For a full gut renovation, a second-storey addition, or anything with structural changes, hire an architect. For routine single-family permit drawings and smaller-scale residential work, a qualified BCIN building designer is often enough. Municipal rules and project specifics can override either default, so check before you commit. The checklist below sorts out which applies to your project.
TL;DR:
- Hire an architect for structural changes, second-storey additions, or projects with complex engineering or load-bearing modifications.
- Use a BCIN building designer for simple, small-scale residential projects such as interior renovations or straightforward additions within house-category limits.
- Expect greater scope, oversight, and liability coverage with architects, as they hold a license regulated by the Ontario Association of Architects, unlike BCIN designers.
- Confirm licensing, scope of work, and review services upfront by asking candidates specific questions about their credentials and experience before hiring.
- Large or multi-component projects often require an architect’s involvement early to streamline permit approval, construction coordination, and avoid costly rework.
Table of Contents
- What an architect is: training, licence, and typical services
- What a BCIN building designer is: qualifications and scope
- Key differences: education, regulation, liability and practical effects
- When to hire which: decision criteria and questions to ask
- Permits, timelines and cost drivers when you hire each professional
- Client perspective: a single accountable lead through design and construction
- Practical takeaways from renovation work
- Consider Y&CO Build as an alternative
- Sources
- FAQ
What an architect is: training, licence, and typical services
An architect is a licensed professional whose title is protected under the Architects Act, and in Ontario that licence is regulated by the Ontario Association of Architects. Getting there means a professional degree, supervised internship hours, licensing exams, and ongoing OAA membership. Licensed members hold a certificate of practice and carry professional liability insurance, which matters once something goes wrong on site and someone needs to be accountable for the fix.
Architects typically handle:
- Full-scope design, from concept sketches through construction drawings.
- Coordination with structural, mechanical, and electrical engineers on complex builds.
- Permit application leadership for projects that exceed straightforward residential scope.
- General review during construction, checking that what gets built matches what got approved.
Not every home project needs this level of service, but anything involving major structural change, multiple storeys, or unusual site conditions usually benefits from it.
What a BCIN building designer is: qualifications and scope
A building designer who wants to submit permit drawings in Ontario needs to be registered with the Ministry of Municipal Affairs and Housing and hold a Building Code Identification Number, earned by passing qualification exams tied to specific categories of work. This BCIN registration is what lets a designer legally submit designs for permit review, separate from any architectural licence.
Designers with the right BCIN qualifications commonly handle:
- Permit drawings for single-family homes, additions, and interior alterations.
- Small-scale residential renovations where the scope stays within house-category limits.
- Straightforward projects without unusual structural or engineering complexity.
Where designers hit a ceiling is scope. Larger, more complex, or higher-risk buildings fall outside what a BCIN designer is qualified to stamp, and that's where an architect's licence becomes necessary rather than optional.
Key differences: education, regulation, liability and practical effects
The credential gap between the two professions translates directly into who can sign what, who carries what insurance, and how much oversight you get once construction starts.
- Credential and legal accountability. Architects are licensed under the Architects Act and answer to the OAA; designers operate under a BCIN issued by the Ministry, a narrower form of qualification tied to specific project categories.
- Insurance and risk transfer. An architect's certificate of practice comes with professional liability insurance, which shifts a meaningful share of design risk away from the homeowner. Many BCIN designers carry insurance too, but it's worth confirming rather than assuming.
- Scope of legally permitted work. Both must ensure designs meet the Building Code Act, but a designer's BCIN caps the size and complexity of what they can submit, while an architect has no such ceiling.
- Construction oversight. OAA members commonly provide general review, meaning they check that the finished work matches the approved drawings. That kind of ongoing site verification is a standard architectural service, not something every designer engagement includes.
The practical effect: a project with structural changes, additions, or multiple trades in play generally gets more design detail and more construction-phase coordination when an architect leads it, simply because that's built into how the credential works.
When to hire which: decision criteria and questions to ask
Match the professional to the project before you match personalities. Complexity and risk are the two variables that matter most.
- Choose an architect for structural changes, second-storey additions, multi-unit conversions, or anything touching load-bearing walls or foundations.
- Choose a BCIN designer for a straightforward kitchen or bathroom remodel, a small addition with no structural surprises, or interior layout changes that don't touch the building envelope.
- Choose a contractor-managed process when you'd rather have one accountable lead coordinate the designer or architect, the engineers, and the trades, instead of managing each relationship yourself.
Before hiring anyone, ask directly:
- Are you an OAA member, a licensed technologist, or a BCIN-registered designer, and can you show proof?
- Who will stamp or seal the drawings, and does that match the scope of my project?
- Can you show me a similar project you've completed, ideally one close in size and complexity?
- What does your general review service include, and is it billed separately?
Pro Tip: Ask every candidate the same four questions in the same order. It makes the answers easy to compare and quickly exposes vague or evasive responses.
