If you want to erect some scaffolding outside your house on a public road or thoroughfare. You should go to your local Camra and obtain a scaffolding licence.
It looks like this :-
As you can see in this case it allows for a scaffolding to be erected on a road. The scaffolding measures Ten meters x 1 meter and is able to be in place for 60 days.
Not having a licence may result in a fine and no doubt a close look at what work you are doing on your property.