Five people have been taken to hospital, including two with suspected spinal injuries, after a balcony collapsed in a coastal town north of Perth.

Ten people were on the balcony of the two-storey beach house in Lancelin on Sunday afternoon when the structure gave way.

Four ambulances were called to the town, 130 kilometres north of Perth.

Two people have suspected spinal injuries while a third person has a fractured leg.

Another two patients are being treated for shock.

It is not clear what caused the balcony to collapse.