The conversion to the new version of BBR (new structure and new methods) in June 2017 implied in connection with the publication of 3rd quarter 2017 and 1st quarter 2018 big revisions of all the time series in the construction statistics. For the statistical recording of permitted and in particular started construction work is there however a considerable uncertainty about the figures for the latest, ongoing 1½ year. It is expected, that there later will come significant upward adjustments.