• Overview
• Does my building project need ESDHD approval?
• How do I get an approval for a Building Addition?
• What do I need for new construction?

Requirements for Approval
The first step in determining if a code complying area exists on any lot is to have knowledge of the soils. The Health District or the homeowner may have reliable data that adequately describes the soils and the existing septic system. If not, then typically soil testing must occur. It is recommended that the homeowner then contract with a licensed septic system installer to conduct soil testing. This must be performed in the presence of the Sanitarian.

The next step is to submit design plans or an installers sketch demonstrating how the property can accommodate a code complying system. This should be submitted as part of the application for approval. A sketch or design plan will show in some detail the new or expanded system in its tested expansion area on the lot. In most instances, no upgrade of the system has to occur at the time of house addition, unless the addition results in a substantial increase in design flow, read below:

THE CODE REQUIRES EXPANSION OF THE SEWAGE DISPOSAL SYSTEM AT THE TIME OF THE HOUSE ADDITION WHEN THE ADDITION RESULTS IN MORE THAN A 50% INCREASE IN THE DESIGN FLOW

You should also be aware that on lots where soil conditions are considered marginal, the homeowner may have to consult with a professional engineer to determine a code complying area.

What happens if the lot cannot meet current Code?
Let's look at instances where the homeowner is unable to demonstrate a code complying area. This is done in two parts.

Part A Building Additions. If a code complying area cannot be demonstrated, building additions may still be approved if all 5 requirements below are met:

Building Conversions, Change of Use
In addition to proposals for additions, this regulation also pertains to building conversions or changes in use, such as winterizing a seasonal use residence, or making changes that allows the occupancy or design flow to increase. In theses instances, a code complying area must be demonstrated.

Lot division, line change or reduction
Lastly, this regulation also applies to situations when there is a net decrease in an existing lot’s size. For instance, if a single lot splits into two lots, both lots must demonstrate code complying areas. The newly created lot must also demonstrate a reserve area.

This information is intended to disperse general information. If you need clarification or more detail, you should discuss such with a Registered Sanitarian.

Information on B100
Summarizing the requirements of Section 19-13-B100a of the Connecticut Public Health Code
To view this code in it entirety go to: www.dph.state.ct.us/
Applications for additions and alterations are available at the Health District Office. They are commonly referred to as "B-100" applications.