Rainbowish phenomenon outside my home
Sun dogs are bright spots to one or both sides of the sun. They are a form of halo created by ice crystals in the atmosphere.

What you saw was most likely cloud iridescence, which is a phenomenon that occurs closed to either the moon of the sun. The iridescence is caused by diffraction created by water droplets or small ice crystals individually scattering light. Large crystals produce a halo, not iridescence.