Building Permit Drawings in Mississauga: ePlans, Zoning Review, and City Comments

Short answer: building permit drawings in Mississauga must show the existing conditions, proposed work, zoning information and construction details needed for the City to review the project. The package also has to be organized for Mississauga’s ePlans process. A technically complete design can still be delayed at pre-screen if sheets, forms or digital files are missing, inconsistent or uploaded incorrectly.

Mississauga does not use one universal drawing checklist for every project. A deck, basement apartment, home addition, load-bearing wall alteration and commercial renovation each require information suited to that scope. The purpose of a coordinated package is to let the assigned reviewers understand what exists, what will change and how the proposed construction addresses the applicable requirements.

This guide explains the general path from early zoning review through ePlans upload, department review and responses to City comments. It is not a substitute for the City’s current project-specific requirements. Confirm the correct application type and supporting documents for the property before submitting.

Define the Project and Check Zoning

Permit preparation should begin with an accurate scope of work. The application description, drawings and supporting documents should all describe the same project. For example, an interior renovation may also involve a new exterior opening, plumbing relocation or structural work. If those connected items are omitted from the early scope, the drawing set may need substantial revision during review.

The City directs applicants to confirm that a permit is required and check the property’s zoning before applying. Mississauga’s Zoning By-law regulates the use of land, buildings and structures. Depending on the project, it can affect permitted use, setbacks, lot coverage, building height, floor area, parking, accessory structures and the location of additions or exterior stairs.

Start with property-specific information

Useful early information may include:

• the municipal address, legal description and current property survey;
• the existing building layout, use and permit history;
• the applicable zone, general provisions and site-specific exceptions;
• existing and proposed setbacks, height, lot coverage and parking;
• heritage, conservation authority, tree, grading or servicing constraints where relevant; and
• any separate approval that must be obtained before a building permit can be issued.

Mississauga’s property information tool can identify items such as the zoning designation, legal description, permit history, development applications and heritage status. The City cautions that online property information should not be treated as a legal opinion or proof that an existing condition complies. The applicable by-law text, amendments and property-specific facts still need to be reviewed.

The City’s consolidated Zoning By-law is updated regularly, but its own page notes that recently passed or appealed amendments may not yet be fully reflected. That is one reason to verify the current provisions before finalizing the layout. A design should not rely only on a zoning label or an old drawing set.

Permit Works’ Mississauga building permit services can help identify the likely submission path and organize the property information before the permit drawings are finalized.

Coordinate the Required Drawings

The drawing package should match the project type and explain enough detail for the assigned reviewers. For many residential renovations or additions, the set may include a site plan, existing and proposed floor plans, elevations, sections, construction details and structural information. Commercial and larger projects may also require code matrices, exiting information, accessibility details, mechanical or plumbing drawings, fire-protection information and other consultant material.

The City publishes separate drawing and document requirements for common permit types. Those project-specific lists should control the submission. The following elements are common, but they are not required in identical form for every application:

• Site information: property lines, existing and proposed structures, dimensions, setbacks, easements, grades and zoning statistics where applicable.
• Existing-condition plans: the current layout and construction affected by the proposed work.
• Proposed floor plans: dimensions, room uses, doors, windows, stairs, fixtures, wall construction and structural elements.
• Elevations and sections: exterior changes, height, grades, floor levels and assemblies that cannot be understood from plan view alone.
• Construction details: foundations, floors, walls, roofs, insulation, guards, connections, fire separations and other scope-specific assemblies.
• Supporting disciplines: structural, mechanical, plumbing, civil, grading, servicing or other information where the project requires it.

Consistency matters across every sheet

A drawing package can contain every expected sheet and still generate comments if the sheets disagree. The site plan footprint should match the proposed floor plans. A new opening should appear on the plan and the correct elevation. Beams, posts and bearing points should coordinate with the architectural layout. Revisions to one discipline should be checked against all other affected documents.

The title blocks, project description and revision information should also remain consistent. Drawings need clear scales, dimensions, labels and identification of existing versus proposed work. Supporting calculations and forms should use the same project address and scope.

Coordinated building permit drawings help bring these parts into one review package. Permit Works’ guide to site plans, floor plans, elevations and sections explains the role of the main drawing types, while Mississauga’s own requirements determine the files needed for a specific application.

