Property Alteration and Addition Permits

Property alteration and/or addition projects on properties with a septic system or well must be reviewed and approved by the Lake County Health Department. Construction must meet horizontal separation distances from the septic tank, septic field (primary and reserve areas) and water well. See Appendix D for a table of separation distances.

 Projects include, but are not limited to:

  • Small house additions (less than 50% square footage addition, no change in the number of bedrooms)
  • Basement remodeling or additions
  • Decks and patios
  • Retaining walls
  • Sidewalks
  • Sheds
  • Garages (attached or detached)
  • Driveways
  • Sports courts
  • Gazebos
  • Swimming pools
  • Fences
  • Site grading or filling
  • Installing drainage and water conveyance pipes

Applying for a Permit

Plans may be reviewed at the time of submission (counter review). Plans may also require file and records research (submittal based).

The Health Department may review your request with other county departments as needed. The Health Department requires the following documents be submitted for review:

  • Three copies of a plat of survey or site plan drawn to scale. This must show the proposed project construction and all existing buildings, driveways, parking areas, well, and components of the septic system (tanks and seepage field). A plan of the septic system layout on file with the Health Department may be used. If a drawing is not available or unclear, then one must be made by a licensed Lake County septic system contractor.
  • If the project is an addition or change to a floor plan to an existing structure three copies of the existing and proposed floor plans are needed. Closets must be included. Floor plans must be drawn to scale. Rooms of the floor plans must be labeled. Architectural plans may be needed. An increase in the number of bedrooms (by code definition) and/or a greater than 50% increase in square footage requires that the septic system meets current code.
  • Completed Property Alteration/Addition application from the Health Department.
  • Payment per the Lake County Health Department Environmental Health Fees Schedule and other applicable County Department fees.

If you live in unincorporated Lake County, please visit the Lake County Planning, Building, and Development website for other permits and approvals you may need. 

If you live in a municipality, please visit their website for their requirements.