Toronto change-of-use permits

Do you need a permit to change a building's use in Toronto?

Toronto change-of-use permit guide explaining when a permit is required even without construction, with examples and official City source.

2 min readReviewed Oct 1, 2026

The short answerPermit likely required

Yes. Toronto says a change of use can require a building permit even when no construction is proposed.

Changing from one use to another can change code, occupancy and safety requirements. Toronto gives examples such as residential to office or a single dwelling unit house to a multi-dwelling unit house.

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Know what matters

What changes the answer.

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

Change of usePermit requiredConditional

Toronto states that changing a building's use requires a building permit even if no construction is proposed.

Official sourceCity of TorontoWhen Do I Need a Building Permit? · Permit-required and permit-exempt project examples

Verified2026-10-01Open proof

ZoningCheck proposed useInfo

The proposed use must also be reviewed against applicable zoning and other law.

Official sourceCity of TorontoZoning By-law 569-2013 · Office consolidation with City-wide amendments through April 30, 2026

Verified2026-09-29Open proof

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Description of existing and proposed use
Existing floor plans
Proposed layout if changing
Code or occupancy information as required
Other applicable-law documents

Fees and timing

TimelineResolve use and zoning questions before signing leases or starting fit-out work, because a use change can trigger review even without construction.

FeesThe applicable permit and review fees depend on the change-of-use scope and any associated alterations.

Next steps

Document the current legal use
Define the proposed use precisely
Check zoning permissions
Confirm building-code and permit requirements before occupancy

A few questions you might have.

Do I need a permit if I am not renovating?

Yes, potentially. Toronto explicitly states that a change of use can require a building permit even when no construction is proposed.

Is changing a house into multiple units a change of use?

Toronto lists changing a single dwelling unit house to a multi-dwelling unit house as an example of a change of use requiring permit review.

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

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Application planning

How do you prepare a Toronto building permit application?

Define the actual work, check the applicable rules, choose the City guide for that scope and prepare its drawings, forms and fees. The submission route is stated in the project-specific guide.

4 min read

Costs & budgeting

What will your Toronto building permit cost?

The fee depends on the work category. In Toronto’s 2026 schedule, a residential deck permit is $214.79; selected area- and length-based categories use a rate and minimum. Use the calculator for one category, then build the rest of your project budget separately.

4 min read