BuildRules/Uxbridge/Basement apartment / secondary suite

Uxbridge project guide

Do you need a permit for a secondary suite in Uxbridge?

Check Uxbridge secondary-suite requirements for zoning, building permits and two-unit-house registration.

2 min readLast verified Oct 2, 2026
The short answerConditional

Yes. Uxbridge requires a building permit for a secondary suite and requires the two-unit house to be registered.

The Township recommends confirming first whether a second unit is allowed on the property, then using the building-permit process to demonstrate Building Code and other applicable-law compliance.

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BUILDRULES / UXBRIDGE

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Uxbridge / Basement apartment / secondary suite

Yes. Uxbridge requires a building permit for a secondary suite and requires the two-unit house to be registered.

Township of Uxbridge · BuildRules reviewed 2026-10-02

Know what matters

Know what applies to your project.

Check the conditions below before you finalize the scope. Every answer connects to an official source.

Property eligibilityConfirm zoning firstConditional

Uxbridge directs owners to Development Services to confirm whether a second unit can be added to the property.

Source · Township of Uxbridge

Secondary Suites · Secondary-suite zoning, building permit and registration

Verified Oct 2, 2026Open official source
Building permitRequiredConditional

The Township requires a building permit to add a secondary unit.

Source · Township of Uxbridge

Secondary Suites · Secondary-suite zoning, building permit and registration

Verified Oct 2, 2026Open official source
RegistrationRequiredConditional

Secondary suites must be registered as two-unit houses with the Township.

Source · Township of Uxbridge

Secondary Suites · Secondary-suite zoning, building permit and registration

Verified Oct 2, 2026Open official source

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Preparation checklist · Reviewed 2026-10-02

Open the focused permit checklist

Plan ahead

Fees and timing

TimelineConfirm the current municipal review timeline after a complete application is accepted.
FeesConfirm the current Uxbridge fee schedule for the exact permit class before filing.

From reading to doing

Your next steps.

  1. Confirm property eligibility
  2. Prepare the suite design
  3. Apply for the building permit
  4. Complete required inspections
  5. Register the two-unit house

Trace the evidence

Official sources behind this guide.

These are the source documents linked in the rules above. Check the municipal authority for current requirements before submitting a project.

  • Township of Uxbridge

    Secondary Suites · Secondary-suite zoning, building permit and registration

    Source verified Oct 2, 2026

A little more clarity

Common questions.

Do you need a permit for a secondary suite in Uxbridge?

Yes. Uxbridge requires a building permit for a secondary suite and requires the two-unit house to be registered.

What should I prepare for secondary suite in Uxbridge?

Start with Building permit application; Existing and proposed plans; Required life-safety and service details; Two-unit-house registration form. Confirm the final submission requirements with Uxbridge for the actual scope.

What should I do before starting this project in Uxbridge?

Confirm property eligibility. Prepare the suite design. Apply for the building permit. Complete required inspections. Register the two-unit house.

Know the approval terms

A second unit can meet one rule and still need another approval.

Building permits, zoning and applicable law are separate parts of the approval path.

Building permit

A municipal approval required before certain construction, alteration, demolition or change-of-use work can proceed. The permit review checks the proposed work against the Ontario Building Code, local zoning and other applicable law.

Zoning by-law

A municipal rule set that controls how land and buildings may be used and developed, including matters such as permitted uses, setbacks, height, lot coverage and other site-specific standards.

Applicable law

Requirements outside the Ontario Building Code that must be satisfied before a building permit can be issued when the Building Code identifies them as applicable law.

Same project, different city

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01 Permit and local-rule guidance02 Documents to prepare03 Questions still to verify
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A provider match is not guaranteed. Municipal approval stays with the City.

A provider match is not guaranteed. Municipal approval stays with the City.