Old version. 140 and 160% scaling.

Glad you liked my birdhouse!! I made a new model, probably still smaller than you like. Note the holes at the peak to add a string or wire to hang the bird house with.
@GregB_150936 The size doesn´t matter that much since I can scale it to perfect size. Maybe I try the new model too some day. First I will try to mount the current.
I think the original is small so I scaled it to 140%. Printed with PETG.
I added a negative part to the bottom. I guess I need to drill a hole to mount it outside. Thinking about a line with silicone that will mount the roof or maybe melting glue.
I like the look of this bird house. I revised the perch so it can be inserted from the inside and glued with superglue. I'm not very good with CAD software yet, but the sides need to be 1/8 lower under the roof for proper ventilation and at least one hole in the bottom for drainage. I know I'm asking for a lot, but while you are at it, could you add a couple of ridges on the underside of the roof? The ridges would ensure the roof stays put without glue and would make it easier to clean at the end of the season.
@OmegaTI Sorry for the late reply - did not see your post. I redid the entire birhouse with the changes you reqested, I reoriented the roof so no supports are needed. With this change you will need to print two copies of the roof and maybe glue them together at the peak. There is also a small hole at the top if you want to put wire through there to hang the birdhouse,
file printed just fine however no perch was on the file list so i made one real quick in fusion 360
@PhilipLlamas_455181 Ooops - forgot the perch! Uploaded now. Glad you liked the birdhouse.