These cute white flowers are Japanese Pieris ones. This evergreen shrub is often called as Lily of the Valley Shrub because, as you can easily understand from the picture, the flowers of this plant are very alike to the ones of Lily of the Valley. The flowers are fragrant and bloom in early spring. And this plant has evergreen beautiful foliage so this shrub is loved as yard plant even though Japanese Pieris is toxic plant.
You can see another post for Japanese Pieris here.