Well, they have a good site for starters: https://littlefreelibrary.org/build/ https://littlefreelibrary.org/build/ We live in Southern California and even we

Well, they have a good site for starters: https://littlefreelibrary.org/build/ https://littlefreelibrary.org/build/ We live in Southern California and even we get rain. So using a plan is a good idea simply for the value that they've thought of things like eaves and sills. You need to commit to repainting every year or so, maintaining the caulk, etc. it's the details and maintenance that make it. Ours looks good years on. One in the area is starting to look janky because they were too fancy with their first paint job and now it is in the dire need of paint. Another is just collection of rotten plywood at this point.