I pre assume that an area with a very low number of residential permits issued over a year (meaning, an area that is less developing / renewing) will also have a relatively large number of building violation (illegal conversion). I also guess there are highly renewing areas with large number of permits issued and a large number of building violation complaints. 
Additionally, I am interested in assessing the roll of income in predicting housing violations. The questions for 
  1. How does Residential Permits Issuance correlates with building violations?
  2. How do building violation complaints correlate with actual building violation?