Whatever you construct on your property - needs plans, unless it is defined as "minor building work". Even so the Act states very well that any structural building work that is defined as "minor building work" requires approval by your local authority's building control officer before you can commence with any work . As long as you make an application to get the proper approval, you DO NOT NEED PLANS. But the law is also very clear in terms of compliance with the regulations; minor building work must adhere to the regulations. Temporary Buildings Short-term structures also need permission from the local authority. This includes builders' sheds, on-site toilets, and any other structure you may want to build (or be obliged to erect) for the building project. Info you need to supply: