Hi everyone,

I’m planning a small eco-community project in Sweet Home 3D and would love to know if anyone has a pre-made template or knows where to find one. Here’s the layout I’m aiming for:

Sounds like a very interesting project and a first impression is that everything you asked is possible with Sweet Home 3D. But it raises so many questions to find or create what you are looking for that I barely know where to start. I'll start with a point-by-point of your initial questions.

6 Tiny Houses (each 6m × 7m, 2 floors, ~80m² living space).

6 identical houses?
Stone/concrete houses or wood skeleton houses?
Second floor a sloping roof or a flat roof on top of the second floor?
Doors and windows? Where, how many, what size?
Interior walls the same for all houses or do you consider adding interior walls as part of the customization?
No kitchen which is often part of a house base plan?

Creating such a basic house is trivial. I could create that in an hour if I know what you want.

1 Shared Community House (8m × 10m, with workshop/laundry + communal space).

Basically the same questions as for the tiny houses. An empty, undecorated building is simple and can be created in a very short time.

Vegetable Garden (12m × 15m) + shared terrace.

Again, in essence very simple. Some borders and textured floors. Decoration consists of adding vegetables, trees, bushes, flowers, etc. All of those can be downloaded as 3D models if they are not available yet in Sweet Home 3D.

Car-sharing Parking Spot (3m × 5m) + bike storage.

And again, very basic and simple. A few lines and a colored/textured floor for the parking spot (a few minutes work) and a simple bike shed are easy and fast to create. But how big, for how many bikes? Concrete walls or a wooden structure?

Preferred Format:

.sh3d (Sweet Home 3D native file) or compatible (e.g., .obj, .dae for individual structures).

Alternatively, a layout guide (coordinates, layers, or XML snippets) to recreate it efficiently.

You definitely need native .sh3d project files. Once a complete house is exported as a 3D model (.obj file) you can't change it and it is almost impossible to create an interior for it.
For the tiny houses cretae a project for an empty house. When done copy the .sh3d file under a new name and you can decorate that house. Rinse and repeat for the other five houses. If they can be identical including the interior decoration you only need one copy (always keep the empty original as a backup). Once you have the tiny houses you can export them as a 3D model or copy past them together in a full estate project.

Pretty much the same for the community building and other parts. Usually decorating and lighting takes the most time.
The help here on the forum is great, there are multiple examples where complete models, parts, and interiors are created to help out a member. Why not try it yourself? A basic house is very simple. In any case you have to give much more details before someone can create something for you.

To get you started here's your parking spot: ParkingSpot3x5.zip

(P.S. remove your double post, the one without my reply)