1351 Jefferson Street, Suite 301, Washington, MO 63090  Main Office: 636.283.0621

Bringing Together a range of expertise unequalled in civil engineering

21 Design Group is committed to providing quality engineering and consulting to our clients at a reasonable cost. Our staff is motivated to provide you with the most extensive service for your bottom dollar.

The interaction between our engineers, and designers broadens our perspective of complex projects and provides our team the depth of expertise to identify critical engineering constraints early in the project and to create innovative solutions. We provide engineering services throughout all phases of a project and we seek to incorporate the benefits of natural systems into our designs.

Welcome to 21 Design Group

Through the use of state-of-the-art technology, an expert staff, and precise planning and mapping, we deliver and execute engineering, surveying, and design projects with desired results.

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potable water

Our firm has extensive experience in all aspects of potable water design including storage, distribution, and supply.


surveying and mapping

We have the most up to date equipment and software available allowing us to provide the best mapping to our clientele.


civil site design

With experience across much of the midwest, our staff has the expertise to provide the right civil site design to every individual project.


construction support

Our firm can be present for any aspect of construction necessary to provide quality control.


wastewater treatment And Conveyance

Due to ever-changing technology, our staff strives to sustain the most current wastewater treatment and wastwater collection knowledge to keep our clients in compliance.


Infrastructure efficiency studies

Our knowledge in engineering allows us to analyze your infrastructure and provide recommendations that fix your problems rather than delay them.

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