The 1e version only had a duration of about an hour (6 turns, or 60 minutes), and had a 10' diameter (5' radius) -- as well as taking 3 turns to cast.

The version above is accurate for 2e / 3e version, although they made the 3e bigger and last longer.

None of the 1/2/3e version offered any defensive capabilities.

I never saw the 4e version, so can't speak to it, but the 5e is the first one to include defensive capabilities.

Additionally, earlier versions never had a floor.

In 2e, they introduced Leomund's Secure Shelter. This was a 4th level spell that created an actual building -- a cottage, and was treated as a stone building. It had one door, two windows, and was a single room with a fireplace.

 It came with an unseen servant, an alarm spell on the doors and windows, and was pretty much exactly what is described in the suggestion from DrJawa, lol.

(side note -- imo, spells were much, much cooler in older editions)

Quote from AEDorsay >>

I never saw the 4e version, so can't speak to it, but the 5e is the first one to include defensive capabilities.

 The 4e version was only ever published in Dragon magazine. It was a ritual (similar to 5e rituals) with an 8 hour duration and a 20' radius (which may have been an editing error), and otherwise identical to 3.5e.