Rainbow Building Walnut Hills Redevelopment Foundation > Rainbow BuildingRainbow Building The WHRF acquired the Rainbow Building (1528 - 1538 Madison Road) in 2016. The building consists of five small retail bays, and has a recognizable rainbow painted on the facade. The building is currently under construction. Development FactsDEVELOPER: WHRFLOCATION: 1528 - 1538 Madison RoadPROJECT COST: TBDUSES: CommercialCOMPLETION DATE: TBD