Purely anecdotal and probably only relevant to a few but there certainly seems to be a lack of availability of competent small building firms
to do extensions, renovations etc. here in Sweden and the situation seems to have persisted for quite a few years now with good builders having long waiting lists.
Even individual tradesmen can be hard to find. When we moved into our rental at the beginning of May the leaky kitchen tap needed replacing and the Landlord rang the plumber while I was with him and got a lead time of 6 weeks to do the job! I got the tap off him and fitted it myself. Some windows also needed to be repaired and the carpenter only turned up to do them in the last week of July.
I've no idea if things will continue like this long term and there is no pot of gold as a self employed tradesman will be paying about 50% (and up) in tax and social insurance but it might suit some people.