As I was looking for houses in Italy, where I had just moved, I realised that the filters used by the online listing websites were really limited. I had to do some scraping alone and did some analyses to find interesting areas and worthwhile property.
Soon enough, I realised I could create a website out of this, and share my analyses with other people that might have the same problems I had. I iterated the idea with around 4-5 of my brightest friends. After this I started to build the product in the end of September.