I will try to summarize what I have read.
In my opinion, there are several factors that play a role in making a decision for or against a basement:
- Land prices (the more you pay per square meter, the more the additional costs for the basement are relativized - ergo: the higher the land price, the more sense "vertical" building makes)
- Soil condition/soil moisture (here the costs can possibly explode (white tank, etc.))
- Slope location - can possibly create additional living space from the basement - in particular you have to include the slope in the planning anyway (note: different regulations apply for a residential basement than for a utility basement)
- Use of basement rooms 1 - those who have a specific use for the rooms (office/sauna/fitness) and actually implement it accordingly in the end (not just going into the fitness room once a month) can benefit from a basement
- Use of basement rooms 2 - a workshop or similar always brings noise and dirt. If you want something like that, you outsource it (e.g. behind the garage) or move it to the basement - however, here too a regular use applies rather than the "one-time" turning of screws.
- Storage options are, in my opinion, only secondary - sure you have a lot of space but over time you might also clutter it up (I have the space, so I don’t have to dispose of it) - but if I actually have space for it, I can store things like wheels, bicycles, ski equipment or even canned goods (greetings ), etc. there
So far my list of decision factors.
Looking at this, the following reasons result for me regarding our decision against a basement:
- Land price - ambitious, but would not have been decisive
- Soil condition - we would have needed a white tank
- Slope location - yes, but we had a 50/50 plot and built on the flat part - saved us the costs for excavation + disposal/deposit fees
- Use of basement rooms 1 - office/guest room is upstairs, sauna not planned, fitness would be nice (but how often would I actually use it?)
- Use of basement rooms 2 - workshop - I am, was and will never be a big tinkerer (that also fits my career choice )
- Storage options - certainly it would be nice if, but here the cost/benefit ratio would no longer fit. Once we have the garden shed, this problem should be solved. I mostly move such storage to the attic now. Only the 40 euros per year per car storage fee for tires bothers me a bit - but I no longer have to lug the tires around for the change (my back thanks me)