For certain work on or around your premises you need an environmental permit. For example, if you want to rebuild, demolish or install an alarm system.
If you are organizing a party or event in your catering establishment, you may wish to adjust the opening hours for this purpose for once. You then apply for an exemption.
You may not simply place advertising on or attached to a building. If you want to place an advertising sign on a building, you need to apply for an environmental permit.