Block F at Upper Grayston Office Park is the first building to achieve a 6 Star – Green Star SA Office v1 – As built Rating in Gauteng. The office park is situated just off Greyston drive on Linden Cresent, and a stone throw away from the on/off ramp to the M1 Highway in the heart of Sandton, Block F has been lauded as demonstrating ‘World Leadership’ in the South African sustainability sphere.