Accessory Dwelling Unit Permit - Barrie, Ontario

Housing and Building Standards Ontario 3 Minutes Read · published May 24, 2026 Flag of Ontario

In Barrie, Ontario homeowners who want to add an Accessory Dwelling Unit (ADU) must satisfy both zoning and building requirements administered by City of Barrie planning and building services. This guide explains the typical steps to confirm zoning, prepare plans, submit a building permit application, meet inspection requirements and address common issues so your ADU is safe, legal and rentable where allowed. Contact the City of Barrie Planning and Building divisions early to confirm lot-specific rules and required documents.

Overview of ADU rules

Accessory Dwelling Units are governed by the City of Barrie zoning by-law and provincial building code requirements. Before a building permit can be issued you must confirm the property is in a zone that permits an ADU and that the proposed unit meets floor area, entrance, parking and fire-safety standards. Check the City of Barrie guidance pages for secondary suites and building permits for specific submission checklists[1][2].

Begin with a zoning compliance check to avoid wasted design costs.

Pre-application checklist

  • Provide a site plan showing lot lines, setbacks and parking.
  • Include floor plans and elevations stamped by a qualified designer where required.
  • Confirm zoning permissions and any required minor variances or official plan considerations.
  • Estimate permit and inspection fees using the City fee schedule.
  • Contact Building Services for pre-submission questions.

Penalties & Enforcement

Enforcement of ADU requirements is carried out by the City of Barrie Building Services and By-law Enforcement where zoning or use provisions are breached. Specific fines and escalation amounts are not consistently listed on a single summary page; consult the cited by-law and enforcement pages for details[3].

Operating an ADU without required permits can lead to enforcement orders and stop-work notices.
  • Monetary fines: not specified on the cited page; see the by-law and enforcement pages for particulars and schedules.[3]
  • Escalation: first, repeat and continuing offences procedure and ranges are not specified on the cited page.
  • Non-monetary sanctions: orders to comply, stop-work orders, revocation of permits and court proceedings may be used.
  • Enforcer: City of Barrie Building Services and By-law Enforcement; inspect or file complaints through official contacts listed below.
  • Appeals and reviews: appeal routes depend on the specific order or permit decision; time limits for appeals are not specified on the cited pages and should be confirmed with the issuing department.

Applications & Forms

The core submission is a Building Permit Application with required plans and schedules. The City publishes a building permit application form and a fee schedule on its Building Services pages; specific ADU checklist items may appear on the secondary suites or zoning guidance pages[2][1]. If no ADU-specific form is published, submit the standard building permit application with annotated plans.

Submit complete applications to Building Services to avoid processing delays.

Application steps

  • Confirm zoning and whether a minor variance or site-specific permission is required.
  • Prepare plans: site plan, floor plans, elevations and any required engineering.
  • Calculate fees and include payment or confirm fee estimate during submission.
  • Submit the building permit application to City of Barrie Building Services by the official method listed on the city site.
  • Arrange required inspections during construction and obtain final occupancy approval.

FAQ

Can I legally rent an ADU in Barrie?
Only if the unit complies with zoning and building code requirements and a building permit has been issued where required.
Do I always need a building permit for an ADU?
In most cases yes; changes that affect structural elements, fire separations or occupancy will require a permit—confirm with Building Services.
How long does permitting usually take?
Processing times vary based on application completeness and complexity; confirm current timelines with Building Services.

How-To

  1. Confirm zoning permission for an ADU and identify any required variances.
  2. Engage a designer to produce compliant floor plans and site plans.
  3. Complete the City of Barrie Building Permit Application and attach all required documents.
  4. Pay applicable fees and submit the application to Building Services.
  5. Complete required inspections and obtain final occupancy approval before renting.

Key Takeaways

  • Start with zoning to avoid redesigns.
  • Submit a complete building permit package for faster review.
  • Contact Building Services and By-law Enforcement for clarifications.

Help and Support / Resources

  1. [1] City of Barrie - Secondary Suites and Accessory Units
  2. [2] City of Barrie - Apply for a Building Permit
  3. [3] City of Barrie - Zoning By-law and documents

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