We were offered a plot of land in a roughly 10-year-old new development area. There is a shell building (ground floor without ceiling) on a slab foundation. I think the building is about 8 years old.
What kind of costs should one roughly expect if the house construction company (prefabricated house) takes care of the demolition and disposes of the debris?
So you want to have the unfinished building demolished by the provider of a timber frame panel "prefabricated" house down to the top edge of the basement ceiling and then rebuild?
Besides , we also already have a thread from someone who absolutely wanted to continue building on a slab: - in this case, however, it was already planned for a residential house (whose plans he did not want to continue using); furthermore, several threads from (who had acquired a plot on which a wooden house had burned down except for the basement) as well as with a bungalow on a ten-year-abandoned basement and and also recently an inherited prefabricated house, of which only the basement is to be given a second life - so you are in very good company and have enough reading material for the silly season.
In your place, I would also get hold of the permit file for the existing house torso and carefully examine how it can be built upon or extended. Show everything you have here; there is plenty of creativity available!