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Hamilton, Ontario / Project checklist

Additional dwelling unit permit checklist

Use a project-specific additional dwelling unit permit checklist for Hamilton, Ontario: documents, next steps, source review date and official references.

Focused project answerReviewed Oct 1, 2026
Use this before you submit

5 items to prepare for this project.

This checklist is generated only when BuildRules has enough project-specific documentation and source context to make a separate page useful.

Project template

Your preparation checklist

Use it as a working list. The final submission still needs to match your actual scope and the City’s current requirements.

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Preparation checklist · Reviewed 2026-10-01

What to do next

  1. Confirm the intended number and location of units
  2. Check zoning and addressing requirements
  3. Prepare the ADU permit drawings
  4. Submit to the City and complete required inspections

Official sources behind this page

Internal ADUBuilding permit required

Hamilton lists adding internal additional dwelling units among permit-required interior work.

Official sourceCity of HamiltonBuilding Permit Application Requirements · Residential permit-required projects and exemptions
Verified2026-10-01Open proof
Dedicated reviewADU permit team

Hamilton states that a dedicated ADU team reviews and issues permits for existing single-family dwellings including internal units.

Official sourceCity of HamiltonAdditional Dwelling Units · Internal and detached ADU permit program
Verified2026-10-01Open proof
Unit typeCan be internal, added or detached

The City defines an ADU as a separate self-contained unit located on the property of the principal dwelling.

Official sourceCity of HamiltonAdditional Dwelling Units · Internal and detached ADU permit program
Verified2026-10-01Open proof

Need the full project answer?

The main guide keeps the permit trigger, zoning questions, documents, fees, timing and next steps together.

Open the additional dwelling unit guide