Does a lot need to be at least one-half acre in size to meet the design standards for the installation of a new septic system?
• No. While there are no minimum lot size requirements in Title 124 for the installation of an onsite wastewater treatment system, it may be difficult or not possible to site a standard septic system on a lot that is smaller than one-half acre due to soils, setbacks, and other site conditions. Regardless of lot size, all septic systems must meet specific standards with respect to system design and setbacks to surface water, drinking water wells, water lines, property lines and foundations. • Note: Some local jurisdictions may have requirements that include lot size limits or more restrictive requirements.