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Ontario

Certificate of Qualification in Ontario

The last mile of an apprenticeship, one guide per trade. Closing the logbook and getting the hours signed, getting a straight answer out of Skilled Trades Ontario, challenging the exam on experience you already have, what is on the paper, and the licence that starts the day you pass.

Try this on a real business

Open a seeded business in your trade. Nine jobs on the pipeline, a quote sent and viewed, a deposit paid, an invoice overdue, and a holdback on the current month.

Open the demo business

No card, no form. Sign in later and everything you built stays on the same account.

48 guides on this

How to run the businessDealing with Skilled Trades OntarioNothing gets Skilled Trades Ontario to answer the phone faster. What you control is knowing your own expiry dates early enough to act, and building a dated paper trail while you wait rather than after you have lost.How to run the businessFinding a sponsorYour hours only count if an employer signs you up, and almost nobody advertises the position. Work from the public record of who just pulled a permit in your trade and your city instead of a queue with no front.How to run the businessChallenging the C of QThe assessment is a documentation exercise, and what stops people is a work history written in the wrong language. Get the hours, the scope and the people who will confirm them down while you still can.How to run the businessProvisional C of Q expiringIf you have just opened the notice and your stomach dropped, start here. Book the seat before you study, count backwards from the seat rather than forwards from today, and get your options from STO in writing.308A308A Sheet Metal WorkerC of Q exam prep and booking for the sheet metal trade, plus the post-cert layers — SMACNA standards, TAB certification, CWB welding, and the SMART union pathway through commercial HVAC and architectural work.313D313D Residential A/CC of Q exam prep for the residential A/C and heat pump trade, plus the ODP card, manufacturer dealer programs, geo-exchange / IGSHPA certification, and the 313D → 313A upgrade route.427A427A Sprinkler & Fire ProtectionC of Q exam prep, NFPA 13/14/20/24/25, NICET certification ladder, the Ontario Fire Code, the Office of the Fire Marshal, and the path to fire protection contracting.434A434A Powerline TechnicianC of Q exam prep for utility powerline work, plus the utility employment landscape (Hydro One, LDCs, OPG, private contractors), live-line and helicopter specialty certifications, storm response, and the PWU/IBEW union pathways.339A339A Mobile Crane Op 1C of Q exam prep for mobile crane operation (>16,000 lbs), load charts, rigging, critical lifts, CSA Z150, the Ministry of Labour inspection process, and the IUOE Local 793 / OETIO union pathway that defines the trade.339B339B Tower Crane OpC of Q exam prep for tower crane operation, the operational realities (cab life, signal-only lifts, wind limits), CSA Z248, climbing systems and erection, and the IUOE Local 793 / OETIO pathway that defines the trade.339C339C Mobile Crane Op 2C of Q exam prep for boom truck and picker truck operation (16,000–30,000 lb capacity), the owner-operator independent path, the 339C → 339A upgrade route, CDL pairing, and the IUOE Local 793 / OETIO pathway.451A451A Drywall, Acoustic & LathingC of Q exam prep for steel-stud framing, drywall installation, acoustic ceilings, exterior sheathing, and fire-rated assemblies — plus manufacturer certifications, the 453A finisher dual-credential path, and CDCO union dispatch.449A449A RooferC of Q exam prep for low-slope and sloped roofing, plus the manufacturer-certified installer ecosystem (Carlisle, GAF, Soprema, IKO, Firestone, Sika Sarnafil), Toronto Green Roof Bylaw work, solar PV integration, and the Roofers Union pathway.401A401A Brick & Stone MasonC of Q exam prep for brick, stone, CMU, and specialty masonry, plus heritage / restoration market access, hardscape and SRW manufacturer certifications, silica control, and the IUBAC Local 2 union pathway.244G244G Concrete FinisherC of Q exam prep for concrete placement, finishing, decorative, and polished concrete, plus the ACI certification ladder, decorative and polished concrete growth markets, and the OPCMIA Local 598 union pathway.426A426A Construction MillwrightC of Q exam prep for industrial machinery installation, plus the 426A vs 433A