But that is no reason to exclude additional costs from the outset. There are plenty of cases and statistics online that declare this as a myth.
That was not done either, neither by me nor by any other user in this thread.
I’ll break it down again:
1. wrong basis of calculation
-> not applicable to developers, except for upgrades and inventory.
2. incomplete calculation of incidental construction costs
-> incidental construction costs are the builder’s risk, see 1.
3. the surprising topic of earthworks
-> see 2.
4. inaccurate detailed planning of special equipment
-> that applies, keyword upgrades after contract conclusion (better sanitary fittings, more electrical installations, are probably the classics)
5. uncalculated price increases
-> see 1., might have some effect if floor coverings are not included or become more expensive (-> upgrades)
6. “you only build once!”
-> upgrades, although here it is rather about too large a volume, unnecessary basement, granny flat, etc., which is also excluded with a developer apartment
7. “a house without a walk-in shower is social housing”
-> upgrades
8. incorrect own contributions
-> practically impossible with developers, possibly with flooring and painting work, provided these are not also included
9. wrong calculation of own contributions
-> see 8
10. “we’ll do that later bit by bit!”
-> developer, property is handed over finished including parking spaces and usually also outdoor facilities. Own garden probably not available, unless it is the ground floor apartment
11. “we’ll pay that from our current salaries”
-> see 10
12. construction delay
-> yes, can also happen with developers, belongs as a buffer in the financing costs (commitment interest, possibly double rent)
13. including non-existent money
-> does not belong on the list "why it gets more expensive than expected" at all, but is a misjudgment of the available financial resources
