As the building owner, you are ultimately responsible for complying with all building requirements. Failure to obtain building permits can result in costly construction delays, legal action and/or the removal of work already completed.
The following is a list of common projects that require a building permit. The list is not exhaustive. If you have any questions please contact Grimsby's Building Division.
- Construct a new building
- Construct an addition to an existing building, such as
- second or third story additions
- attached garages, carports
- sunrooms
- solariums, porches, decks
- Make structural or material alterations, such as
- adding or removing walls (i.e., changing room sizes and/or uses)
- new windows or doors where there were none before
- enlarging or relocating existing windows or doors
- enclosing an existing deck, porch or patio of any size
- Construct a shed with an area of 15 square meters (161 square feet) or more.
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- Note: Sheds under 15 square metres in area, do not need a building permit. See “When is a Building Permit not required?” below for exceptions to this rule
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- Construct an accessory structure larger than 10 square meters (107 square feet) in area, such as
- Detached Garage
- Workshop
- Carport
- Pool house or cabana
- *Note: If you are constructing an accessory structure and it is attached to an existing building and/or has plumbing, regardless of its size, a building permit is required.
- Finishing a basement, if the work proposed includes any of the following,
- structural or material alterations
- installing or modifying heating and or plumbing systems
- excavating and/or constructing foundations
- basement underpinning
- constructing a basement entrance
- adding a second suite
- Energy and environmental building improvements, such as
- roof top storm water retention systems
- green roofs
- structures used in the support of a wind turbine generator with a rated output of more than 3kW
- solar projects such as installation of solar collector systems and solar hot water systems
- Construct a deck more than 60 centimetres (24 inches) above ground
- Construct a retaining wall more than one metre (3 feet 3 inches) in height provided the retaining wall is on or adjacent to public property (including streets), building entrances, and on private property accessible to the public
- Constructing a tent that
- covers more than 60 metres squared (646 square feet); and/or
- is attached to a building; and/or
- is within 3 metres (9 feet 10 inches) from another structure.
- Demolish or remove all, or a portion of a building
- Install or reconstruct a chimney or fireplace
- Install a wood burning stove or fireplace
- Install or modify heating and or plumbing systems
- Install a backwater valve
- Install a backflow prevention device
- Change a building’s use (i.e. from residential to office or single dwelling unit house to multi-dwelling unit house). Even if no construction is proposed, if a change of use is proposed a building permit is required.