A Building Permit is your formal permission from the Township of Wellesley to begin construction, renovation, demolition, changes of use, and the installation, alteration, extension or repair of on-site sewage systems on your property.
Wellesley Building staff must review your plans to ensure that they comply with the Ontario Building Code and all other applicable law prior to the issuance of a Building Permit.
When is a Building Permit Required
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- construct a new building
- any addition to an existing building
- adding dormer(s) to existing roof
- structural alterations
- renovate, repair or add to a building
- demolish or remove all or a portion of a building
- change a building's use
- install, change, or remove partitions and load bearing walls
- make new openings for, or change the size of, doors and windows
- build a garage or balcony
- excavate a basement or construct a foundation
- install or modify heating, plumbing or air-conditioning systems
- install or reconstruct chimneys or fireplaces
- construct an accessory structure larger than 108 sq. ft. in area
- a deck more than 24" above ground
- a wood burning stove/fireplace installation
- a basement entrance
- a second suite
- adding a bedroom to the basement
- pending location, a retaining wall that is greater than 1m (3'-3") in height
- tent or group of tents that is more than 60 sq. m. (646 sq. ft.) in aggregate area, attached to a building or constructed within 3m (9'-10") of any structure
- swimming pools with a depth of 0.8m (31½") or greater (including temporary or inflatable); see also Fences
- solar panels
- septic system installation or alteration
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When is a Building Permit NOT Required
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- door and window replacements (within the existing opening, where no structural members are changed)
- fences unless installed around a swimming pool with a depth of 0.8m (31½") or greater (including temporary or inflatable); see also Fences
- 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
- removing a non-load bearing wall in a single, semi-detached or townhouse dwelling
- 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)
- deck not over 24" above grade at any point
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Documents Required for Building Permits
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How to fill out the Application for a Permit to Construct or Demolish
Agricultural Shed (No Animals)
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- Complete an Application for a Permit to Construct or Demolish
- Schedule 1 to be filled out by a qualified designer
- Site plan showing dimensions from property lines, septic tank and septic distribution pipes
- Footing / foundation / pier plan
- Floor plan(s)
- Roof plan / truss layout
- Cross section(s)
- Elevation views
- Structural framing details
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Barn - Addition / Barn - New Construction
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- Complete an Application for a Permit to Construct or Demolish
- Schedule 1 to be filled out by a qualified designer
- Complete a Minimum Distance Separation Calculation form (MDS II)
- Site plan showing dimensions from property lines, septic tank and septic distribution pipes
- Footing / foundation / pier plan
- Floor plan(s)
- Roof plan / truss layout
- Cross section(s)
- Elevation views
- Structural framing details
- Approval from the Ministry of Agricultural, Food and Rural Affairs
- Nutrient Management Strategy
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Manure Tank
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Silo
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Decks
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- Site Plan
- Framing
- Elevation
- Connections
- Checklist
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Detached Garage / Shed
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- Complete an Application for a Permit to Construct or Demolish
- Schedule 1 to be filled out by designer
- Lot grading plan completed by a surveyor or engineer (showing new garage / shed on the property)
- Foundation / footing / pier plan
- Floor plan(s)
- Cross-section
- Elevation views
- Garage / Shed Package
- Site plan
- Floor plan
- Wall section
- Floating slab
- Spans and materials
- Checklist
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House Addition
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- Complete an Application for a Permit to Construct or Demolish
- Schedule 1 to be filled out by a qualified designer
- Lot grading plan completed by a surveyor or engineer (showing new addition on the property)
- Footing / foundation plan
- Floor plan(s)
- Roof plan / truss layout
- Cross section(s)
- Elevation views of all affected building sides
- Structural framing details
- Foundation / floor plans and cross sections to include the adjacent structure
- If adding a bedroom, fixtures or more than 15% of existing house, a septic review will be required -See septic system checklist
- If adding more than 15% of existing house Heat loss / gain calculation, Ventilation HVAC Summary, and Schedule 1
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New House Construction
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- Complete an Application for a Permit to Construct or Demolish
- Schedule 1 to be filled out by a qualified designer
- Complete a Minimum Distance Separation Calculation form (MDS I) if proposed house is outside settlement areas
- Lot Grading plan completed by a surveyor or engineer
- Footing / foundation plan
- Floor plan(s)
- Roof plan / truss layout
- Cross section(s)
- Elevation views
- Structural framing details
- Heat loss / gain calculation, Ventilation HVAC Summary, and Schedule 1
- Energy efficiency form
- For the installation of any wood-burning appliance please ensure to include a detailed installation plan and the manufacturers installation instructions
- A Septic System review / permit will be required
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Pool - Above Ground
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- Complete an Application for a Permit to Construct or Demolish
- Site plan showing dimensions from property lines, septic tank and septic distribution pipes
- Size of the above pool
- Label type and height of fence and gates / guards to be constructed around the pool (existing fences should be noted on the survey); see also Fences
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Pool - In Ground
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Septic System
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Heritage Building
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- Special consideration is required for construction, alteration or demolition of a Heritage Building
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Entrance Permit
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- An Entrance Permit is required for the installation of a driveway or access to a property from a township right-of-way
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