The Esther Feldman and Community Conservation Solutions records document the work conducted by Esther Feldman and/or Community Conservation Solutions (CCS) from the 1980s through 2020. The collection focuses on two major subject areas: (i) ballot measures and campaigns creating public financing for park and conservation projects and (ii) land-based projects involving land acquisition, native habitat restoration, park creation, 'green' stormwater and urban runoff capture, planning projects, legislation, and community engagement. The initiatives documented in this collection created over three billion dollars in new public funds for parks, natural lands, rivers, recreation, and conservation purposes in Los Angeles County and in California. These projects also established a model for over 35 billion dollars in new conservation public finance for similar legislation and ballot measures in the West, especially in Oregon and Washington states, and throughout the United States, and led to permanent park funding through Los Angeles County's Measure A: Safe, Clean Neighborhood Parks, Open Space, Beaches, Rivers Protection, and Water Conservation Measure.

The collection includes correspondence, memoranda, campaign materials, accounting, reports, press clippings, videos, born-digital files, and ephemera associated with ballot measure campaigns and other land conservation efforts. The collection also contains slides, photographic prints, and posters, including comprehensive slide files of the Baldwin Hills, Baldwin Hills Scenic Overlook, the Baldwin Hills Park Plan, the Zev Yaroslavsky L.A. River Greenway Trail, and the Natural Park-Air Pollution Solution at the Ramona Gardens Housing Development.

The collection documents various projects that have shaped Los Angeles County's system of protected natural lands, rivers, park and recreation lands, and trails surrounding and interlaced within metropolitan areas. The material in the collection links goals relating to diversity, equity, and inclusion with permanent county park funding that prioritizes building parks in park-poor, low-income communities of color.