This would be one of those housing that was built for the old soldiers and their families, no?
Yes, Those are called "眷村", literally means "Family village", They are villages built for National Revolutionary Army (ROC army at the time) soldiers' family, Each village usually has different families that are the people from the same Chinese provinces.
My grandfather and father used to live in one of those
Updated
Kaohsiung CityZuǒyíng District, Lane 71
Zuǒyíng is the location of Taiwan's largest naval base
Luck
Inverted "luck" character, a typical New Years' decoration