Bolthole Index

Coles County, Illinois

Building permits, zoning and septic in Charleston Township, Illinois

Charleston Township, Illinois has different building-permit rules inside and outside the City of Charleston: the city requires building and zoning use permits before projects begin.1 Outside municipal zoning jurisdictions, Coles County requires no building permit and has no county zoning.23 In Coles County, private sewage plan approval and inspections stay with the Coles County Health Department.4

At a glance

Building permits
City building and zoning use permits required; county building permits not required outside municipal jurisdictions12
Zoning
City zoning reaches beyond city limits; no county zoning outside municipal zoning jurisdictions53
Private sewage
Coles County Health Department approves plans and inspects systems4
RV and tiny-home living
We could not confirm township-wide occupancy rules; ask City Planning about the parcel5
Private wells
State or approved local health department permit required before well work6
Owner plumbing
Qualifying owners may do plumbing, subject to code and inspection; no blanket building-permit exemption78

Who to call

Building permits

City of Charleston Building and Development Services

Building and zoning use permits, construction inspections, occupancy certificates, and water and sewer tapping permits inside city limits.

(217) 345-5650

[email protected]

Planning & zoning

City of Charleston Planning and Zoning

City zoning districts, setbacks, land-use review, and zoning jurisdiction beyond city limits.

(217) 345-8452

Health department

Coles County Health Department, Environmental Health

Environmental Health programs for sewage systems and water wells

(217) 348-0530

[email protected]

753 Windsor Road, Charleston, IL 61920

Septic permits

Coles County Health Department Sewage Program

Private sewage plan approval, site and final inspections, soil-evaluation guidance, and complaints

Planning & zoning

Coles County Regional Planning

County floodplain-development and subdivision questions for unincorporated land.

217-348-0521

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Off-grid gear

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

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Do you need a building permit in Charleston Township, IL?

Inside the City of Charleston portion of Charleston Township, obtain the city’s building and zoning use permit before starting a project.1 Charleston has adopted the 2021 International Building Code with local modifications.9 Outside municipal zoning jurisdictions, Coles County does not require building permits, but that county answer does not establish permission for a parcel within Charleston’s zoning jurisdiction.23 Ask City Planning to identify the parcel’s jurisdiction before treating rural land as free of local zoning review.5

For city building permits, the published fee is $4.50 per $1,000 of estimated construction cost, with a $25 minimum; new one-family dwelling applications have a fee exemption through December 31, 2028.10 Confirm the exemption’s application to your project with Building and Development Services.1

Who handles building permits in Charleston Township?

City of Charleston Building and Development Services handles construction permitting and inspections within the corporate limits; contact the building office using the verified contact details below.1 City Planning handles zoning questions, including land beyond city limits within Charleston’s zoning jurisdiction.5 Coles County Health Department remains the local office for private sewage plan approval and inspections inside Charleston Township.4

The city’s building and zoning use application calls for the completed form, legal description, property tax identification number, scaled plot or site plans, and a floor plan when applicable.1 All new city construction must be inspected before a certificate of occupancy can be obtained.1 The city building department also issues water and sewer tapping permits before connection to city mains.1

Does Charleston Township have zoning, lot-size or setback rules?

Charleston city zoning extends beyond city limits, so an unincorporated address in Charleston Township can still fall under city zoning.5 Outside municipal zoning jurisdictions, the county has no zoning; that boundary matters more than the township name on the address.3

Charleston’s city zoning standards set minimum lot size, lot width, setbacks, building coverage and height by district rather than providing a single township-wide standard.11 Ask City Planning for the parcel’s district and permitted uses before choosing a home location or purchasing a small lot.5 For land outside the relevant municipal jurisdiction, see the Coles County guide; unincorporated subdivision activity and floodplain development still face county ordinances.1213

How do septic permits and wells work in Charleston Township?

Coles County Health Department approves private sewage plans and conducts on-site and final inspections in Charleston Township.4 Illinois requires plan approval before construction of a new private sewage disposal system and at least 48 hours’ notice before system work begins.14 Start with a soil evaluation, the first step identified by the county sewage program.15

Across Coles County, only 1.9% of soils are rated not limited for conventional septic drain fields; that county-wide rating calls for a site evaluation and potentially an engineered system, rather than proving septic impossible on a particular lot.16 A new or renovated private sewage system generally cannot be approved where a permitted sanitary sewer is available within 300 feet of a residential property, subject to the stated connection exceptions.17 New well construction, modification and abandoned-well sealing require a permit from IDPH or an approved local health department before work begins; ask County Environmental Health which office processes your application.618

Can you live in an RV or tiny home in Charleston Township?

