When roof extensions go bad

Londoners are to be given automatic planning permission to add roof extensions to their properties as long as other properties in the area have done so:

 

roof

Source:

http://www.dailymail.co.uk/news/article-2418937/Lofty-conversion-Tycoon-ordered-pull-villas-built-poles-roof-factory-China.html

And this is what happens when it goes REALLY bad (yes, there is an apartment there):

int_beijing_roof_14viii13