Krynkl, off Shalesmoor, was due to open on Thursday. The four-floor development will eventually be home to a range of businesses, including restaurants and bars.
But the grand opening has been postponed to allow for the installation of a sprinkler system.
Tim Bottrill, of letting agent Fernie Greaves, said: “This came along at the last minute - none of us were expecting it.
“We ordered the sprinkler system about four weeks ago but the contractors have let us down.
“It will be installed on December 9, then we have the paperwork to do. We are looking at December 16 for the opening now.”
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