Construction Management in Toronto. How CM works for multi-unit and commercial projects.
What a construction manager does, how CM compares with a general contractor or design-build, which CCDC contracts apply, and what Ontario's 2026 Construction Act changes mean for payments on site.
Most construction overruns are decided long before anyone breaks ground. They are decided when the budget is set without real pricing, when the design is finished without a builder's input, and when trades are hired one at a time under pressure. Construction management exists to change that sequence.
This field note explains how construction management Toronto owners and developers use actually works: what a construction manager does, how CM compares with a general contractor or design-build, which CCDC contracts apply, and what Ontario's 2026 Construction Act changes mean for payments on site. It is written for owners of multi-unit and commercial projects deciding how their next build should be delivered.
Under construction management, the owner hires a construction manager early, usually while the design is still developing. The CM advises on cost, schedule and constructability during design, then procures and manages the trades during construction. Instead of pricing a finished design once, the project is priced continuously, and the people who will build it help shape it.
That is the core difference. A general contractor is typically hired after design is complete, on a lump-sum price. A construction manager is hired for judgment first and price second. Good construction management services earn their fee in the months before construction, when changes are cheap.
There are three common ways to deliver a project in Ontario, and each one allocates risk differently. We compared two of them in our field note on design-build vs. general contractor; construction management sits between them.
General contractor
Design completed, tendered and built for a stipulated price. High price certainty at signing, but no builder input into design, and changes after tender are expensive.
Design-build
One entity designs and builds under a single contract. Fast, with one point of accountability, but less direct owner control over design decisions.
Construction management
Owner keeps a separate design team and adds a CM early. The most transparency and flexibility; suits evolving scope or overlapping design and construction.
Fig. 02 · Relative, illustrative comparison
No model is right for every project. In our experience of construction management Toronto projects, CM tends to win where complexity is high, the schedule is tight, and the owner wants to see and approve every trade price rather than accept a single number.
A risk decision, not a paperwork decision.
In Canada, construction management is usually contracted on standard forms published by the Canadian Construction Documents Committee. Both were updated in 2025, the first full revision since 2010. Who holds the trade contracts is the line that separates them.
advises
CCDC 17
The owner holds trade contracts directly. More commercial risk for the owner, and full visibility of every subcontract.
holds trades
The CM holds the trade contracts and takes on more delivery risk, against an agreed fee and, where negotiated, a guaranteed maximum price.
Under CM at risk the owner gets a single contracting party for the work while still seeing the pricing behind it. Owners with in-house development teams often prefer CCDC 5A; owners who want one party accountable for delivery usually prefer CCDC 5B.
Phase by phase
Pre-construction
Where a CM adds the most value: constructability reviews, estimates at each design stage, alternative systems, a realistic schedule, and long-lead items such as electrical gear, elevators or windows. Our construction cost estimating starts here, not at tender.
Procurement
Work broken into trade packages, bidders prequalified, each package tendered, bids levelled like for like, and awards recommended. A multi-unit project can mean twenty or more packages.
Construction
Schedule, trade coordination, RFIs and shop drawings, quality, cost against budget, change orders and owner reporting. Mostly about information: everyone on the current drawing, schedule and budget.
Close-out
Deficiency lists, commissioning, warranties, manuals and as-builts, plus final holdback and payment steps under the Construction Act, so the first year of occupancy runs smoothly.
Construction manager vs. project manager.
The two titles are often used interchangeably, but they describe different roles. A construction manager is a contracted party responsible for delivering the work, with a defined place in the contract structure. Construction project management, or an owner's representative, usually means a consultant who protects the owner's interests across design, approvals and construction without building anything.
Larger owners sometimes use both. Smaller owners usually need one party who combines construction knowledge with clear reporting. The question is not the title but the accountability: who answers when the schedule slips?
Construction management Toronto projects need for multi-unit buildings
Toronto's multiplex permissions and rental demand have created many more multi-unit projects on ordinary residential lots. They look small but behave like commercial buildings: fire separations, sound control, separate services, sprinklers in some cases, and tight sites with neighbours on both sides.
Construction management pays off in sequencing: foundations start while upper-floor trades are still being tendered, and conflicts between structure, mechanical runs and fire separations are caught before they become change orders. See our notes on multiplex construction and choosing a multiplex builder in Toronto.
Multi-unit projects also live or die on cash flow. Monthly reporting on committed costs, contingency remaining and forecast completion, in the format the lender expects, keeps draws moving.
Construction management for commercial projects
Commercial projects bring a different pressure: the owner or tenant is paying rent or losing revenue until the space opens. Medical clinics, offices, retail and restaurants all involve specialist trades, landlord requirements and inspections that have to be choreographed.
Construction management helps by overlapping design and construction where it is safe, managing landlord and tenant work letters, and coordinating long-lead equipment. For tenant improvements, see our guides to commercial fit-outs in Toronto and office construction.
Commercial projects also tend to fall under site plan control, so approvals need to be part of the schedule from the start.
Toronto adds its own layer to every schedule. Building permits move through review streams with published targets, but a permit is only as fast as the drawings behind it, and commercial and larger multi-unit projects often need site plan approval first. Construction management Toronto owners can rely on treats approvals as a scheduled activity with owners and dates, not as a waiting period.
