Translation:It is an ugly building.
So all animals are not ugly, but buildings are? Double standards!
Well, Belgium IS famous for it ugly houses: http://uglybelgianhouses.tumblr.com/ ; I doubt Dutch or Belgian animals are as notorious.
Is lelijk pronounced right?
Yes, -lijk at the end of a word sounds close to -luk.
So you have an even better idea: it is pronounced lélek (tu as fais du français, tu comprends ce que j'ai écris normalement :) )
Why not "It is a ugly building"? ("a" not "an")
Wow. Well now I know. Cheers :)