A friend here at work is adding an extension to an old 1930's californian bungalow in Willoughby Sydney on a 560m² block. They are adding a family room at the back and a couple of rooms on top of this. They wanted a good job to be done, in a similar style to the old bungalow. The 5 quotes ranged from $700K to $1000K. They accepted a quote in the middle of that range and are half way through and looks like it will blow out over 1 mill. This is what you would expect in Sydney for something like this.