We could not confirm a township-wide rule for residential RV occupancy, temporary camping, tiny homes, accessory dwellings or minimum dwelling size; ask City Planning about the parcel’s jurisdiction and proposed use before relying on any of those options.5 City zoning includes permitted and conditional uses within individual districts, so the parcel’s district is part of the answer.5

In the City of Charleston, inhabited manufactured homes generally must be in manufactured-home parks unless a code exception applies; temporary manufactured homes or temporary buildings used with construction work are permitted.19 That manufactured-home provision does not resolve the unconfirmed RV or tiny-home question.19 For off-grid sanitation, Illinois permits specified human-waste systems under technical rules, but other domestic wastewater must still go to a conventional private sewage disposal system.20

How should you plan a home in Charleston Township before buying land?

  1. Ask City Planning to identify whether the parcel falls within Charleston’s zoning jurisdiction and which district standards apply.5
  2. Discuss sewage with Coles County Health Department and obtain a soil evaluation before settling the home and drain-field layout.415
  3. For a project inside city limits, prepare the building and zoning use application and scaled site plans; arrange the required city construction inspections before occupancy.1
  4. For unincorporated land, ask Coles County Regional Planning about floodplain development and subdivision review.131221
  5. If access work enters a state-maintained highway right-of-way, obtain the IDOT permit before work begins.22

A qualifying owner may perform plumbing on a single-family home intended for personal occupancy, but Illinois plumbing standards and inspections still apply; that exemption is not a general exemption from local building permits.78

Watch-outs

  • Charleston city zoning reaches beyond the city limits; an unincorporated Charleston Township parcel is not automatically outside city zoning.5
  • We could not confirm township-wide RV or tiny-home occupancy permission; ask City Planning before planning temporary housing during construction.5
  • An approved compost toilet does not eliminate Illinois requirements for disposing of other domestic wastewater.20

Sources

  1. City of Charleston Building and Development Services (charlestonillinois.org)
  2. Coles County - Zoning (2026 county census)
  3. Coles County Zoning (Charleston Township), quoted and re-checked
  4. Coles County Health Department: Private Sewage (Charleston Township), quoted and re-checked
  5. City of Charleston Planning and Zoning (charlestonillinois.org)
  6. 77 Ill. Admin. Code 920.130, Water Well Permit Requirements (Illinois statewide rule), quoted and re-checked
  7. HB5913 Enrolled — Illinois Plumbing License Law amendment (Illinois statewide rule), quoted and re-checked
  8. 225 ILCS 320/18 — Local regulation; Department standards (Illinois statewide rule), quoted and re-checked
  9. 9-1-1: Adoption Of Code (Charleston Township), quoted and re-checked
  10. 9-2-2: Amendments To Code (Charleston Township), quoted and re-checked
  11. 10-8-1: Density And Dimensional Standards (Charleston Township), quoted and re-checked
  12. Coles County Zoning and Subdivision Regulations (Charleston Township), quoted and re-checked
  13. Coles County Zoning and Subdivision Regulations (Charleston Township), quoted and re-checked
  14. 77 Ill. Adm. Code 905.190 Installation Approval (Illinois statewide rule), quoted and re-checked
  15. Coles County Health Department Sewage Program (colesco.illinois.gov)
  16. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  17. 77 Ill. Adm. Code 905.20 General Requirements, quoted and re-checked
  18. Coles County Health Department, Environmental Health (colesco.illinois.gov)
  19. 10-1-5: Compliance With Provisions (Charleston Township), quoted and re-checked
  20. 77 Ill. Adm. Code 905.130 Human Waste Disposal (Illinois statewide rule), quoted and re-checked
  21. Coles County Regional Planning (colesco.illinois.gov)
  22. Highway Permits (Illinois statewide rule), quoted and re-checked

Written October 12, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

Answers from the rulebook for Charleston Township

Charleston Township’s own rules

  • Building code adoptedAdopted

    Building construction within the City of Charleston portion of Charleston township.

    • The adopted code is the 2021 International Building Code, subject to the modifications, exceptions, and additional regulations in section 9-1-2.
    • The adoption ordinance is dated November 1, 2024.

    code edition: International Building Code, 2021 edition (subject to section 9-1-2 modifications, exceptions, and additional regulations)

    “That certain document, three (3) copies of which were heretofore placed on file in the office of the city clerk, being marked and designated the international building code, 2021 edition, as published by the International Code Council, Incorporated, is hereby adopted as the building code of the city”
  • Zoning districtsPublished (with conditions)

    City of Charleston zoning districts inside Charleston township.

