What is the cost of engineering for a septic system?
A. Design cost can vary just as installation of the system. 1. It is necessary to have a topographic survey. 2. Have a backhoe dig two (min.) test pits 12 feet deep (min). 3. Have a site evaluator and the County Inspector witness the test pits. 4. Have engineer design and submit it to the County for approval. (This takes on average six weeks, and the cost could range from $1500.00 to $3000.00 depending on complexity of your design and the engineer.