How long do you cut/bulk for?

Not sure which section this belongs in, but here goes -
 
I've been training now for about six months, gone from 72kg to 81kg. Now I can tell that I've put on some muscle, but also some of my trousers are getting a little difficult to fasten as well.
 
I'd like if possible to carry on adding muscle, but if possible not any more fat, is it doable?
 
 

answer 'yes' fella of course its a do-able,but your gonna have to do your research to fully understand how,just use MT search button for LEAN BULKING mate,read the diet/nutrition/training articles here on MT and good luck searching for the holy grail.
myself i'm a 32 waist but have to buy 36" to get my arse and legs in.

Been bulking for a year, took a month off in the middle.
 
Plan to cut for up to 16weeks.