftPeel District School BoardMississauga, OntarioCloses Oct 30, 2026via BiddingoPaintingView on official portal →- EllisDon CorporationToronto, ONCloses Oct 30, 2026via MERXUnderground UtilitiesView on official portal →
- EllisDon CorporationToronto, ONCloses Oct 30, 2026via MERXUnderground UtilitiesView on official portal →
- Toronto Transit Commission - PCM CapitalToronto, ONCloses Oct 30, 2026via TTCElectricalView on official portal →
- Town of RenfrewOntarioCloses Oct 30, 2026via MERXMechanicalView on official portal →
- Department of Public Works and Government Services (PSPC)Ottawa, ONCloses Oct 30, 2026via MERXElectricalView on official portal →
- St. Joseph's Care GroupNorthwest, ONCloses Oct 30, 2026via MERXMechanicalView on official portal →
- Bruce PowerStratford-Bruce Peninsula, ONCloses Oct 30, 2026via MERXConcreteView on official portal →
RFQ 5875363871 — Economic Development & Culture
13 days leftCity of TorontoToronto, ONCloses Oct 30, 2026via City of TorontoLandscapingView on official portal →RFP - SNOW REMOVAL AND ICE CONTROL SERVICES
13 days leftDepartment of Public Works and Government Services (PSPC)OntarioCloses Oct 30, 2026via MERXSnow RemovalView on official portal →- Keewatin-Aski Ltd.Northwest, ONCloses Oct 30, 2026via MERXCivilView on official portal →
- University of Toronto – St. George Campus – Procurement ServicesToronto, ONCloses Nov 2, 2026via MERXRefrigerationView on official portal →
- Regional Municipality Of YorkCloses Nov 3, 2026via CanadaBuysHTMLSanitaryView on official portal →
- Western UniversityLondon, ONCloses Nov 3, 2026via MERXMechanicalElectricalView on official portal →
- JSCM CoOttawa, ONCloses Nov 3, 2026via MERXCladdingRoofingView on official portal →
- Weeneebayko Area Health AuthorityOntarioCloses Nov 4, 2026via MERXUnderground UtilitiesView on official portal →
- Engineering Services - Eastern RegionEastern, Ont.Closes Nov 4, 2026via MERXBridgeView on official portal →
- BGIS - RP4ON - 11 - Ottawa, ONCloses Nov 4, 2026via MERXElectricalView on official portal →
- PCL Constructors Canada Inc.Ottawa, ONCloses Nov 4, 2026via MERXFlooringView on official portal →
- University of Toronto – OREPToronto, ONCloses Nov 4, 2026via MERXMechanicalView on official portal →
- Humber River HealthToronto, OntarioCloses Nov 5, 2026via BiddingoElectricalView on official portal →
Preston Library HVAC Replacement
19 days leftCambridge Public LibraryCambridge, OntarioCloses Nov 5, 2026via BiddingoMechanicalView on official portal →Tender for the Replacement of Bancroft Standpipe
19 days leftJp2g Consultants Inc.Kingston-Pembroke, ONCloses Nov 5, 2026via MERXFire ProtectionView on official portal →Val Côté Lagoon Sludge Removal
19 days leftOntario Clean Water AgencyOntarioCloses Nov 5, 2026via CanadaBuysHTMLUnderground UtilitiesView on official portal →- City of OttawaOttawa, ONCloses Nov 5, 2026via MERXTraffic ControlView on official portal →
- St. Lawrence CollegeKingston-Pembroke, ONCloses Nov 5, 2026via MERXGeneral ContractorRoofingView on official portal →
LED Lighting
19 days leftCorrectional Service of Canada (CSC)OntarioCloses Nov 5, 2026via MERXElectricalView on official portal →- Bélanger Salach ArchitectureNortheast, ONCloses Nov 5, 2026via MERXMechanicalView on official portal →
- Ontario Shared ServicesOntarioCloses Nov 5, 2026via MERXUnderground UtilitiesView on official portal →
- PCL Constructors Canada Inc.Ottawa, ONCloses Nov 5, 2026via MERXPaintingView on official portal →
Electrical Service Upgrades
19 days leftSaint Paul UniversityOttawa, ONCloses Nov 5, 2026via MERXElectricalView on official portal →North Bay Station Backup Generator Project
19 days leftOntario Northland Transportation CommissionOntarioCloses Nov 5, 2026via MERXElectricalView on official portal →- The Corporation of the Municipality of Sioux LookoutSioux Lookout, OntarioCloses Nov 6, 2026via BiddingoUnderground UtilitiesView on official portal →
Integrated Facilities Management
20 days leftIndependent Electricity System OperatorOntarioCloses Nov 6, 2026via MERXElectricalView on official portal →- Toronto Transit Commission - PCM OperatingToronto, ONCloses Nov 6, 2026via MERXEquipment HireView on official portal →
Request for Proposals for R.C. Harris Water Treatment Plant Flat Roof Replacement and Solar PV Design
20 days leftCity of TorontoOntarioCloses Nov 6, 2026via MERXUnderground UtilitiesElectricalRoofingView on official portal →- MetrolinxSouthern OntarioCloses Nov 6, 2026via MERXMechanicalView on official portal →
Showing tenders 61–120 of 137 open, soonest closing first. Start free to see them scored to your profile →
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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.