The patch notes incorrectly stated housing chests could be upgraded to 75 spaces with in game gold and 225 with mithril coins. The correct numbers are as follows:
Personal housing storage can be upgraded to 60 with in game currency and up to 120 with mithril.
Kinships housing storage can be upgraded to 90 with in game currency and up to 180 with mithril.
The notes have been updated to correct the error.