Rennie house (19 AM) is an old landmark building on the watershed of Johannesburg with amazing apartments on the top four floors, 9 levels of office space and a bit of retail on ground floor. As part of the renovation GASS is upgrading and replacing all the base building systems to accommodate higher density floor plates and to give the building a new extended life expectancy. 

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The renovation also includes 380 additional parking bays constructed over a newly extended retail area and enlarged lobby space. The norther façade is articulated with new artist boxes extended on a seemingly random pattern from the façade allowing for inter-floor connections and additional floor area.