For 13 to be unlucky would require there to be some kind of cosmic intelligence that counts things that humans count and that also makes certain things happen on certain dates or in certain places according to whether the number 13 'is involved' or not (whatever 'is involved' might mean).
Although housing sales and starts have cooled to more typical levels the housing market remains strong and sound. Without the expansion of homeownership and the strength of our housing market our nation would not have the economic growth we are experiencing today.