Group objects feature (base game)

That is, group placed objects, so they are moved and copied together. For example, say the player is making a restaurant so has a lot of table-with-2-chairs sets, rather than having to manually pick and place however many copies of the chairs and tables they need, the table and chairs could be grouped to act as one unit in Buy mode and the player can clone that group. Pricing would be unchanged just a faster way to place them en masse.

Similarly, in Build mode, rooms could be grouped to act as a single unit for cloning or sharing to Gallery. A typical example is public toilets with separate mini rooms (cubicles) for each toilet, if the communal washing area (basins) could be grouped with the toilet rooms so then can easily be moved or duplicated as one.

A button or keyboard command (e.g. Ctrl+G group, Ctrl+Shift+G ungroup) could be used to toggle object grouping state.