Hello property chat crew! Hoping you have some words of advice...I'm looking at buying a Californian bungalow in Melbourne's west Brunswick and adding a two storey addition at the rear ( preserving the heritage-protected facade and front rooms). In addition to the property purchase price, I have a reno budget of about $500k. My question is, who can I consult to find out if this is a realistic figure BEFORE making an offer on the house. ( BTW, the building inspection report found nothing unusual, given the age of the building). Would design/build companies provide a rough cost estimate pre-purchase? Many advertise free quotes - but that's for a property you already own, not sure same would apply for something this speculative....any tips you may have much appreciated!