Cheap Apartments For Rent In Walnut Creek Ca . Today's rental pricing for one bedroom apartments in walnut creek ranges from $1,450 to $6,838 with an average monthly rent of $2,805. The average voucher holder contributes $400 towards rent in walnut creek. 4,000 Applications For 58 Affordable Apartments In Walnut Creek Walnut Creek, CA Patch from patch.com Apartment rent in walnut creek has increased by 26.7% in the past year. The waymark offers studio to 3 bedroom apartments ranging in size from 502 to 1434 sq.ft. 1 bed, 600 sqft, $1,750, 1402 creekside dr apt 1, walnut creek, ca 94596.