No - they are temporary buildings thus do not need planning permission.
It has been known for a Court to order the removal and destruction of a greenhouse.
Well they were growing Cannabis!
A very good question,
i have done some investigation on this very subject, although Planning regulation are NOT generally required as they are classed as removeable structures. but in the following situations planning permission is required or must be sort from you council planning department. these are a follow
You live in a conservation area whereby a town and country planning requirements
stipulates permission must be sort.
A structure is being erected by means of a brick skirting wall which being erected against or too an existing building eg house. which would be classed or considered to be a extension to a property.
You intend to run a greenhouse for commercial use from a residential property.