Zoning, building permits and septic rules in Lyndon Township, Illinois

Rules another office applies inside Lyndon Township

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

• Building permitRequired

  Building and demolition permits for structures built, moved, altered or demolished in unincorporated Whiteside County, including land inside Lyndon township outside any incorporated municipality

  • Permits must be presented in person at the county Building & Zoning office.
  • Permits must be paid at submittal by cash, check, credit card (service fees apply) or money order.
  • Construction may proceed after the permit is issued.

  “building and demolition permits are required for all structures built, moved, altered, demolished, destroyed by natural forces in unincorporated areas of whiteside county.”

• Building code adoptedAdopted

  Building construction on land in the unincorporated areas of Whiteside County, which includes land inside Lyndon township outside any incorporated municipality

  • The county list names the 2021 International Residential Code (IRC) among the codes applicable in unincorporated areas; the 2018 Illinois Accessibility Code, 2014 Illinois State Plumbing Code, and 2021 IECC are marked as in effect by reference to the State of Illinois.
  • Does not apply inside incorporated municipalities, which may adopt their own codes.
  • The list is dated January 1, 2025; the county ordinance text adopting it was not located.

  code edition: 2021 International Residential Code

  “2021 international residential code (irc)”

• Building in a floodplainLimited

  New private on-site sewage system installations inside the 100-year floodplain, per the county health department homeowner form; not a general floodplain-development rule

  • General floodplain development rules for buildings were not located; the county has a flood information page not opened.
  • The form's note marks the restriction with an asterisk and labels it as a rule for new developments in the 100-year floodplain.

  “*new developments prohibited in 100 year floodplain”

• Permit feesPublished

  Homeowner private residential on-site sewage system permit fee only (not building permit fees)

  • The fee is printed on the 2025 homeowner application form; the form's effective date is not stated.

  homeowner installation permit fee: 460 USD (tank only: $360.00)

  “homeowner installation permit fee*: $460.00”

• Permit processPartial

  Building and demolition permit application process in unincorporated Whiteside County, including land inside Lyndon township

  • Applications are in person at the Building & Zoning office, 18819 Lincoln Road, Morrison, IL 61270, office hours 8:30 am to 4:30 pm.
  • Plan review, inspection sequence and certificate steps are not described on the page.

  “all permit applications must be presented in person at the building and zoning office. permits must be paid for at the time of submittal by cash, check, credit card (service fees will apply) or money order.”

Still unanswered

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

• Owner-builder exemption — Owner-builder building permit exemption in unincorporated Whiteside County, including land inside Lyndon township
• Inspections — Building inspections for construction in unincorporated Whiteside County, including land inside Lyndon township
• Certificate of occupancy — Certificate of occupancy for new buildings in unincorporated Whiteside County, including land inside Lyndon township
• Local zoning — Whether Lyndon township itself adopts and administers a zoning ordinance for land inside its limits
• Zoning districts — Zoning district map and schedule for unincorporated Whiteside County, including land inside Lyndon township

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.