Do you consider a house a normal NECESSITY good or normal LUXURY good? I am trying to write my performance assessment about income and price elasticities of demand but I have a hard time figuring out if a house is a normal necessity good or a normal luxury good.

Everyone needs a house, however, no one needs a mansion. So which is it, is a house a normal necessity good or a normal luxury good?
I would expect necessity goods to have an income elasticity between 0 and 1 in keeping with Engel's Law, which was originally observed for food (an obvious necessity good).

Housing indeed exhibits this feature because poorer households spend a larger fraction of their income on housing. That makes housing look like a necessity good. E.g.,



(source: http://www.lao.ca.gov/reports/2015/finance/housing-costs/housing-costs.aspx)