Sites themselves are the other constraint. A construction manager plans deliveries, crane picks and trade sequencing around these limits, keeps neighbours informed, and documents existing conditions next door before excavation starts.
Payment on Ontario construction projects is governed by the Construction Act. Since 2019 it has required prompt payment, with a holdback retained on each payment to protect lien rights.
What changed on 1 January 2026
Annual release is mandatory
Holdback is paid out annually on longer projects rather than held until the end, changing cash-flow planning for multi-year builds.
Deemed proper in 7 days
Unless the owner identifies a deficiency in writing, so invoice review processes have to be faster.
Expanded to 90 days
After completion, abandonment or termination; private adjudicators now allowed alongside the ODACC roster.
Design professionals can lien
For work on planned improvements, even before construction starts.
A construction manager should build these rules into the payment schedule and reporting, so that the owner is never surprised by a deadline.
Site safety and the constructor's duties
Under Ontario's Occupational Health and Safety Act, the constructor has overall responsibility for the project and significant legal duties for site safety. On a CM project the contract must say clearly who the constructor is, and where an owner holds trade contracts directly, as under CCDC 5A, this deserves particular care.
- 01File a Notice of Project where labour and materials exceed $50,000, among other triggers in O. Reg. 213/91, and post it on site.
- 02Request locates through the Ontario Dig Authority, successor to Ontario One Call, at least five business days before excavation.
- 03Confirm every trade has a current WSIB clearance before it sets foot on site.
How construction managers are paid
Fees vary with project size, complexity and risk, so any firm quoting a percentage before reviewing the drawings is guessing. Common structures stack like this:
What matters most is transparency: open-book cost reporting lets the owner see exactly where the money goes.
Five questions to ask.
- 01
Pre-construction
What exactly will they deliver before construction starts, and when?
- 02
Reporting
Request a sample cost report and schedule update from a current project.
- 03
Who runs your site
Meet the superintendent and project manager, not just the principal.
- 04
Relevant experience
Multi-unit or commercial projects like yours, in Toronto, with Toronto approvals.
- 05
Risk
How do they handle the constructor role and the 2026 holdback rules? The answer tells you how seriously they take risk.
Working with 6ixBuild.
6ixBuild provides construction management services, design-build delivery and general contracting for residential, multi-unit and commercial projects across Toronto and the GTA. We are part of 6ixGroup, working alongside our architecture and engineering partner 6ixDesign, so design questions are answered in days rather than weeks. When permit-ready drawings are needed first, 6ixDesign prepares building permit drawings for Toronto projects in-house.
Our construction management work covers pre-construction estimating, scheduling, trade procurement, cost control, health and safety oversight, quality control and progress reporting. See our work in our project stories and learn more about 6ixBuild.
Good construction management Toronto projects deserve is not about one heroic site meeting. It is the steady work of pricing early, buying carefully, keeping everyone on current information and making risk visible before it becomes cost.
Price early, buy carefully, make risk visible before it becomes cost.
Frequently asked questions
What does a construction manager do?
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A construction manager joins a project early to advise on cost, schedule and constructability during design, then procures and manages the trades during construction. Typical responsibilities include estimating, scheduling, tendering trade packages, coordinating the site, controlling cost and quality, managing changes and reporting to the owner.
What is the difference between construction management and a general contractor?
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A general contractor is usually hired after the design is complete and builds it for a fixed price. A construction manager is hired earlier, contributes to the design, and manages trade procurement and construction with more transparency into individual trade prices. Construction management suits complex or fast-track projects; a general contractor suits projects with a complete design and a priority on price certainty at signing.
What is the difference between CCDC 5A and CCDC 5B?
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Both are Canadian standard construction management contracts, updated in 2025. Under CCDC 5A the construction manager provides services only and the owner holds the trade contracts. Under CCDC 5B, often called construction management at risk, the construction manager provides services and construction and holds the trade contracts, taking on more delivery risk.
How are construction managers paid?
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Commonly through a pre-construction fee, a construction fee calculated on the cost of the work, and reimbursement of general conditions such as site supervision and temporary facilities. Under construction management at risk, a guaranteed maximum price may also be agreed once the design is sufficiently developed. Fees depend on project size, complexity and risk.
What changed in Ontario's Construction Act on 1 January 2026?
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Key changes include mandatory annual holdback release, invoices being deemed proper unless the owner identifies a deficiency in writing within 7 days, an adjudication window of up to 90 days after completion, abandonment or termination, the use of private adjudicators, and lien rights for design professionals on planned improvements.
Who is the constructor on a construction management project in Ontario?
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The constructor is the party with overall responsibility for the project under the Occupational Health and Safety Act. On construction management projects the contract should state who the constructor is, and this needs particular care where the owner holds trade contracts directly. The constructor files the Notice of Project and carries significant site safety duties.
Let's talk about how your project should be built.
The cheapest moment to change a project is before it is priced and before trades are hired. Whether you are planning a multiplex, a mid-rise rental building, a medical clinic or a commercial fit-out, we can review your drawings, budget and timeline and recommend the delivery model that fits.
Bring the drawings you have, the budget you are working to and the date you need to open. We make your story a reality.
