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## Building Permit
**About building permits**A building permit is a document issued by the body responsible for enforcing Ontario's Building Code in your area. A building permit is necessary when you wish to construct, renovate, demolish or change the use of a building.
Building Code enforcement, including issuing building permits, is generally carried out by municipal building departments, although in the case of on-site sewage systems, enforcement in some areas is conducted by boards of health and conservation authorities.
**When you need a building permit**You must obtain a building permit before you:
* construct any new building over ten square meters in area or place another structure, such as a mobile home, on your property
* make renovations or repairs or add to a building
* change the use of a building
* excavate or construct a foundation
* construct a seasonal building
* undertake work regarding the installation, alteration, extension or repair of an on-site sewage system
* contact your municipality if you have any questions about when a building permit may be required.
* build a fence
**For more information on building permits click here**
* **2023 Building Code Updates - Sheds**
* **Required Drawings For Additions, Foundations, Renovations & Demolitions**
* **Building Permit Application**
* **Building Your Own Home In Ontario?**
* **Decks - When is a Permit Required?**
* **Detached Garage Shed Form**
* **Energy Efficiency Design Summary**
* **Fence By-Law**
* **Safety-At-Work Form**
* **You Need a Building Permit**
* Building Fees Update 2026 (By-law 1972-26)