It's nice to put names to familiar though blurry faces.
I think this is Claire and Clio - the Heller sisters.
Here in their early twenties living with mum and dad, Charles and Cecelia, at 741 W. 11th Street in 1930. They were living there when the pictures were taken.
rescarta.lapl.org
Dad Charles maybe had a thing about moving buildings. He had one moved himself in 1923.
http://ladbsdoc.lacity.org