Contact Us

HELIX Environmental Planning has an excellent reputation earned through creative problem-solving, commitment to our clients, high-quality work products, and tailored solutions. Please contact us for more information. For general inquiries, please use the online form below, or contact our headquarters location so we can direct you to the appropriate person. For press inquiries and teaming opportunities, please contact Tiffany Thomson, Marketing & Communications Director at 619-462-1515 or We look forward to working with you!




San Diego County Office (Headquarters)

7578 El Cajon Boulevard
La Mesa, CA 91942
Phone 619-462-1515
Fax 619-462-0552

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HELIX North County San Diego Office Building

North San Diego County Office
701 Palomar Airport Road, Suite 120
Carlsbad, CA 92011
Phone 760-517-9060
Fax 619-462-0552

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HELIX LA County Office Building in Pasadena

Los Angeles County Office

135 W. Green Street, Suite 100
Pasadena, CA 91105
Phone 626-463-0060

Fax 619-462-0552

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HELIX Sacramento County Office Building

Sacramento County Office

1180 Iron Point Road, Suite 130
Folsom, CA 95630
Phone 916-435-1205

Fax 619-462-0552

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Placer County Office

1677 Eureka Road, Suite 100
Roseville, CA 95661
Phone 916-435-1202
Fax 619-462-0552

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Orange County Office

16485 Laguna Canyon Road, Suite 150
Irvine, CA 92618
Phone 949-573-9450
Fax 619-462-0552

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HELIX Riverside County office building


Riverside County Office

1504 Columbia Avenue, Suite 8
Riverside, CA 92507
Phone 442-287-5400
Fax 619-462-0552

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General Inquiry Form

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