Markham project guide

What do you need for a secondary suite in Markham?

Check Markham secondary-suite requirements for permit applications, zoning, drawings, registration and Fire Services review.

1 min readReviewed Oct 1, 2026

The short answerConditional

Markham provides a dedicated secondary-suite process covering eligibility, the building permit application and registration with Markham Fire and Emergency Services.

A secondary suite can be in the basement or another part of the house. It is a distinct permit and registration workflow, not simply a finished-basement project.

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Know what matters

What changes the answer.

Start with these conditions. The official reference is attached to each one.

PermitDedicated building permit routeConditional

Markham’s homeowner guidance explains how to apply for a permit to build a secondary suite.

Official sourceCity of MarkhamGuide to Building Permits · Secondary suites, required forms and documentation

Verified2026-10-01Open proof

LocationCan be in the basement or elsewhere in the houseInfo

The City notes that a secondary suite can be located in any part of the house, including a basement or above a garage.

Official sourceCity of MarkhamGuide to Building Permits · Secondary suites, required forms and documentation

Verified2026-10-01Open proof

RegistrationPart of the City processInfo

Markham’s guide outlines registration with Markham Fire and Emergency Services.

Official sourceCity of MarkhamGuide to Building Permits · Secondary suites, required forms and documentation

Verified2026-10-01Open proof

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Building permit application where required by the submission method
Permit Applicant Authorization when applicable
Applicable Law Checklist
Schedule 1 Designer Information
Energy, plumbing and other project-specific forms

Fees and timing

TimelineConfirm the current municipal review stream after the application is accepted as complete.

FeesConfirm the current Markham fee schedule for the exact permit class.

Next steps

Confirm the property and suite configuration
Review the City’s secondary-suite criteria
Prepare the drawings and permit package
Complete the registration and inspection steps

Same project, different city

See how this rule changes across Ontario.

Compare the source-reviewed answer for this project across every municipality BuildRules currently covers.

Compare secondary suite rules by city

Better decisions, together

Get everyone on the same page.

Send this to your designer or contractor before agreeing on the scope.

Paid research brief

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Turn the published rules, documents, timing and questions to verify into one project-specific preparation brief.

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See what’s included

Research guidance only. Municipal approval and professional design are separate.

A little help with the next step

Move your secondary suite forward.

Tell us what kind of help you need. We’ll save the request with your project and municipality so a relevant provider can respond if a match is available.

BuildRules principle

Do not confuse “no permit” with “no rules.”

Zoning, overlays, safety rules and other constraints can still apply.

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