building cost: attached vs detached

[John Arnold]

What's more expensive to build: detached or attached housing, all other things being equal?

[Garry Sorrells]

Attached.
Less foundation, fewer walls, fewer windows, roof requires less time to install, wast and water to unit can be less and the list goes on.

[John Arnold]

Attached.
Less foundation, fewer walls, fewer windows, roof requires less time to install, wast and water to unit can be less and the list goes on.

The question is which is more expensive, so I assume your answer is actually "detached".

[Garry Sorrells]

I was hoping you would make correlation.
Attached less expensive.
Detached more Expensive.

[John Arnold]

No counter-intuitive opinions?