Prepare the ePlans Submission

Mississauga requires building permit applications to be submitted online through ePlans. The applicant first creates an account and submits the permit request with the requested information and administration fee. The City then sends a temporary project number and an upload task for the drawings and supporting documents.

The temporary project number is not yet the formal building permit application number. After the upload, the City conducts a pre-screen to confirm that minimum submission requirements have been met. If corrections are required, the applicant must complete them before the request can proceed. Once the submission passes pre-screen and the required fees are paid, the City creates the application and issues the formal application number.

Build the digital requirements into the drawing workflow

Mississauga’s published ePlans standards state that building permit drawings are uploaded as PDF files, with each drawing sheet provided as an individual file. The standards also call for landscape orientation, greyscale output, unsecured files and a simple file name that matches the drawing number and title in the sheet’s title block. Multi-sheet drawing PDFs are not accepted under those standards.

Before completing the upload task, check that:

• the correct permit request and project-specific checklist have been used;
• every required drawing and supporting document is present;
• each sheet is a separate, readable PDF with the correct orientation;
• file names follow the City’s current naming requirements;
• PDFs are not password-protected or otherwise secured;
• forms are complete and signed where required;
• the uploaded files contain no obsolete or duplicate versions; and
• the application description matches the scope shown in the drawings.

Applicants cannot add information or respond to comments while the submission is in pre-screen review. If the City issues pre-screen corrections, use that task to correct the package rather than treating the comments as the detailed technical review. A successful pre-screen means the application can move forward; it does not mean the design has already been approved for zoning or Building Code compliance.

Permit application support can help organize the upload set and keep the permit request, forms, drawings and supporting documents aligned. The City remains responsible for acceptance, review and issuance.

Respond to City Comments

After the formal application is created, Mississauga sends it to the relevant review groups. Depending on the project, these may include Building, Mechanical, Zoning, Fire and other disciplines. Each assigned group marks its review as approved or withheld. The permit is not ready for issuance until all required reviewers have approved.

The Workflow Project Status Report in ePlans shows reviewer status and outstanding comments. The City instructs applicants to wait until all reviewers have completed their review before uploading a response. When the review cycle is complete, the City sends an Applicant Resubmit task for the revised or additional information.

Coordinate the resubmission before uploading

A reliable comment-response process is to:

1. download the complete Project Status Report and organize every comment by discipline;
2. identify comments that affect more than one drawing, form or consultant document;
3. revise all affected sheets so plans, elevations, sections, details and calculations remain consistent;
4. prepare a short response explaining how and where each comment was addressed;
5. check the revised package against the original project scope and current City instructions;
6. use the Applicant Resubmit task only after the review cycle is complete; and
7. retain a clear record of the submitted version for construction and later review.

One zoning dimension or structural comment can affect several sheets. Correcting only the marked page may leave another contradiction in the set. City comment response support is intended to coordinate those revisions and prepare a clearer resubmission, not to guarantee that the next review cycle will be approved.

When every assigned review group approves, the City advises the applicant that the permit and approved drawings are available through ePlans. The permit notice and approved documents should remain available on site, and construction should follow the issued set. The required inspections depend on the project. If the design changes during construction, confirm the correct revision process before building work that differs from the approved drawings.

If you are preparing a Mississauga renovation, addition, basement, deck or commercial project, Permit Works can help identify the drawing and submission requirements for the proposed scope. Book a consultation before the application package is finalized.

Official Sources

• City of Mississauga: Building Permit Application Process
• City of Mississauga: Building Permit Application Status
• City of Mississauga: ePlans Submission Standards
• City of Mississauga: When a Building Permit Is Required
• City of Mississauga: Zoning By-law
• City of Mississauga: Find Property Information

Related Articles and Permit Services

• Mississauga Building Permit Services
• Building Permit Drawings
• Permit Application Support
• City Comment Response
• Site Plan, Floor Plan, Elevation, or Section?
• Why a Contractor's Sketch May Not Be Enough
• Contact Permit Works

Important Notice

This article is provided for general informational purposes only and is not a substitute for project-specific professional or municipal advice. Building Code, zoning, permit, and inspection requirements vary by property, project scope, and municipality and may change over time. Information that was accurate when published may be outdated when you read it. Before making design or construction decisions, confirm current requirements with the applicable municipality and consult a qualified professional where appropriate.