So I've never done anything like this before, and I played it by ear. I researched birdhouse motels online to get some ideas and basic measurements and then opened up my giant Ziploc bag of scrapwood. I found two nice size rectangle pieces and cut the side pieces to fit. For the roof, I cut strips of wood to fit and laid them across. Here's a pic to show the unfinished, unshingled product:
I made the holes first with a thumbtack and then widened them with my pointy clay tool (can't remember what it's called!).
Once that glue dried, I painted the entire thing with Tim Holtz "Picket Fence" Crackle Paint (which I love!!!) to give it that weathered, outdoor look.
You can see two of the little treats I bought for myself in the background - a log filled with mushrooms and a tiny brass mailbox. :) I also bought a trellis with lovely plants which I attached to the side of the shop. I also plant to fill some window boxes with handmade roses (from a kit I bought today!).