Awning Encroachment

The owner of the unit assumed permission as the other 3 owners did not reply to the email request for permission as it was supposingly to be an agenda’d item at the next meeting. There has been no previous discussion/presentation of the size or intended position of this awning. 

We were away for the weekend when the owner of the unit installed this large encased electric awning high up on the external wall just 6 bricks below our windows. 

The damage indicates the airspace between the double brick wall has been breached. The awning runs from our living room, across the kitchen and to the tub side of our bathroom besides covering a portion of the gas pipe leading into our unit. The gas pipe enters our unit well below the awning. We cannot confirm if the wet floor of the bathroom is damaged. The dishwasher & kitchen cupboards also conceal skirting. Our unit is wired with blue cable & the power points are in the skirting boards-wiring runs behind skirting boards. 

The owner of the unit below has been notified re: the visible damage. Requesting  photos to present to the installers. 

I am astounded the awning would be mounted so high and not below the gas pipe clearly entering our unit indicative of our floor space. 

I cannot fathom where to start rectifying the damage. Would this awning have to be repositioned below gas pipe and floor level?

I shutter to the thought of numerous  tradesmen to remove/ replace skirting boards, wiring checked, wall cracks repaired, painting surfaces,… a nightmare dealing with the owner/ Chairman of this small self managed Strata. The same owner who previously allowed/observed water to leak from a split flexible hose under our sink for 8 hours causing unnecessary extensive water damage to both apartments. 

Such disregard for the integrity of this 100 year old building and clearly to floor space of the unit above.

How do we go about this process of rectifying the damage?