This is just my own feeling, not a statistical analysis, but I do rather think that by the stage I'm thinking "am I missing out on this" I've already missed out. Which is to say: that feeling of missing out is based on the past not the future. Nothing you can do about the past - and 29 and single is hardly the place to start thinking you've missed out anyway. So when running your analysis look to the future and forget the past, if you can.
As to the rest, I agree that the advice on this site is very USA-centric, where the tax situation is very different, where the investing situation can be very different, and where in most of the country building houses is a lot easier - more land availability and looser planning regulations - than in Europe, which can have a significant effect on future value.
I think you've done a good job of setting out the general conditions for investing and buying houses in Norway. What you haven't done is set out some crucial issues as to how they apply to you in particular -
1. Financial - how much of a deposit do you have, how big a mortgage are you thinking of getting, what is the interest rate and is it fixed, how big are the payments in relation to your income? If you run these figures at a level you are comfortable with, can you buy a house/condo that you would be happy to own for the rest of your life? (My experience is that selling a house is a stressful and uncertain activity, to be avoided if at all possible).
2. Employment. How secure is your current job, and is there a good selection of other desirable jobs in the same location should you want or need to move on? Or if you have to move for job reasons, would the house you buy rent out at a price that covers your costs on it?
3. Investing. How close are you to that $230k level at which the extra tax kicks in? Even if you are below that level, how many years before reinvesting dividends and compounding gets you there? (Also, I'm not quite clear whether the investment and house values are aggregated for tax purposes - if you have a $200k value house, do the extra taxes kick in with only $30k in investments or do you still get the whole $230k?) One thing I would say about the extra tax is that at 0.85% it's rather like having an expensive fund manager - not ideal, and preferably avoided, but not completely disastrous either.
Not to say that you need to give any of those answers here, just that they need to be added in to the decision-making process.