01
Review can proceed from the current file
The drawings contain enough reliable information for the engineer to begin the technical review. Additional calculations, notes or supporting documents may still be required before final issue.
◆ Engineering review for existing drawings
Engineering Review & P.Eng Stamp Services in Toronto
Already have drawings, calculations or a permit file that needs engineering review? iPermit helps identify what can be reviewed, what needs revision and what information the responsible professional needs before a final engineering document can be issued.
◆ Existing drawing review
Can an Engineer Stamp Drawings Prepared by Someone Else?
Sometimes — but the answer depends on what the drawings contain and whether the engineer can perform enough professional review to take responsibility for the engineering content.
An existing drawing can be a useful starting point. It is not automatically ready to be signed and sealed just because it looks complete or has already been used for pricing, construction planning or a permit submission.
Before a final engineering document is issued, the responsible professional may need to verify the design basis, check calculations, confirm loads, review related drawings, request missing information, mark up the existing set, require revisions or inspect relevant site conditions.
The result of the first review usually falls into one of four paths.
02
The drawings need revisions first
The overall design may be usable, but dimensions, member sizes, details, notes, coordination or code information need to be corrected before the professional can accept responsibility for the final engineering content.
03
New calculations or engineering design are required
A drawing may show what someone wants to build without demonstrating why the proposed design works. Where engineering analysis is missing, the next step is not simply a stamp — it is the engineering work needed to support the final design.
04
Existing conditions or original responsibility must be clarified
A site visit, photographs, measurements, previous permit records, field exposure or input from the original designer may be needed when the available documents do not reliably describe the existing condition or the basis for a new professional to assume responsibility is not clear.
◆ Professional responsibility
A P.Eng Seal Carries Defined Professional Responsibility
When a licensed Ontario professional engineer signs and seals a drawing, plan, specification, or report, the seal identifies responsibility for the engineering work covered by that document.
That responsibility is limited to the stated scope. For example, a structural engineer may be responsible for a beam, connection, foundation, or framing design without taking responsibility for architectural, zoning, mechanical, or electrical work.
The sealed document should be reviewed together with its notes, assumptions, revisions, and defined scope. A seal does not automatically apply to the entire permit package or future revisions.
It also does not guarantee municipal approval, as Toronto Building or another authority still reviews the full application.
◆ Review basis
What Gets Checked Before an Engineering Document Can Be Sealed?
The exact technical work depends on the discipline and project, but a responsible review usually needs a dependable basis in several areas.
01
Purpose and jurisdiction
The reviewer needs to know what the document is for, where the project is located and which authority or project requirement is asking for the engineering review. A permit drawing, shop drawing, equipment-support detail and construction-stage letter are not the same assignment.
02
Current drawing revision
The engineer needs the actual current set. Old plans, superseded markups and a new contractor sketch mixed together can create uncertainty about what is being reviewed and what will eventually be built.
03
Design basis and loads
The engineer may need information about spans, materials, loads, equipment, reactions, occupancy, use, support conditions or other design assumptions. A drawing that shows geometry without its engineering basis may require additional analysis.
04
Calculations and supporting design
Where calculations are needed, they must support the final design being issued. Existing calculations may be reviewed when they are relevant and reliable; missing or incompatible calculations may need to be prepared again.
05
Coordination with related drawings
A technical design can be correct in isolation and still conflict with the project. Openings, equipment, ducts, columns, ceilings, foundations or architectural dimensions need to match the current coordinated set where those items affect the engineering scope.
06
Existing conditions and site evidence
When the design depends on an existing building or completed work, the reviewer may need photographs, measurements, record drawings, selective exposure or a site visit. The level of verification depends on what the engineer needs to know before accepting responsibility.
◆ Existing-file review
Third-Party Drawings, Shop Drawings and City Comments Are Different Review Problems
Do not treat every request for an “engineering stamp” the same way. The correct review path depends on what the document is, who prepared it and what professional responsibility is being requested.
Drawings prepared by another designer
A drawing prepared by a contractor, designer or another consultant can sometimes be reviewed as a starting point. The engineer still has to establish the design basis and perform the professional work required for the final scope. Some files need only focused revisions; others require significant recalculation or redesign.
Shop or fabrication drawings
A shop-drawing review may only be a review for general conformance with the design intent. That is different from the engineer taking responsibility for the underlying product or connection design. Whether a sealed engineering document is appropriate depends on the actual delegated design responsibility and the agreed scope — not simply on the fact that a fabricator wants a stamp before production.
Municipal review comments
If Toronto Building or another municipality has asked for engineering information, send the full submitted drawing set together with the comments. The comment letter by itself rarely shows enough context to determine what the examiner reviewed, which revision is current or what technical response is required.
