Building more is definitely the wrong solution to housing. Just remove the capitalist vampire landlords making a profit on basic human needs, and let everybody enjoy free housing for life!
EDIT: Corrected stat.
EDIT2: Funny to see people downvoting without argument. Are you all against Article 25 of the Universal Declaration of Human Rights, stating "Everyone has the right to a standard of living adequate for the health and well-being of himself and of his family, including food, clothing, housing and medical care and necessary social services" ?