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Dirt Construction Site

Who We Are

A & O Engineering

We are a locally owned and operated civil engineering firm specializing in residential, commercial, and industrial projects. A & O Engineering was founded in 2011 and we are licensed to provide engineering services as well as site development consulting in Oregon, Washington, Arizona and Idaho. 

With more than thirty years of engineering experience, we approach every project big and small with the same expertise while offering the personal touch of a small business. 

Learn About Our Services

What We Offer

A & O Engineering processes land use applications for tentative and final partitions, subdivisions, site reviews, planned unit developments, and cluster subdivisions. We also process environmental applications including DEQ NPDES permits. Our firm has experience dealing with complex sites that require 1200c permits and wetland mitigation calcs. Additionally, A & O Engineering provides detail engineering documents for public improvements, private building permits, step backwater analysis DEQ 1200c permits, and complete engineering analyses for wetland JPA fill permits. our projects vary from multi building campuses to stormwater design for an individual home.

A & O Engineering is experienced in working with all levels of government (local, state, and federal) to obtain land use approvals and permits. The development, planning, and permitting process can be challenging and expensive but A & O has navigated these phases many times and can guide your project on the most efficient and economical path possible while maintaining one point of contact during the complex development approval process.

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Residential Projects

Commercial Projects

Industrial Projects


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