Most owners pick a general contractor by opening envelopes and circling the lowest number. If you prequalify first, on bonding, safety, capacity and track record, every price you open comes from a builder you would actually hire.
Why prequalification beats an open tender
An open tender invites anyone with a bid bond to compete. That sounds fair, but it pushes the hard question (can this firm build my project?) to the point where you are under pressure to award.
Prequalification turns that around. You decide who is capable before price enters the room, so the tender becomes a contest between equals. It also signals to good contractors that their estimating time won't be wasted against a firm that bid low because it missed half the scope.
Start with CCDC 11, not a homemade questionnaire
The Canadian Construction Documents Committee publishes CCDC 11 – 2019, the Contractor's Qualification Statement. CCDC describes it as a standard form for pre-qualifying contractors and subcontractors, with or without a formal pre-qualification process. Contractors know it, so responses come back faster and more complete.
It collects:
- Legal structure, year established and the firm's principals.
- Financial, contract security (bonding) and insurance references, plus health and safety information.
- Projected construction volume for the current year and actual volume for each of the past four years.
- Qualifications of the key office and site people proposed for your project.
- Five relevant projects in each of three categories: key projects completed in the past five years, comparable completed projects, and key projects underway.
Use the standard form and add a short project-specific supplement rather than rewriting it. CCDC also publishes CCDC 29, A Guide to Pre-qualification, for recommended practice.
The pass/fail gates
WSIB clearance. A clearance is a number the WSIB issues to show a business is registered and up to date. WSIB says construction clearances must be in place before work begins and for the duration of the work. They are valid for up to 90 days, and most expire on the 20th of February, May, August and November, so check again at award and during construction, not just at prequalification. You can verify a clearance through WSIB's online services without logging in.
Bonding. Ask for a letter from the contractor's surety confirming it will provide the bonds your tender requires. A bid bond backs the promise to sign the contract and furnish the other bonds. The federal government's standard form, for example, sets it at 10% of the bid to a maximum of $2 million. A performance bond guarantees the contractor will perform its obligations under the contract. A labour and material payment bond guarantees payment of documented claims from direct subcontractors and suppliers. On Ontario public-sector contracts of $500,000 or more, the Construction Act requires both bonds at no less than 50% of the contract price. Private owners set their own requirements, and they should.
Insurance. Get certificates that match the limits and coverage in your contract, then have your broker review them. A mismatch is a no, not a "we'll sort it out later."
The scored criteria
Comparable experience. Score projects that match yours in type, size and delivery model.
The named team. You're hiring a superintendent and a project manager, not a logo. Require names, and make substitution after award subject to your approval.
Safety record. The Infrastructure Health and Safety Association (IHSA) is the designated body certifying contractors for COR (Certificate of Recognition) in Ontario construction. The City of Toronto phased in COR for its contracts, starting with contracts over $25 million in 2017 and reaching contracts under $10 million in 2019. CCDC 11's Ontario workers' compensation table also asks for fatalities and lost-time incident frequency per 200,000 hours.
Financial capacity. Compare your project to the four years of volume reported in CCDC 11. If your job would be most of their annual volume, the risk sits with you.
What to do: an owner's prequalification checklist
- Set the gates and the scoring weights before you issue anything, and write them down.
- Issue CCDC 11 with a one-page supplement for project-specific questions.
- Screen out anyone who fails a gate. No exceptions for "great relationships."
- Score the rest against the written criteria, with at least two evaluators.
- Call references and ask what went wrong and how the contractor handled it.
- Check WSIB clearance and COR status yourself rather than relying on attachments.
- Shortlist, then carry the qualification scores into bid evaluation.
Evaluating bids beyond the lowest price
A low bid usually means one of three things: real efficiency, missed scope or a plan to recover margin through change orders. Before award, level the bids by checking exclusions, allowances, qualifications, schedule, and site staffing. If the low bid is well below the pack, ask the contractor to walk you through it.
The cost of a bad award shows up later as claims and delay, which we cover in our cost overrun audit lessons. This is also where an owner's rep earns their fee.
Frequently asked questions
Is CCDC 11 mandatory in Ontario?
No. It is a standard industry form, not a legal requirement, but using it gets you consistent, comparable answers from contractors who already know it.
Do private owners need performance and payment bonds?
The Construction Act bonding requirement applies to public-sector owners. Private owners can require bonds by contract, and on most commercial projects they should.
How often should I check a contractor's WSIB clearance?
At prequalification, at award, and before each payment. Clearances last up to 90 days, so one check at tender doesn't cover the whole job.
The bottom line
Prequalification is where you control risk cheaply. Set firm gates, score what matters, verify it yourself, and only then let price decide among builders you trust. On the legal points, especially bonding and the Construction Act, confirm with your lawyer.
Planning a tender and want a second set of eyes on your prequalification? Book a 30-minute call.
Sources: CCDC, CCDC 11 – 2019 Contractor's Qualification Statement; CCDC, CCDC 11 one-page summary; CCDC, Guidance on the workers' compensation table (Ontario); WSIB, Clearances – Frequently Asked Questions; Ontario Bar Association, A Bargain Struck: Surety Bonds under Ontario's New Construction Act; Government of Canada, Bid Bond (form 504); bids&tenders, What are Surety or Performance Bonds?; City of Toronto, Certificate of Recognition Program. This article is general information, not financial or legal advice.