Guides
Building in Quebec
Design-Build vs. the Traditional Route: Which Is Right for Your Project?
Two projects with the same drawings can be delivered two completely different ways, and the choice is made before design even starts. Design-build puts design and construction under one contract with one team. The traditional route — design-bid-build — splits them: you hire a designer to produce complete drawings, then tender those drawings to builders and hire one under a separate contract. The work is the same; what differs is who holds the contracts and who owns the coordination between design and construction. This guide lays out both honestly, including — especially — when the traditional route is the better call.
General guidance to help you choose a delivery model — not a rule. The right route depends on your specific building, budget, timeline, and how much of the process you want to run yourself.
The case for design-build
The argument for design-build is about mechanism, not marketing. Four things follow from putting design and construction under one contract:
- One accountable party. You hold one contract, not two, and there's no seam between a design firm and a construction firm for you to manage.
- Pricing happens during design, not after it. Because the builder is at the table while the design develops, cost problems surface while changes are still cheap — on paper — rather than after the drawings are done and a number comes back too high.
- The phases can overlap. Permits and procurement can start before the final drawings are signed, because the same team controls both, which can compress the overall timeline.
- No gap to blame across. When one party is responsible for both the design and the build, there's no designer and builder pointing at each other when something doesn't line up.
Those are real advantages, and they're structural — they come from combining the contracts, not from any one firm being better.
The honest trade-off
Here's the cost of the model, stated plainly, because the rest isn't credible without it. Design-build means less independent oversight of the builder — because the builder and the designer are the same party. In the traditional route, your designer reviews the builder's work with no stake in the construction contract; that's an arm's-length check on quality and cost.
In design-build, that independent check is gone: the party building the project is the party that designed it and is now reviewing it. On many projects that's an acceptable trade for single-point accountability. On some, it isn't — and that's the honest reason to consider the traditional route.
When the traditional route is the better choice
This is not a token section. There are real, common situations where design-bid-build is the right answer — and if one of these is you, it's the right answer regardless of what we sell.
- You want the lowest construction price on a fixed scope. Competitive tendering on completed drawings can produce a lower construction price, because builders bid against a fully-defined, fixed scope — they're competing on the same thing, and that competition is real leverage. If price certainty on a resolved design is your priority, a competitive tender is hard to beat.
- The process has to be tendered. Some public and institutional work requires a tendered process. You may simply not have the choice — the procurement rules mandate design-bid-build, and that settles it.
- You want a designer whose only loyalty is to you. If you want someone reviewing the builder's work with no commercial interest in the construction contract, separating the two roles gives you exactly that. On a project where that independent check matters — a demanding client, a complex build, a situation where you want a watchdog — the separation is a feature, not a friction.
- You have in-house project-management capability. A client with real PM capacity may prefer to hold both contracts and keep the control, running the coordination themselves rather than paying a single party to own it. If you can manage the seam design-build removes, you may not need to pay to have it removed.
- The design is fully resolved and won't change. Where a design is fully worked out before pricing and unlikely to move, the coordination advantage of design-build matters less — the thing it protects against, changes surfacing late, isn't a risk on your project.
If you've read that and thought “the traditional route sounds right for us,” that's a real conclusion, and the right one. The model should fit the project, not the other way around.
The Quebec layer — the same question either way
One thing does not change with the contract structure: the Architects Act. Some projects must have their design directed by an architect, regardless of whether you chose design-build or design-bid-build — the law looks at the building and the work, not at who holds the contracts. Sort that out before you pick a delivery model, because it can constrain both.
The same is true for permits. The building permit, the occupancy certificate, PIIA review, the fees and the timeline are the borough's business whoever holds your contracts — the delivery model doesn't change the approvals your project needs. We've written full guides on both questions; whichever route you take, settle these first.
How to choose
Neither model is universally better; the right one depends on what you're optimising for. Lean traditional if the lowest price on a fixed, resolved scope is the priority, if you want an independent designer with no stake in the build, if you have the in-house capacity to hold both contracts, or if the process must be tendered.
Lean design-build if you'd rather have one accountable party, cost surfacing during design instead of after, and overlapping phases to move faster — and you're comfortable that the builder and designer being the same party means less independent oversight.
Where IN Design & Construction fits
We're a design-build studio, so the one-contract model is how we work. We've laid out the traditional case in full because that's the honest way to write this — if a competitive tender or an independent designer is right for your project, that's the right call, and we'd rather you know it.
Where design-build fits, here's how we run it, end to end.
This is general information to help you weigh two delivery models, current as of 2026 — not advice on your specific project. The right choice depends on your circumstances, and where a project raises regulatory questions, confirm them with the relevant professional or authority (see the Architects Act and permit guides above).
Frequently asked
Design-build or traditional — your questions, answered.
Is design-build cheaper than the traditional route?
Not necessarily. Competitive tendering on completed drawings can produce a lower construction price, because builders bid a fixed scope. Design-build's advantage is different: cost certainty earlier and fewer late change orders, not a guaranteed lower number. We don't publish savings percentages — the outcome depends on your project.
When should I use the traditional design-bid-build route?
When the lowest price on a fully-resolved scope matters most, when the process must be tendered (some public and institutional work), when you want an independent designer with no stake in the construction contract, or when you have in-house project-management capability and prefer to hold both contracts.
Does the choice affect whether I need an architect?
No. The Architects Act applies to the same projects regardless of contract structure — some projects must have their design directed by an architect either way. See our architect-vs-designer guide for where that line falls.
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