The four A's
100

This term refers to the physical condition and livability of a unit of housing. 

What is adequacy?

200

This term refers to the median housing cost in relation to household income. 

What is affordability?

300

This threshold is considered the maximum % of income that can be spent on housing before it is no longer considered affordable.

What is 30%?
400

5 single family units, and 3 multi-family units is an example of this kind of metric.

What is housing availability?

500

Racial discrimination is a type of barrier in this kind of metric.

What is accessibility?