Serving Northern Virgina / Washington DC Metro Area Customers Since 1987

Homeowner Services

If you are building on a new lot, building an addition or tearing down an old structure to build a new one, understanding your needs for an onsite sewage system is imperative to its success.

Let SES take you through the process from initial evaluation to completion including operating and maintaining your alternative onsite system annually.

During the design process we will be able to give you choices with costs as opposed to designing something that doesn't suit your needs or that you can't afford to install or operate after it's installed.

The cheapest systems in Virginia are usually not the best value as they cost more to operate on an annual basis or require major maintenance every 4 to 8 years.

Contact SES today to have all of your options explained to you and get expert guidance in your building choices.

SES Company


  • Virginia Onsite Wastewater Recycling Association
  • National Onsite Wastewater Recycling Association
  • Water Environment Federation
  • Virginia Association of Counties
  • Northern Virginia Building Industry Association
  • Design Build Institute of America
  • Better Business Bureau
  • Dulles Area Realtors Association
  • Prince William Regional Chamber of Commerce

Learn More

Responsible Management Entity

SES is one of only three businesses to be licensed as a Responsible Management Entity. Loudoun County Virginia was the first in the Nation to establish requirements for an RME based on EPA recommendations. SES manages several communities required to have an RME.

Learn More


  • Licensed Conventional & Alternative Onsite Soil Evaluators (AOSE)
  • Licensed Conventional and Alternative Onsite Sewage System Operators
  • Licensed Conventional and Alternative Onsite Sewage System Installers
  • NSF Certified Septic System Inspectors
  • Virginia Class A Contractors License
  • Environmental, Monitoring Well and SDS Endorsements
  • Licensed Sewage Handler
  • Licensed Wastewater Treatment Plant Operators
  • Licensed Water System Operators

Learn More