HELIX Environmental Planning, Inc. (HELIX) is an employee-owned, environmental consulting firm established in 1991 and with offices in San Diego, Los Angeles, Orange, Riverside, Sacramento, and Placer counties and the Bay Area. The firm has extensive experience helping clients comply with local, state, and federal environmental laws and regulations; manage natural and cultural resources; and design and construct sustainable projects. HELIX’s in-house services include CEQA/NEPA compliance, biological studies, cultural resource management, paleontological studies, architectural history, environmental compliance and mitigation monitoring, regulatory permitting, habitat restoration, landscape architecture, and air quality/greenhouse gas and noise studies.HELIX has extensive experience helping public and private clients comply with environmental laws and regulations, manage natural and cultural resources, and design and construct sustainable projects. Our responsive, high-quality service enables clients to achieve their goals while benefiting the community and the environment. Many clients, as a measure of their confidence, bring their largest, most sensitive, and controversial projects to HELIX.