Here are a few photos of my duck's raised pen. I just got them in it this week. They had previously been living in the chicken house. I still need to paint and shingle the actual house section.
Mine have a covered secure night pen with a big dog igloo in it. I got the dog igloo at a garage sale for only $25. During the day they have a big aviary to play in. They used to free range in the back yard, but a hawk found them so no more of that.
We just moved my ducks & the 4 geese into our GIANT chicken house that was uilt last year. the chickens got sick and it's been sitting empty for over a year because i was too scared to put them back in it!