The building violations  data will be filtered to include Building/Use type only, in particular illegal conversion of non residential buildings/units to residential without obtaining approval from the New York City Department of Buildings (excluding illegal vehicle storage, for example). For more information regarding illegal conversion: nyc.gov
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For this analysis several data sources.
311
Data o f311 is huge due to this fact I extract only two months (Jan for winter and June for summer) to assessed the overall number of complaints per zipcode
311 complaints were selected over DOB complaints / violations data due to constrains.... having it vague / whatever
Data were filtered to include only Building related complaints prior downloading.Data were filtered to include 2016 complaints only prior downloading.Descriptors included: