Welcome to Collinson, Oliff & Associates, Inc.

Land Surveying

Whether you are searching for property corners or a detailed map of your site, COA’s experienced Land Surveying Department can help you find what you need. Learn more.

Civil Engineering

As businesses, churches, communities and industries continue to grow, it becomes essential for their sites to grow with them.
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Land Planning

As Maryland’s terrain is made up of some of the most diverse geographic features in the country, it becomes evident how important land planning is.
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Environmental Planning

Increasing government restrictions have created the demand for an in-depth environmental analysis factoring in more than meets the eye.
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Established in 1990, Collinson, Oliff & Associates, Inc. (COA) brings over 25 years of experience in the fields of Land Surveying, Civil Engineering, Land Planning and Environmental Planning to Southern Maryland. Call us at 410-535-3101 or 301-855-1599 to learn more.

Core Capabilities





Partners & Affiliates