Work that is already built
Completed construction changes the assignment. The professional may need field review, exposure, measurements or other evidence before giving an opinion about existing work. If the requirement is a construction-stage engineering letter or sign-off after site review, that is a different service from reviewing a drawing set before construction.
◆ Toronto permit context
Toronto Projects: AREC and Reliance on the Professional Engineer's Seal
Toronto has a Reliance on Professional Engineer’s Seal program for eligible house-stream projects. The program can apply to defined new-house and alteration work, accessory structures and certain other eligible engineering content.
When drawings or documents within that program bear a professional engineer’s seal, the designing engineer completes the City’s Assumption of Responsibility for Engineering Content (AREC) form to identify the content for which professional responsibility is being assumed.
Three points matter before treating AREC as a shortcut:
01
AREC is scope-specific
If the engineer is only responsible for part of the design, the form identifies that part. A structural seal does not automatically absorb responsibility for architectural, mechanical, zoning or other content outside the engineer’s assignment.
02
The seal does not replace zoning or applicable-law review
Toronto still requires the project to satisfy the zoning and applicable-law process that applies to the permit application. Professional engineering responsibility for technical content is not a substitute for those separate approvals.
03
General review during construction is a separate question
Where the Ontario Building Code requires professional general review, Toronto may also require the appropriate Commitment to General Review documentation. That construction-stage responsibility should not be assumed to be included just because the design drawings are sealed.
◆ Review coordination
What iPermit Coordinates for an Engineering Review
Start with the file you already have. The useful first step is not choosing a stamp package. It is determining what the existing documents can support and which professional responsibility is actually required.
Depending on the assignment, iPermit can coordinate:
01
File triage
Review the current drawings, sketches, calculations, municipal comments and project history to identify the starting point and obvious information gaps.
02
Discipline routing
Determine whether the issue is primarily structural, mechanical, electrical or another defined engineering scope, and whether the project instead needs new permit drawings or another design service before professional review can be completed.
03
Review inputs
Organize the drawings, dimensions, design criteria, equipment information, site evidence and other inputs the responsible professional needs to evaluate the work.
04
Revisions and calculations
Coordinate required drawing corrections, supporting calculations or design updates identified during the engineering review.
05
Municipal-comment response
When the file is already under review, coordinate responses and revised documents for comments that fall within the agreed engineering scope.
06
Final professional documentation
Where the licensed professional has completed the required review and is prepared to assume responsibility for the engineering content, the final engineering documents can be signed and sealed within that professional’s defined scope.
◆ Review process
How the Engineering Review Moves Forward
The stamp comes at the end of a defined review path. The exact technical work depends on the file, but the workflow should make responsibility and missing information visible before final issue.
01
Define
Define the purpose
Confirm what document is being requested, who is asking for it, the property or project location and whether the need relates to permit, fabrication, construction or another approval.
Scope
02
Review
Review the current file
Collect the complete current drawing set, calculations, sketches, municipal comments and supporting records. Establish which revision is actually in use.
File
03
Assign
Confirm responsibility
Identify the engineering discipline and the exact content the responsible professional is being asked to review. Separate that scope from work that belongs to other designers or authorities.
Responsibility
04
Resolve
Resolve technical gaps
Complete the calculations, revisions, clarifications, coordination or site verification required before the engineer can make a professional decision about the final document.
Technical
05
Finalize
Finalize the reviewed document
Update the drawing, calculation or report to the version that reflects the accepted engineering scope and the information relied upon during the review.
Final
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Issue
Issue and coordinate the next step
Where the engineer accepts responsibility, the final engineering document is signed and sealed. If the assignment is connected to a permit file, the related municipal response or submission can then proceed within the agreed scope.
Next step
◆ Scope boundaries
What This Service Does Not Replace
Engineering review should solve the right problem — not hide a different one. Four boundaries matter before a review-and-seal assignment is defined.
01
A building permit decision
The municipality remains responsible for issuing or refusing the permit. A professional seal does not guarantee approval or eliminate zoning, applicable-law, administrative or other discipline requirements.
02
New engineering design when the file is not supportable
If the current drawing does not contain a defensible design, the required service may become engineering design and calculations rather than review of an existing design.
03
A construction-stage engineering sign-off letter
A sign-off, conformance or site-review letter usually depends on what was actually constructed and what the professional has been able to verify in the field. That is a different problem from reviewing drawings before they are issued or submitted.
04
Responsibility for later changes
A seal applies to the final document and scope reviewed by the professional. If the design changes later, the revised work may require another professional review before it can be relied upon.
◆ Related design paths
If the Review Shows That You Need New Design Work
Do not keep paying for review when the real requirement is a new design scope. An existing file sometimes reaches the point where professional review alone is no longer the useful service. When that happens, the project should move to the page that owns the new design work.
