SQL 2012 :: String Splitting Using Like And Data Cleansing

I have a large poorly designed table (inherited) With a Name field that contains comma delimited text containing address information. I need to do several things with it but unfortunately there doesn't appear to be any true consistency in it. When it displays in its own text box it works by placing each section on a new Line and looks ok.But I need to pull it apart and place things like unit number, Building Name in its own column etc. In the data it could be in either the 2nd,3rd, 4th, dependent on what came 1st. the data looks some thing like the following

unitNumber/StreetNumber Space StreetName (Building Name), Subub,City,Country

Some addresses won't have unit number or Suburb or country so when splitting you could have Suburbs and Citys in multiple columns even if you try and stagger the split process.Has any body go a good tool or reference site for dealing for this sort of problem. I have a table that I have made up that has some of the street names that could be used for comparing against existing records but it is by no means fool proof due to spelling inconsistencies . I also have another list of Common building names that could be used to compare, remove and place in the new building column.