Apply for a building permit before you start your next project in the Municipality of Trent Hills. Building permits allow you to build, add to or renovate a building. They ensure everyone's safety and that your project follows our by-laws and the Ontario Building Code.

Apply for a building permit

Complete a Permit to Construct or Demolish Application to apply. A Septic Permit Application might also be required if you're installing, replacing or repairing a septic system.

When do I need a building permit?

Contact us if you're not sure if you need a permit. It is a violation under the Building Code Act to build without a permit.

You must get a permit if you are:

  • Making material alterations
  • Adding or repairing a building
  • Constructing any new building or structure
  • Installing new plumbing
  • Installing a fireplace or woodstove
  • Demolishing part or all of a building
  • Renovating or converting an existing building
  • Installing any type of swimming pool

Building permit exceptions

You don't need a building permit for the following:

  • Replacing an existing door or window
  • Installing siding on small residential buildings
  • Building a building under 108 square feet (must conform to the zoning setbacks)
  • Fixing a roof without any structural work
  • Installing eaves troughs, if drainage is contained on your property
  • Making your basement damp proof
  • Painting or decorating, including interior finishes, but excluding insulation
  • Reinstalling kitchen or bathroom cupboards without plumbing
  • Erecting a fence


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