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

Rules another office applies inside Portland Township

Portland 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

  Structures built, moved, altered or demolished on unincorporated land inside Portland township

  • Applies to unincorporated areas only; the page does not address land inside a municipality.
  • Applications must be presented in person at the Building & Zoning office, 18819 Lincoln Road, Morrison, IL 61270.
  • Payment is due at submittal by cash, check, money order or credit card (service fees apply).
  • The page does not state fee amounts or whether a septic permit must precede a building permit.

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

• Owner-builder exemptionConditional

  Installing a private on-site sewage (septic) system inside Portland township; building-construction owner-builder rules were not found

  • Owner exemption applies only if the individual owns and occupies a single-family dwelling and passes the homeowner test.
  • Otherwise the system must be installed by a licensed contractor.
  • Homeowner installation permit fee is listed on the same form.

  “unless individual owns and occupies single family dwelling, passes the homeowner test, installation shall be installed by a licensed contractor”

• Building code adoptedAdopted (with conditions)

  Building codes listed for unincorporated Whiteside County, applied to land inside Portland township that is not within an incorporated municipality

  • Notice is effective January 1, 2025.
  • Applies to unincorporated areas only; land inside a municipality follows that municipality's codes, which were not checked.
  • The notice marks the 2014 Illinois State Plumbing Code, the 2018 Illinois Accessibility Code and the 2021 International Energy Conservation Code as codes currently in effect by reference to the State of Illinois.
  • A non-official copy of county Chapter 39 cites a 2015 International Building Code adoption (ordinance no. 18, June 20, 2017); this official 2025 notice lists 2021 editions. The two were not reconciled.

  adopted building codes (unincorporated areas): 2021 IBC, IFC, IMC, IFGC, IPSC, IEBC, IRC and IECC; 2020 NEC; 2014 Illinois State Plumbing Code; 2018 Illinois Accessibility Code

  “applicable building codes for the unincorporated areas of whiteside county: 2021 international building code (ibc)”

• Who permits septicCounty (with conditions)

  Private residential on-site sewage systems on land inside Portland township, administered by the Whiteside County Health Department

  • The county health department's permit form is county-wide; it does not name Portland township specifically.
  • The form does not cite the Illinois Private Sewage Disposal Code; whether the state code applies in Whiteside County was not confirmed on an official page.

  “whiteside county health department, 1300 w 2nd street, rock falls, il 61071 phone: 815 626 2230”

• Septic permitRequired

  New private residential on-site sewage system installation on land inside Portland township

  • Form is the 2025 homeowner application; it states no effective date.
  • Site plan, soil information and well/septic distances are required on the application.
  • Installation must be by a licensed contractor unless the owner-occupant exemption applies.
  • A variance request option appears on the form.

  “permit application to construct a private residential on-site sewage disposal system for homeowner”

• Building in a floodplainLimited

  New private on-site sewage developments inside the 100-year floodplain on land in Portland township, as stated on the county health application footnote

  • Stated on the health form as a footnote to the flood question; the full scope of 'new developments' is not defined on the form.
  • General county floodplain development rules (Building & Zoning 'flood information') were not opened.

  “*new developments prohibited in 100 year floodplain”

• Permit feesPublished (with conditions)

  Private residential on-site sewage system permit fee, for land inside Portland township; building permit fees were not found

  • Fee shown on the 2025 homeowner application; a higher fee may apply to non-homeowner installations (not stated).
  • Building and zoning permit fees were not published on the pages opened; permits are paid at submittal.

  homeowner installation permit fee: 460 USD (listed on the 2025 application form) · tank only permit fee: 360 USD (tank-only option on the same form)

  “homeowner installation permit fee*: $460.00 tank only: $360.00”

• Permit processPartial

  Building and demolition permit applications for unincorporated land inside Portland township

  • Applications are presented in person at the Building & Zoning office, 18819 Lincoln Road, Morrison, IL 61270; office hours 8:30 am to 4:30 pm.
  • Payment is due at submittal.
  • No published step-by-step process, zoning review, or septic-permit sequencing was found on the pages opened.

  “all permit applications must be presented in person at the building and zoning office.”

Still unanswered

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

• Inspections — Building inspections for construction inside Portland township
• Certificate of occupancy — Certificate or occupancy permit for a new home inside Portland township
• Local zoning — Whether Portland township itself adopts and administers a zoning ordinance for land inside its limits
• Zoning districts — Zoning district map or schedule applicable inside Portland township
• Minimum dwelling size — Minimum dwelling size inside Portland township, main single-family residential district

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.