Civil Engineering

Our Engineering staff will help manage your project from the conceptual stage, through the permitting process, and finally to completion.

We provide the following Professional Engineering services:

  • Septic System Design and Permits
  • Alternate Treatment Unit (ATU) Septic System Design
  • Pinelands Septic System Design
  • Select Fill Testing
  • Soil Erosion and Sediment Control Plans
  • Grading Plans


Johnson Design Associates, Inc. has extensive experience in dealing with the New Jersey Pinelands Commission and the New Jersey Department of Environmental Protection. We can act as an Agent for our client and manage the entire application process beginning to end for any residential Pineland or Wetlands permits.

Soil Testing

Johnson Design Associates, Inc. has a fully equipped soils lab on site with respect to testing for the permeability of a given soil, including grain size analysis, percolation rate, and hydrometer testing. We also provide sieve testing for various applications depending on the needs of our clients which include other engineering firms, septic installers, building contractors, local health departments and single-family homeowners.

Next Steps…

If you are ready to begin your project, or if you have some questions before you get started, please contact us!

Get Started