You will need this approval if you intend to construct, extend or alter a public building. A public building means any building or part of a building where persons may assemble for civic, theatrical, social, political or religious, educational, recreational, sporting, and business purposes.
It can also include any building, structure, tent, gallery enclosure or platform or any part of a building, structure, tent, gallery, enclosure or platform in or on which numbers of persons are usually or occasionally assembled, but does not include a hospital.
You may also need to notify the provider of water services in the area of your intention to build and provide them with a copy of the proposed plans.