Community Planning and Development manages On-Site Wastewater Treatment System (OWTS) Permitting (Septic Systems) for the County. You must obtain a valid Septic Permit to install or repair a septic system. To install or repair a septic system, you must be a licensed septic system contractor. Thinking about selling your home that has an OWTS (Septic System)? Lake County has a Transfer of Title program. This requires you to apply for a Transfer of Title Permit prior to selling your home to ensure the OWTS is in proper working order.