Permit drawings
Use this path when the architectural or permit set itself needs to be created, rebuilt or coordinated before the engineering discipline can complete its work.
Mechanical
Use this path when the project needs a new mechanical design, calculations or coordinated permit drawings rather than review of an existing mechanical document.
Electrical
Use this path when the issue is a new electrical layout, capacity/load question, electrical permit drawing or ESA-related design path rather than an existing-document review.
◆ Project intake
What to Send for an Initial Engineering Review
Send the full current file, even if it is not organized yet. You do not need to determine whether the project requires drawing revisions, calculations, field verification or another engineering scope before contacting iPermit. The initial review is intended to establish that.
Start with the project address and municipality, the exact request you have received, and the most current drawing set available. If a municipality, contractor, fabricator, landlord, designer or other party has requested an engineering review, letter or sealed document, include their written request or comments where possible.
Also send any information that helps explain how the design has developed, including previous revisions or markups, existing calculations, equipment data, loads, specifications or other technical information. For existing buildings or completed work, photos, measurements and available site records can help determine whether field verification may be required.
If the project is already under municipal review, include the submitted drawing set, application information and complete City comments rather than sending individual comments without context.
Finally, tell us what the engineering review is currently blocking, such as a permit submission, response to municipal comments, fabrication, construction or another project decision. This helps define the appropriate scope before responsibility is assigned to a final engineering document.
◆ Engineering review questions
Engineering Review & P.Eng Stamp FAQs
These questions address the practical difference between professional review, sealing, municipal requirements and construction-stage sign-off so the file starts in the right service.
Can a professional engineer stamp drawings prepared by someone else?
Potentially. An engineer may be able to review documents prepared by another person and then assume responsibility for defined engineering content, but only after completing enough professional review to support that responsibility. The file may require revisions, calculations, clarification or site verification before a final sealed document can be issued.
Can I pay only for a P.Eng stamp?
The seal is not a standalone product that can be added without professional review. The engineering service is the review, analysis, design or checking required for the professional to take responsibility for the final engineering content. The seal authenticates that responsibility.
What does a P.Eng seal mean in Ontario?
It identifies a final engineering document for which a licensed professional engineer has assumed responsibility for the engineering content within the stated scope. It should not be interpreted as responsibility for unrelated disciplines or work that the engineer did not review.
Will my existing drawings need to be revised before they are sealed?
Possibly. Some files need only focused corrections, while others require new calculations, redesigned details or a coordinated drawing revision. The first review determines whether the current material is technically supportable.
Is a site visit always required before an engineer can seal drawings?
No. Whether a site visit is necessary depends on what the engineering decision relies on and how reliable the available information is. Existing-condition work, completed construction and uncertain framing or support conditions are more likely to require field verification than a fully documented new design.
Can shop drawings be stamped by a P.Eng?
It depends on the professional responsibility being requested. A shop-drawing review for general conformance is not automatically the same as assuming responsibility for the underlying engineering design. If delegated engineering design is part of the scope, the responsible professional must have enough information and authority to review and take responsibility for that defined content.
Can you help after the City has already issued engineering comments?
Yes. Send the full drawing package that was submitted together with the municipal comments. The complete file is needed to understand the examiner’s concern, identify the correct discipline and determine whether the response requires clarification, revision, calculations or a new professional document.
Does a P.Eng seal guarantee a Toronto building permit?
No. The seal addresses professional responsibility for specific engineering content. Toronto Building still considers the rest of the permit application, including zoning, applicable law, administrative requirements and any other design disciplines that apply.
What is the Toronto AREC form?
AREC stands for Assumption of Responsibility for Engineering Content. For eligible Toronto house-stream applications where drawings or documents bear a professional engineer’s seal, the designing engineer uses the form to identify the content for which they are assuming professional responsibility. It does not replace zoning or applicable-law review.
Does the engineer's seal cover the entire permit package?
Not necessarily. Professional responsibility may be limited to a specific structural, mechanical or other engineering scope. The rest of the permit package can remain under the responsibility of other designers, professionals or the applicant as applicable.
Is an engineering sign-off letter the same as a stamped drawing review?
No. A drawing review is generally concerned with the engineering design or document before it is issued or relied upon. A construction-stage sign-off or conformance letter may require site review and evidence of what was actually built. The correct service depends on what the municipality, owner or project team is asking the engineer to confirm.
What should I send for an engineering review quote?
Start with the project address, the complete current drawing set and a short explanation of what you have been asked to provide. Add any calculations, photographs, municipal comments, previous revisions and technical data you already have. You do not need to decide the engineering scope before sending the file.