Do you plan on adding bedrooms, bathrooms, kitchens, or an apartment to your current system?
Most septic systems are designed as a three bedroom system and will prematurely fail if you add additional load to the system. Your town also requires you to obtain a new permit to add to your system.
Mainely Septics will work with your town and a soil scientist to obtain a new design to add to your system. Oftentimes, this entails adding an additional row of devices to your current system to help with the load.