Any accessory building (such as a gazebo, garage, sun shelter) over 10 square metres (108 square feet) in size will require a building permit.
A shed up to 15 m2 (161 square feet) does not require a permit, provided that the shed,
(a) is not more than one storey in building height,
(b) is not attached to a building or any other structure,
(c) is used only for storage purposes ancillary to a principal building on the lot, and
(d) does not have plumbing.
The construction of an accessory building, regardless of size, must comply with the Zoning By-Law.
View the Accessory Building Guide below for frequently asked questions, zoning, foundations, framing, overhead door lintels, rafters and trusses, and more information.
For more information on Building Permits including fees, inspections, applications, and FAQs refer to the General Building Permit Information page. Applications and inquiries can be submitted to building@sarnia.ca or 519-332-0330 Ext. 3301.