A new community hub containing Swansea's central library and other council services is set to take shape at the city's former BHS building.
The authority's planning committee unanimously approved the Oxford Street project, which will feature translucent cladding, at a meeting on January 18.
Planning officers had recommended it for approval after considering, among other things, whether the loss of ground floor retail space would have a significant impact on the vitality of the area.
