Zoning, building permits and septic rules in Auburn, Illinois

Auburn’s own rules

• Local zoningPresent

  Land inside Auburn city limits; the city has an adopted zoning ordinance (Appendix A) with districts

  • Lot divisions must conform to the bulk regulations of the zoning district

  “no single improved lot shall hereafter be divided into two or more lots and no portion of any improved lot shall be sold, unless all improved lots resulting from each such division or sale shall conform with all the applicable bulk regulations of the zoning district in which the property is located.”

• Zoning districtsPublished

  Zoning districts inside Auburn city: A Agricultural, R-1, R-2, R-3 residence, B-1, B-2 business (industrial I-1, I-2 referenced elsewhere)

  • Special permitted uses require a zoning variance
  • Dimensional tables not captured in the opened sections

  “special permitted uses requiring a zoning variance special permitted uses in the r-1 district are:”

• Subdividing landRegulated (with conditions)

  Subdivision of land inside Auburn city

  • Final plat approved by city council after city engineer certification of improvements
  • Completion bond may substitute for completed construction

  “a final plat for subdividing shall be approved by the city council only after receipt of a statement signed by the city engineer certifying that the plans and specifications for improvements described therein have been prepared by a registered professional engineer and that construction (unless a completion bond has been posted) conforms with the requirements”

• Building in a floodplainRequired

  Buildings in the floodplain (SFHA) inside Auburn city

  • Applies to new buildings, additions valued over $1,000 or 70 sq ft, substantial improvements, manufactured homes on new sites, and RVs on site over 180 days per year
  • Lowest floor must be at or above flood protection elevation (base flood plus 1 foot)

  value threshold: > 1000 USD (or seventy (70) square feet) · freeboard: 1 foot

  “all buildings located in the floodplain shall be protected from flood damage below the flood protection elevation. this building protection requirement applies to the following situations: (1) construction or placement of a new building or alteration or addition to an existing building valued at more than one thousand dollars ($1,000.00) or seventy (70) square feet.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Auburn or Sangamon County directly.

• Building permit — Building permits inside Auburn city
• Owner-builder exemption — Owner-builder inside Auburn city
• Building code adopted — Building code inside Auburn city
• Inspections — Building inspection inside Auburn city
• Certificate of occupancy — Certificate of occupancy inside Auburn city

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Off-grid gear

Going off-grid in Auburn means bringing your own water and power. The kit we’d start with:

• Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
• Power Bluetti Solar generators and home battery backup for living off the grid.
• Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
• Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.

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