The construction industry can't maintain the level of growth it has experienced in recent years. However Ireland still has a severe infrastructural deficit. Traffic is a nightmare (we need better roads, trains etc) and most of these new housing estates need schools, shopping facilities, leisure centres. There is no need for that sector to collapse. If the housing slow down is mild and prolonged rather than a crash there is no reason why those resources can't be deployed elsewhere. If house prices moderate without a crash, hopefully we can maintain the current level of immigration (and find them jobs) soaking up the current high levels of supply in the housing market. That way our economy can continue to grow, and your wages can continue to rise - hopefully faster than house prices.
There was severe irrational exuberance in the market early this year as buyers convinced themselves that there would be an SSIA related boom (causing an SSIA related boom ;-) ). In reality SSIA savings had already been priced into the market. In recent years, those that could afford to keep their SSIAs, were allowed to borrow more, and those that couldn't ploughed their savings into their deposit. The recent correction is the market readjusting itself to it's new longterm Eurozone trend (i.e. the trend since 2000). We may have overshot with our upward correction for low interest rates also.
We have permenantly lower interest rates now. You are never again going to see interest rates at 20%, the old 2.5 or 3 times your salary guideline is long outdated. We have the highest female labour participation in Europe, we have the fastest growing economy in Europe. Focusing on median industrial wages of just over 30k misses the point. The average age of a first time buyer in most EU economies is early thirties. You tend earn more as you get older. Thus the median wage of those who purchase houses is likely to be significantly higher - you can double that salary too - thanks to our high female labour participation. Also consider that a large proportion of income is unsalaried - the small business men, the contractors, the cash-in-hand black economy, the investors - these people will also earn significantly more than the median industrial wage. Then factor in low interest rates, low personal taxes and interest rate relief. What you end up with is nominally high house prices. They are also here to stay. But cheer up ;-) providing our economy stays strong you'll be able to afford the repayments. The alternative, a crash, cheap housing but no jobs and crap wages is not an alternative at all.