    • The opened city code publishes residential districts A, RE, R-1, R-2/R-2U, and R-3/R-3U, plus nonresidential districts C-1, C-2, C-3, I-1, and I-2.
    • District standards include minimum lot size, lot width, setbacks, maximum building coverage, and maximum height.
    “TABLE 8-1: DENSITY AND DIMENSIONAL STANDARDS Districts | Minimum Lot Size (Square Feet) | Minimum Lot Width (Feet) | Minimum Setbacks | Maximum Building Coverage (Percent) | Maximum Height”
  • Manufactured homesLimited

    Inhabited manufactured homes inside the City of Charleston portion of Charleston township.

    • The home must be located in a manufactured home park unless an exception in the title applies.
    • Temporary use of a manufactured home or temporary building in conjunction with construction work is permitted.
    • A manufactured or mobile home may not be used as an accessory structure in a residential district.
    “All inhabited manufactured homes shall be located in a manufactured home park, except as otherwise provided for in this title. The temporary use of a manufactured home or a temporary building in conjunction with construction work shall be permitted.”
  • Permit feesPublished (with conditions)

    City building permits inside the City of Charleston portion of Charleston township.

    • Building permit fee is $4.50 per $1,000 of estimated construction cost, minimum $25.
    • Complex designs may incur professional plan-review and inspection costs.
    • New one-family dwelling permit fee exemptions apply to applications submitted from February 3, 2016 through December 31, 2028.
    • Reinspection is $50; appeal fee is $150; starting without a valid permit is $100 per day.

    building permit fee: per 4.5 USD per $1,000 estimated construction cost (minimum $25; additional plan-review or inspection cost may apply) · reinspection fee: 50 USD · appeal fee: 150 USD · unpermitted construction fee: per 100 USD per day

    “The fee for building permits shall be four dollars and fifty cents ($4.50) per every one thousand dollars ($1,000.00) of the estimated construction cost, with a minimum permit fee of twenty-five dollars ($25.00).”

Rules another office applies inside Charleston Township

Charleston Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Local zoningAbsent

    Land inside Charleston township but outside the zoning jurisdictions of incorporated municipalities.

    • The county page identifies Charleston as a municipal zoning jurisdiction and states that the county has no zoning outside those jurisdictions.
    • Charleston city zoning may extend one and one-half miles beyond the corporate limits under the city code.
    “Please be advised that there is no Coles County zoning pertaining to any parcel located outside the zoning jurisdictions of the municipalities of Mattoon, Charleston, Oakland, Lerna, Humboldt, and Ashmore.”
  • Who permits septicState (with conditions)

    Private sewage disposal systems inside Charleston township are regulated under Illinois state private-sewage rules.

    • Local health agencies may review sewage construction plans by local ordinance or as agents of IDPH.
    “The Illinois Department of Public Health (IDPH) regulates the installation of all private sewage disposal systems that have no surface discharge”
    One more reviewed finding on this topic
    • County (with conditions) — Private sewage disposal systems inside Charleston township are administered locally by the Coles County Health Department.
      “The sewage program is responsible for approving plans for all private sewage disposal systems, conducting on site inspections, final inspections, and complaint investigations as they are received.”
  • Subdividing landRegulated (with conditions)

    Subdivision activity in the unincorporated portion of Charleston township.

    • The county page identifies subdivision as one of the developments regulated by county ordinances.
    • Municipal subdivision rules may apply inside municipal jurisdictions.
    “Coles County does have ordinances which regulate the location, siting, and operations of certain developments, including those in a flood plain, subdivisions, regional pollution control facilities, entertainment, junkyards, and solar/wind commercial development.”
  • Building in a floodplainLimited

    Floodplain development in the unincorporated portion of Charleston township.

    • Coles County states that its ordinances regulate developments in a flood plain.
    • The opened page did not provide the numeric floodplain standards or permit procedure.
    “Coles County does have ordinances which regulate the location, siting, and operations of certain developments, including those in a flood plain, subdivisions, regional pollution control facilities, entertainment, junkyards, and solar/wind commercial development.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Charleston Township or Coles County directly.

  • Owner-builder exemption — Owner-builder exemption for land inside Charleston township.
  • Minimum dwelling size — Minimum dwelling size inside Charleston township.
  • Living in an RV — Residential or long-term RV occupancy inside Charleston township.
  • Camping on your land — Temporary camping on private land inside Charleston township.
  • Tiny homes — Tiny-home occupancy inside Charleston township.
7 more unanswered
  • Accessory dwellings
  • Septic permit
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Short-term rentals

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.

Unanswered questions are usually a sign that Charleston Township publishes no rule on the point, not that none exists. Coles County’s page lists the county offices to call.

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