PergolaRamadaGazeboOpen-sided Airy StructureMore Substantial StructureOpen airy structure, usually located for a particular view.No Solid roof but has various options for adding shadeSolid RoofSolid RoofFlat Top Usually PitchedPitchedNot RainproofRainproofRainproofAttached or freestandingAttached or freestandingFreestandingSquare or rectangularSquare or rectangularUsually Circular style with 5 - 8 sidesUsually, does not need planning permissionProbably Does need PermissionProbably Doesn't need Permission