distinction, CWB welding qualifications, manufacturer training (Atlas Copco, Sandvik, ABB, Siemens), CSA Z460 LOTO, and the UBC Millwrights’ Locals union pathway.404C404C Painter (Commercial & Residential)C of Q exam prep for residential, commercial, and institutional painting plus surface prep, MPI Skilled and Master Tradesperson certifications, lead/asbestos protocols, manufacturer training, and the IUPAT DC 46 union pathway.404D404D Painter (Industrial)C of Q exam prep for industrial protective coatings — abrasive blasting, two-component epoxies and urethanes, immersion service, fireproofing — plus AMPP / NACE / SSPC certifications, manufacturer approved-applicator programs, and IUPAT industrial division pathway.452A452A Reinforcing RodworkerC of Q exam prep for rebar placement, post-tensioning, and concrete reinforcement, plus the Ironworkers Union pathway, CSA W186 rebar welding, post-tensioning manufacturer certifications, and the Red Seal "Ironworker — Reinforcing" designation.420A420A Ironworker (Structural & Ornamental)C of Q exam prep for structural steel erection, precast, mass timber, and ornamental ironwork, plus CWB welding qualifications, the Ironworker (Generalist) combo with 452A, and the Ironworkers Union pathway.636B636B HEO ExcavatorC of Q exam prep for excavator operation across construction, mining, forestry, demolition, and pipeline work, plus GPS / machine control specialty, owner-operator paths, and the IUOE Local 793 / OETIO pathway.636A636A HEO Tractor Loader BackhoeC of Q exam prep for TLB operation across residential, utility, landscape, and small commercial work, plus the most accessible HEO owner-operator path, year-round snow / construction revenue mix, and the IUOE Local 793 / OETIO pathway.453A453A Drywall Finisher & PlastererC of Q exam prep for taping, joint compound, plaster, and heritage restoration, plus GA-214 levels of finish, the 451A + 453A small-shop ownership combo, manufacturer certifications, and CDCO / OPCMIA union pathways.455A455A EIFS MechanicC of Q exam prep for exterior insulation finish systems, plus building science fundamentals, manufacturer approved-applicator programs (Sto, Dryvit, BASF/Senergy, Adex), and the path to commercial EIFS specialty contracting.448A448A Floor Covering InstallerC of Q exam prep for carpet, resilient, hardwood, and laminate flooring across residential, commercial, and institutional settings, plus ASTM moisture testing, manufacturer-certified installer programs, NWFA and CFI credentials, and accessible owner-operator paths.241A241A Terrazzo, Tile & Marble SetterC of Q exam prep for ceramic, porcelain, large-format tile, marble, granite, terrazzo, and waterproofed wet-area systems, plus TCNA / TTMAC methods, Schluter / Mapei / Laticrete certified installer programs, NTCA CTI credential, and IUBAC Local 31.253A253A Heat and Frost InsulatorC of Q exam prep for mechanical insulation on pipes, ducts, vessels, and equipment plus the asbestos abatement specialty pairing, TIAC and manufacturer certifications, and the HFIAW union pathway into industrial insulation work.253H253H Hazardous Materials WorkerC of Q exam prep for asbestos, mould, lead, mercury, PCB, and biological hazard removal — plus Ontario Reg. 278/05 and 490/09 framework, Type 1/2/3 certifications, IICRC AMRT, EACO standards, and the LIUNA / HFIAW union pathway.244H244H Restoration MasonC of Q exam prep for heritage masonry restoration — repointing with lime mortars, stone matching and dressing, Dutchman repairs, conservation principles — plus ACO and Ontario Heritage Trust training, manufacturer specialty programs, and the IUBAC heritage division.401R401R Refractory MasonApprenticeship completion guide for the industrial refractory trade — STO does not issue a C of Q for 401R. Covers logbook close-out, Apprenticeship Completion Certificate, industrial customer base (steel, cement, glass, petrochemical, power gen), and specialty career path.424A424A Architectural Glass & MetalC of Q exam prep for storefront, curtain wall, entrance systems, skylights, and specialty glazing — plus Kawneer / EFCO / YKK AP manufacturer certifications, AAMA standards, high-rise specialty, and the IUPAT Glaziers union pathway.450A450A Construction Craft WorkerC of Q exam prep for the broad-skill construction labourer trade across residential, ICI, infrastructure, mining, and railway sites — plus specialty certification stacks (asbestos, scaffolding, mobile