I quite liked this building, which is described by "Eyewitness Travel Hungary" as "Built in 1972, the four-storey buildings form a series of interlinking white towers, all leaning slightly forwards and topped with steep brown roofs -- a modern interpretation of Árpád tents." More information on Makovecz can be found here http://www.makovecz.hu/main.html (look under Most Important Projects)
LATER NOTE: There seems to be some question as to whether or not this apartment building was designed by Makovecz. Two out of three tourbooks attribute it to him, but a book on organic architecture does not. I suspect it wasn't his, although he did design part of the accompanying complex. Need to do more research before I write anything definitive.
Thanks to Isabel and William, who both helped me with trying to get rid of an obnoxious wire in the sky. For some reason what I was doing wasn't working. Hopefully now it's gone, more or less!