But what sort of building would he put up for his project?

He moved away from the street, put his back against the wall of a building.

Looks like part of a building but you can't see which one.

The office was on the street level of a small building.

The performance space is on the 12th floor of a building.

The woman led him around the side of the building.

The pay phone was on the side of the building.

Then they led her around to the back of the building.

And, even more important, how could I get them out of the building?

They were right at the front of the building now.