Zoning, building permits and septic rules in Anna, Illinois

Anna’s own rules

• Local zoningPresent (with conditions)

  Land inside Anna city's corporate limits. Anna city adopts and administers its own zoning code (chapter 40).

  • The code also divides the contiguous area within 1.5 miles of the corporate limits; that area is outside city limits and is not answered by this claim.
  • The compilation carries the stamp [october, 2025]; that stamp is a revision date, not an effective date.

  zoning districts: 7 districts

  “the city and the contiguous area within one and one-half (1 ½) miles thereof are divided into seven (7) zoning districts as follows”

• Zoning districtsPublished

  Zoning districts inside Anna city's corporate limits

  • The map is referenced as part of the code; the map image itself was not opened in this run.
  • The district list covers the city and the 1.5-mile contiguous area; only in-city land is answered here.

  districts listed in code: R-1, R-2, R-3, B-1, B-2, M-1, A-1

  “the boundaries of the zoning districts are established on a map entitled "zoning district map, city of anna, illinois," which accompanies and is a part of this code.”

• Minimum dwelling sizeSpecified

  Dwellings in the R-1 one-family residence district (section 40-2-12) inside Anna city

  • Subject to the modifications of article iv of chapter 40.
  • The floor-area minimum still applies to lots platted before the code even where the lot-area minimum does not.

  minimum floor area: >= 1200 square feet

  “(d) lateral dimension regulations. the following minimum requirements shall be observed, subject to the modification of article iv: (1) lot area 10,000 square feet (2) frontage 80 feet (3) front yard depth 35 feet (4) side yard width 20 feet total, minimum 7 feet one side (5) rear yard depth 40 feet (6) floor area 1,200 square feet (7) maximum lot coverage 20 percent”

• Minimum lot sizeSpecified

  New lots and uses in the R-1 one-family residence district (section 40-2-12) inside Anna city

  • Subject to the modifications of article iv of chapter 40.
  • The minimum lot square-foot requirement does not apply to lots platted and in existence in the R-1, R-2 and R-3 districts on the effective date of the code, as the code states; the floor area requirement still applies.

  minimum lot area: >= 10000 square feet (lots platted and in existence on the code's effective date are exempt from the square-foot minimum) · minimum frontage: >= 80 feet

  “(d) lateral dimension regulations. the following minimum requirements shall be observed, subject to the modification of article iv: (1) lot area 10,000 square feet (2) frontage 80 feet (3) front yard depth 35 feet (4) side yard width 20 feet total, minimum 7 feet one side (5) rear yard depth 40 feet (6) floor area 1,200 square feet (7) maximum lot coverage 20 percent”

  One more reviewed finding on this topic

  • Specified — Single-family residence on land in the A-1 agricultural district (section 40-2-20) inside Anna city

    “single-family residence, provided that any such residence must be situated on a lot of not less than two and one-half (2 ½) acres in area and complies with the provisions of article iii.”

• SetbacksSpecified

  Principal structures in the R-1 one-family residence district (section 40-2-12) inside Anna city

  • Subject to the modifications of article iv of chapter 40.
  • Section 40-2-1 applies the district rules to the city; the 1.5-mile contiguous area is not covered by this claim.

  front yard depth: >= 35 feet · side yard width: >= 20 feet (20 feet total, minimum 7 feet on one side) · rear yard depth: >= 40 feet

  “(3) front yard depth 35 feet (4) side yard width 20 feet total, minimum 7 feet one side (5) rear yard depth 40 feet”

• Lot coverageSpecified

  Lots in the R-1 one-family residence district (section 40-2-12) inside Anna city

  • Subject to the modifications of article iv of chapter 40.

  maximum lot coverage: <= 20 percent

  “(d) lateral dimension regulations. the following minimum requirements shall be observed, subject to the modification of article iv: (1) lot area 10,000 square feet (2) frontage 80 feet (3) front yard depth 35 feet (4) side yard width 20 feet total, minimum 7 feet one side (5) rear yard depth 40 feet (6) floor area 1,200 square feet (7) maximum lot coverage 20 percent”

• Building heightSpecified

  Principal structures in the R-1 one-family residence district (section 40-2-12) inside Anna city

  • Subject to the modifications of article iv of chapter 40.
  • Accessory structures are limited separately in the same subsection.

  maximum building height: <= 30 feet (whichever is lower of 2.5 stories or 30 feet) · maximum building height: <= 2.5 stories (whichever is lower of 2.5 stories or 30 feet) · maximum accessory structure height: <= 15 feet (one story maximum; except as provided in article iv)

  “(c) height of structures. no structure shall exceed two and one-half (2 ½) stories or thirty (30) feet in height, whichever is lower, and no accessory structure shall exceed one (1) story or fifteen (15) feet in height except as provided in article iv.”

• Manufactured homesLimited

  Mobile homes, manufactured homes, trailers, vehicles, semitrailers and cargo shipping containers used for business or industrial use, or for uses accessory to a principal structure, on any property in Anna city. This is not a rule on living in a manufactured home as a principal dwelling, which was not found.

  • Exceptions: licensed operable vehicles parked in off-street loading spaces for up to 90 days; construction trailers at active sites; portable or modular storage buildings with building and zoning permits; bona fide truck or equipment terminals with a zoning certificate.
  • Stated to apply in all zoning districts.

  “no mobile home, manufactured home, trailer, vehicle, semitrailer, or cargo shipping container, except those as allowed in paragraph (7)(b) of this section, or similar movable structure shall be located or used on any property for business or industrial use, or for uses accessory to any principal structure, including storage of any kind, in all zoning districts.”

• Subdividing landRegulated (with conditions)

  Subdivision and development of land inside Anna city under the subdivision code (chapter 34)

  • Lots in a subdivision must conform to the minimum lot area and dimension requirements of the zoning district (section 34-5-4).
  • Sanitary sewer and water provisions are in chapter 34 divisions x and xi; the plat approval process was not opened in full.

  “this code regulates the subdivision and development of land in order to implement the comprehensive plan and official map duly adopted by the city.”

Still unanswered

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

• Building permit — New residential construction inside Anna city
• Owner-builder exemption — Owner-builder exemption inside Anna city
• Building code adopted — Building code adoption inside Anna city
• Inspections — Building inspections inside Anna city
• Certificate of occupancy — Certificate of occupancy for a new dwelling inside Anna 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.