The only nationally accredited land trust headquartered in Hillcrest, San Diego Habitat Conservancy manages conservation operations from 2900 Fourth Ave, Suite 200, in the 92103 ZIP code. Firms specializing in native-plant restoration and grading for preserve buffers, such as GroundLevel Landscape Architecture, work in the same ecological planning space the conservancy occupies. SDHC currently stewards 33 open space preserves totaling nearly 2,000 acres under the federal and California Endangered Species Acts and the county's Multiple Species Conservation Program. Environmental planning consultants like Akela Engineering & Consulting handle the biological assessments and compliance reports that parallel SDHC's preserve management. The conservancy's most complex engagements involve multi-parcel mitigation bank establishment and long-term adaptive management plans for threatened coastal sage scrub and vernal pool habitats.