I can give you some figures for my unit. In a regional NSW city, 22 townhouses, November 2024. Quotes ranged from 13k to 16k. So, from about $1650 to $2000 per $1 million. Zero risk of flooding, but 40-year-old single story buildings of brick, weatherboard and glass construction.
Sorry, forgot to add that this was for a valuation of $7.9 million.