Olson & DeTilla Associates

Land Surveying Engineering Land Planning

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Olson & DeTilla Associates

Olson & DeTilla Associates is a land surveying, engineering, and land planning firm engaging in a fairly wide variety of projects primarily related to commercial, industrial and residential land development. As such, we are able to meet a wide range of your project needs. 

Olson & DeTilla Associates and its predecessor Olson Surveying Service, have been meeting the needs of many clients in Southern California for over 50 years. While our territory includes Santa Barbara, Ventura, San Bernardino, Riverside, Orange and San Diego Counties, as well as a new office coming to San Luis Obispo County, we find ourselves most active in the southeast portion of Los Angeles County.


We look forward to working with you.


 Contact Us


Please browse our site and give us a call for more information on how we may assist you in meeting your land surveying, engineering and land planning needs.





Olson & DeTilla Associates
Southern California (Main):
Fax: (562)803-4064
12733 Bellflower Blvd.
Downey, CA 90242


Central Coast (Coming soon - call for info):

Phone: (805)489-2114

1284 Old Oak Park Rd.

Arroyo Grande, CA 93420