The former council headquarters, which included a 14-storey tower, was demolished in 2014 after nearly four decades as a landmark in the city centre.
Roddy will showcase his photographic exhibition on the demolition of the former building on Broad Street at an exhibition next month.
Roddy, who graduated in sculpture from Gray's School of Art, said he was inspired to create his exhibition, St Nicholas House in Memoriam, after taking an interest in another Aberdeen landmark - Union Terrace Gardens.
The former art teacher said he started taking photos of the gardens due to the fear they may be raised under previous plans before moving on to St Nicholas House.
Roddy, 73, said he felt it was "such a pity" to see the building flattened.
"I had always thought it was quite elegant and a good example of mid-20th Century modernism. I thought it was light, airy and all the things that this new building isn't."
Roddy said he was also drawn to the contrast between the styles of St Nicholas House compared to Provost Skene's House.