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Crikey!!

That is REALLY impressive. And it helps a lot.

(A minor point but actually the back rooms are lower than the front rooms, not vice versa).

However my only issue now is that the roof on the back rooms has (therefore) to be lower than the roof on the front room, and I am not sure how to selectively lower that section of the roof only...

Concerning the split level.

You will still need to create 2 buildings, where the ground floor of both buildings are at the same level. It appears that the ceiling height of the rear room of the ground floor is higher than the front rooms, giving you the need for a higher floor level of the 1st floor. The reason you will need 2 buildings is to allow to set two different floor to ceiling heights.




To achieve the above I created a second building and transferred the rear parts to the new layer. So there was no need to redraw anything, just right click and select Move to layer.. When you transfer the relevant parts, just raise the floor ceiling height accordingly. There is no need to adjust the roof.

Note: Where you just want to raise the floor section of a room, see Stepped floor

Thank you for these two tips.

The tip concerning the split staircase is most helpful.

However, (unless I have missed something), the tip concerning split levels does not solve my problem. As far as I can tell from the video, (and from trying it myself), you can only add new levels that start above (or below) the main floor, and end up at the same ceiling level. Whereas in my case the extension room starts at the same level as the main floor, and ends up at a lower ceiling level than the main ceiling. It is not clear from the video if that is possible,

There is a tutorial video showing you how to create a building with split levels.

See Split Level Video

If this is a split staircase that you are describing, then this can be achieved by creating the single staircase with the stair designer an then creating any additional stairs that you need to add to that staircase as separate 3d models.

Create a separate 3 step stair case and save this as a model which you can import and add to your main project.

The above image shows a normal staircase with an additional side staircase model added. Using this method you can create comlex / comprehensive split staircases, which you can save as 3d models to reuse again.

If you still have problem, then email your project with correct floor heights / split levels and I will show how to add stairs using additional stair models

I have two questions concerning how to model a house having different levels. The house is a classic English terrace house built in 1913, where the front rooms have a greater ceiling height than the back rooms. See attached floorplan.

My two questions are:

1) How do I model this split level in Visual Building? I suspect you may say that I need to model it as two separate buildings with different ceiling heights, but in that case, how do I model the roof so it all joins up?

2) How do I model the staircase? The main flight is 11 steps up to a landing, from which there are three steps up to the front bedrooms, and two steps up to the back rooms.