The Building Services Department in Gillies Township is the body responsible for enforcing Ontario's Building Code in the municipality. They are responsible for permits for construction, renovation, septic, demolition and certain changes of use of buildings.

Building permits allow the municipality to protect the interests of both individuals and the community.  By reviewing building plans before any work is done, the municipality can ensure that buildings comply with the Ontario Building Code, conservation authorities, and the local planning and zoning by-laws.  

Who do I contact for septic field and leaching bed installations, permits and inspections?
For all septic field and leaching bed installations, permits and inspections contact the Thunder Bay District Health Unit at (807) 625-5900.
 Who do I contact for electrical permits?
For all electrical permits and required inspections contact the Electrical Safety Authority at 1-877-372-7233.
 When do I need an inspection for building and plumbing?
The person to whom a building permit is issued shall notify the Chief Building Inspector and request an inspection at the following stages of construction:

Building Inspection

  • Readiness to construct footings.
  • Substantial completion of the reinforcing in the ICF formwork prior to pouring concrete
  • Substantial completion of footings and foundations prior to the commencement of backfilling
  • Substantial completion of soil gas barrier/reinforcing prior to basement floor or slab on grade pour.
  • Substantial completion of structural framing and ductwork and piping for heating and air conditioning for Residential Buildings
  • Substantial completion of insulation
  • Substantial completion of vapour/air barriers
  • Substantial completion of all required fire separations and closures and all fire protection systems required in multi-residential buildings
  • Rough-in of solid fuel fired appliances and chimneys (fireplaces, woodstoves, etc.)


Plumbing Inspection

  • Substantial completion of the sewage system before the commencement of backfilling including soil gas piping
  • Substantial completion of plumbing not located in a structure, prior to backfilling
  • Readiness and testing of:
    • building sewers and building drains
    • water service pipes
    • drainage systems and venting systems
    • the water distribution system, and
    • plumbing fixtures and plumbing appliances
    • heating systems – Hydronic and Geothermal


Request an inspection through the inspection page.

Fees and Charges
The list of fees and charges will be updated and added to this section shortly. Please contact the municipality in the interim for a copy.
Drawing requirements

Two copies of drawings are required for all permit applications:

 House Construction

  • site plan
  • cross section(s)
  • elevation views
  • structural framing details
  • footing/foundation plan
  • floor plans
  • roof plan for complex designs
  • survey/drainage and grading plan
  • for the installation of any wood-burning appliance please ensure to include a detailed installation plan and the manufacturers installation instructions.
  • heat loss/gain calculation and ventilation HVAC summary

 House Additions

  • all requirements noted for a house, as well as a full and complete site plan for the entire lot
  • foundation/floor plans and cross sections to include the adjacent structure
  • elevation views of all affected building sides

 Detached garages and sheds

  • full and complete site plan for the entire lot
  • foundation/ footing and pier plan
  • floor plan
  • cross-section
  • elevation views


  • full and complete site plan for the entire lot
  • foundation/ footing and pier plan
  • deck framing plan
  • guard and handrail details

What requires a permit?

  • Adding a bedroom to the basement
  • Adding dormer to existing roof
  • Additions to a building
  • Attached garage, carport, shed or other roof structures
  • Backflow prevention device
  • Basement or main floor walkouts
  • Creating a duplex (a.k.a. in-law suite, accessory apartment, granny flat)
  • Decks greater the 24 inches in height, plus decks less than 24 inches in height that have a hand railing
  • Demolition of a structure greater than 108 square feet in building area
  • Detached garage, shed or accessory structure 108 square feet and greater (measured to the outside face of exterior walls)
  • Finishing the basement of a house
  • Industrial, commercial, institutional and multi-residential construction or alterations or changes of use
  • Installing a new window or door - when increasing the width of the existing opening
  • New residential dwellings
  • Plumbing fixtures added or relocated
  • Re-insulating walls, ceilings or floors
  • Removing a load bearing wall, column, lintel or beam
  • Renovation or converting an existing building (change of use)
  • Site servicing (water or sewer lines) for all building types
  • Solar Panels that are mounted to a building
  • Woodstove or wood burning fireplace

If you are unsure if you require a permit, contact the municipality.

What does not require a building permit

  • Decks less than 24 inches do not require a permit unless it is attached to a house
  • Door and window replacements (within the existing opening, where no structural members are changed)
  • Installing a gas fireplace
  • Installing new shingles on existing roof
  • Installing a water softener
  • Painting, wall papering, tiling, carpeting, cabinets, countertops, and similar finish work
  • Replacing a plumbing fixture (i.e. toilet, bathtub or sink) with a new fixture in the same location
  • Structure less than 108 square feet measured from the outside face of walls (that does not contain plumbing or a second floor) 
    • Accessory buildings must conform with the Zoning by-law regardless of building size

If you are unsure if you require a permit, contact the municipality.