equipment), and the LIUNA Local pathway.637C637C Concrete Pump OperatorC of Q exam prep for boom pumps, line pumps, and placing booms — plus power line proximity rules, ACPA CPO certifications, manufacturer training (Putzmeister, Schwing, Concord, REED), and the most accessible specialty equipment owner-operator path.296A296A Native Residential ConstructionApprenticeship completion guide for the First Nations residential construction trade — STO does not issue a C of Q for 296A. Covers logbook close-out, Apprenticeship Completion Certificate, Indigenous trades organizations (AABO, CCAB), Indigenous procurement frameworks, and First Nations housing career path.244K244K Precast Concrete ErectorApprenticeship completion guide for the precast concrete erection specialty trade — STO does not issue a C of Q for 244K. Covers logbook close-out, Apprenticeship Completion Certificate, CPCI / PCI standards, CWB welding pairing, the 420A / 244K relationship, and specialty erection career.244L244L Precast Concrete FinisherApprenticeship completion guide for the precast finishing specialty trade — under review by STO with no C of Q exam. Covers logbook close-out, the 244L scope, cross-trade certification path to 244G Cement Finisher, and the practical implications of the trade's under-review status.636C636C HEO DozerClosing out the 636C Heavy Equipment Operator (Dozer) apprenticeship — 2,260 hours, two levels of school, the C of Q exam, OHSA mobile equipment and Mines Regulation content, GPS / machine-control specialty, IUOE Local 793 / OETIO, and the Red Seal endorsement.How to run the businessThe licences your trade needsThere is no single contractor licence in Ontario, which is why every answer online contradicts another. Who regulates what, why your personal certificate is not the company licence, and the order that avoids dead time.309A309A ElectricianClosing out hours, booking the C of Q exam, exam prep, exam day, and the ESA / Master Electrician / LEC path that sits on top of the 309A certificate.306A306A PlumberClosing out hours, booking the C of Q exam, exam prep, plus the post-cert plumbing layers — municipal Master Plumber licensing, backflow prevention, TSSA gas tickets, and the UA pathway.307A307A SteamfitterC of Q exam prep and booking for the steamfitter trade, plus the regulatory layer — TSSA pressure piping, CWB and ASME welding qualifications, and the UA pathway into industrial mechanical contracting.313A313A Refrigeration & A/CC of Q exam prep, the Ozone Depletion Prevention (ODP) card, CSA B52, TSSA jurisdiction over industrial refrigeration, the refrigerant transition (CO2, ammonia, hydrocarbons), and the heat-pump market.403A403A General CarpenterC of Q exam prep for the broadest construction trade — residential framing through commercial formwork through finish work — plus the voluntary-credential value question, mandatory safety tickets, HCRA residential builder path, and the UBC union pathway.428A428A Construction BoilermakerC of Q exam prep for boilers, pressure vessels, tanks, and structural plate work in industrial settings, plus ASME Section IX welding qualifications, CSA B51, TSSA pressure equipment, API inspector certifications, and the Boilermakers Local 128 union pathway.After you qualifyTrade LicensingSkilled Trades Ontario, ESA/ECRA electrical licensing, TSSA, HCRA/Tarion, and municipal permits for construction trades.How to run the businessC of Q, then whatYour ticket lets you do the work. Something else entirely lets you sell it. Read the Last Mile guide for your code to the end, find out whether your trade needs a contractor licence, and look around a working business before you file anything.309C309C Electrician (D&R)Residential and rural scope, exam booking and prep, ESA Master Electrician path, the 309C → 309A upgrade route, and going owner-operator.308R308R Residential Sheet MetalC of Q exam prep and booking for the residential HVAC sheet metal trade, plus the TSSA gas-ticket pairing, the 308R → 308A upgrade route, and the path to owner-operator residential HVAC contracting.

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Finding construction work in OntarioBidding and prequalification in OntarioPricing construction work in OntarioChange orders and extras in OntarioGetting paid on Ontario constructionConstruction holdback in OntarioConstruction liens in OntarioHST for Ontario contractors
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