Red flags worth walking away from: no verifiable licence or BCIN number, a scope of work that stays deliberately vague, or reluctance to coordinate directly with the municipality on your behalf.
Permits, timelines and cost drivers when you hire each professional
Your choice of professional shapes more than the drawings. It affects how fast permits clear, how many consultants get pulled in, and where the budget actually goes.
- Larger or structurally complex projects often need an architect's involvement before the municipality will process the permit at all.
- General review during construction adds a layer of verification that can catch problems early, but skipping it to save money raises the odds of costly rework later.
- Typical fee drivers include base design fees, additional consultant costs for engineering, and municipal permit and administration fees, which vary by jurisdiction and are worth confirming locally, including through resources like Parks Canada's fee schedules as a general example of how permit fee categories are structured.
OAA guidance describes general review as a standard of care obligation, tied directly to the Architects Act, not an optional add-on for members providing it. Skipping that check to save a few dollars on a structural project is a common way homeowners end up paying twice, once for the mistake and once for the fix.
Sequencing also matters. Finalizing structural drawings before ordering custom millwork or cabinetry, for instance, avoids the expensive redesign that happens when window openings shift after cabinets are already built. A detailed cost breakdown can help homeowners see where these fee categories typically land before committing to a scope.
Client perspective: a single accountable lead through design and construction
Some homeowners want the architect and designer relationship to be someone else's job to manage. Y&CO Build's eight-stage renovation process puts Cory Yefet as the single point of contact from feasibility study through completion, coordinating designers and engineers rather than leaving the homeowner to translate between separate consultants.
- One person tracks scope, budget, and schedule across the entire project.
- Design decisions get filtered through a single accountable lead instead of multiple disconnected voices.
- The Galley Avenue renovation in Roncesvalles shows this in practice: a full-home renovation that preserved the house's original character while updating the layout to suit the owners' lifestyle.
This model suits homeowners who'd rather hand off coordination entirely than manage separate professional relationships themselves.
Practical takeaways from renovation work
The homeowners who avoid budget surprises are the ones who write a clear functional brief before calling anyone, and who insist on one accountable point of contact instead of juggling three. Cost matters, but the trade-off is real: less oversight tends to mean more risk sits with you.
— Cory
Consider Y&CO Build as an alternative
If the decision framework above points you toward a larger addition, a full gut renovation, or a project with enough moving parts that you'd rather not manage each consultant yourself, that's exactly where a contractor-managed approach earns its place. Some contractors offer full-home renovations, rear additions, full second-storey additions, and combined rear-plus-second-storey additions, often with a single contact managing the project from feasibility through completion.
This approach suits homeowners tackling substantial scope, not minor repairs, and it works alongside qualified designers and architects rather than replacing the need for one on structurally complex jobs.
| Project type | Typical approach |
|---|---|
| Full-home renovation | Single accountable lead managing design, permits, and construction |
| Rear addition | Coordinated design and structural planning under one contact |
| Second-storey addition | Architect-level design paired with contractor-managed construction |
| Combined rear and second-storey addition | Full-scope coordination across design, engineering, and build |
Pro Tip: Ask any contractor how many people you'll need to talk to over the course of the project. If the answer is more than one or two, expect more coordination work to fall on you.
For homeowners further west, Blue Brothers offers a comparable contractor-managed renovation model, a useful reference point if you're weighing what single-point accountability looks like elsewhere. If a managed, full-scope renovation or addition fits what you're planning, contact Y&CO Build to talk through feasibility and scope.
Sources
For the regulatory detail behind these distinctions, go straight to the primary sources.
FAQ
Is Donald Trump an architect?
No, he is not a licensed architect. He has worked as a real estate developer, and developers commonly hire architects and designers rather than holding the credential themselves.
Can I call myself an architectural designer?
The title depends on your jurisdiction's rules: "architect" is a protected title under the Architects Act and cannot be used without a licence, but "architectural designer" is sometimes used by BCIN-registered designers who are not licensed architects. Confirm local rules before using any title professionally, since misuse can carry legal consequences.
Do architects build or just design?
Architects design and coordinate, but they generally do not perform the physical construction themselves. Licensed members typically provide general review during construction to confirm the built work matches approved drawings, while contractors and trades handle the actual building.
What's the difference between an architect and an interior designer?
An architect handles structural design, permits, and code compliance, while an interior designer typically focuses on finishes, layout aesthetics, and furnishings within an existing structure. For projects involving structural changes, you need an architect regardless of whether an interior designer is also involved.
When should I hire a designer instead of an architect?
A BCIN-registered designer is often the more cost-efficient choice for straightforward residential work like a kitchen remodel or a small addition without structural complexity. Once a project involves load-bearing changes, multiple storeys, or unusual site conditions, an architect's broader scope and insurance coverage become the safer choice.