Bolthole Index

Kendall County, Illinois

Building permits, zoning and septic in Village of Oswego, Illinois

Village of Oswego, Illinois requires building permits for building and remodeling projects inside Village limits.1 Village Development Services administers zoning, while Kendall County Health Department regulates septic systems in unsewered Kendall County.23 Oswego prohibits living, sleeping or housekeeping in recreational vehicles within Village boundaries.4

At a glance

Building permits
Required through the Village for building and remodeling projects1
Zoning
Village Development Services administers zoning2
Septic
County Health Department permits construction and repair in unsewered areas3
RV living
Living, sleeping and housekeeping in RVs prohibited within Village boundaries4
R-1 coverage
Principal structure: 15% maximum impervious coverage; total: 25%5
Owner plumbing
Limited Illinois exemption for qualifying owner occupants; permits and inspections still apply67

Who to call

Building permits

Village of Oswego Building & Permits

Village building questions and inspection scheduling

630-554-2310

[email protected]

100 Parkers Mill, Oswego, IL 60543

Zoning

Village of Oswego Development Services

Village zoning applications and pre-application meetings

(630) 554-3622

[email protected]

Septic permits

Kendall County Health Department, Environmental Health Services

Onsite wastewater plan review, building or repair permits and inspections in unsewered Kendall County

(630) 553-8026

Contact details are copied from each office’s official page and were checked against it on October 11, 2026.

Off-grid gear

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

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Do you need a building permit in Village of Oswego, IL?

Village of Oswego requires building permits for building and remodeling projects, and provides project-specific residential, commercial and new-home applications.1 To apply in Oswego, email the permit application and supporting documents to [email protected].8 For building questions or inspection scheduling, call the Village Building & Permits office at 630-554-2310.9

Oswego’s Business Occupancy Permit applies to new businesses and changes in business location, name or ownership; that requirement does not establish the residential occupancy procedure.10 Ask Building & Permits which inspections and residential occupancy approvals your home needs.9

Does Village of Oswego have zoning and district limits?

Village of Oswego has zoning administered through Development Services and its Unified Development Ordinance.2 Oswego publishes district-specific residential bulk and setback regulations, so ask Development Services to identify the parcel’s district before settling on a house layout.1112

In Oswego’s R-1 Residential District, maximum impervious coverage is 15% for the principal structure and 25% total; maximum principal building height is 35 feet and 2.5 stories.513 In Oswego’s A-1 Agricultural District, maximum total impervious coverage is 5%, and maximum principal building height is 35 feet.1415 These limits belong to the named districts; use the parcel’s actual district requirements when discussing setbacks with Development Services.1112

How do septic permits work inside Village of Oswego?

For an unsewered Oswego property in Kendall County, Kendall County Health Department handles onsite wastewater construction or repair permits and inspections.3 The county ordinance prohibits installing, repairing or renovating an onsite wastewater treatment system before the department issues a permit.3

Kendall County’s septic application instructions require a soil evaluation by a state-certified soil classifier, soil analysis, a detailed site drawing, completed application forms and required fees.16 Call Environmental Health Services at (630) 553-8026 to discuss the proposed system or existing permit records.17 Village zoning and building applications go to Oswego’s offices; onsite wastewater review stays with the county health office for unsewered Kendall County properties.283

Can you live in an RV or tiny home in Village of Oswego?

Village of Oswego prohibits using a recreational vehicle for living, sleeping or housekeeping anywhere within Village boundaries.4 Oswego also prohibits connecting RVs to sewer, water or other utilities, except temporary service connections for basic maintenance.4 That maintenance exception does not create permission to occupy the RV, and the occupancy rule is separate from RV parking rules.4

We could not confirm Oswego’s tiny-home occupancy rules or a minimum dwelling floor area; ask Village Development Services whether the proposed dwelling type is allowed on the parcel.12 For a proposed tiny home that involves building work, discuss the project-specific building application with Village Building & Permits.19

Building a home in Village of Oswego: what comes first?

Start with the parcel and proposed use, then prepare the applicable Village building application; Oswego administers zoning and requires building permits for covered projects.21

  • Ask Development Services to identify the zoning district and discuss the proposal; a pre-application meeting is available before submitting a zoning application.1112
  • For an unsewered Kendall County parcel, discuss septic design and permitting with Environmental Health Services.3
  • Email the Village building application and supporting documents to [email protected].8
  • Contact Village Building & Permits to schedule building inspections.9

Illinois’s owner-occupant plumbing exemption is limited to qualifying plumbing work, requires code compliance and inspection, and does not eliminate local plumbing permits.67

What should you check before buying in Village of Oswego?

For land outside Village boundaries, use the Kendall County guide: Kendall County issues building permits for new construction in unincorporated areas, while Oswego’s own building requirements apply inside Village limits.181 Within Oswego, driveway culvert work has a Village permit requirement.19

Kendall County Health Department issues permits for construction or repair of water wells and for capping or sealing wells.20 We could not confirm Oswego’s water or sewer connection requirements, floodplain development procedure or agricultural building exemption; ask Development Services about those parcel-specific requirements before committing to a design.12 We also could not confirm the Village’s adopted building-code editions or current building permit fees; request those details from Village Building & Permits.9

Watch-outs

  • Oswego’s temporary RV utility connection exception is for basic maintenance; RV living and sleeping remain prohibited.4
  • The Illinois owner-occupant plumbing exemption does not establish a general exemption from Oswego building permits.61

Sources

  1. Permits | Village of Oswego, Illinois (Village of Oswego), quoted and re-checked
  2. Development Services | Village of Oswego, Illinois (Village of Oswego), quoted and re-checked
  3. Onsite Wastewater Treatment Systems - Property Owner, quoted and re-checked
  4. Village of Oswego Code of Ordinances, Appendix B, Section 10.08 Recreational Vehicle Parking (Village of Oswego), quoted and re-checked
  5. Village of Oswego Code of Ordinances, Appendix B, Section 8.11 Residential Zoning Districts (Village of Oswego), quoted and re-checked
  6. HB5913 Enrolled — Illinois Plumbing License Law amendment (Illinois statewide rule), quoted and re-checked
  7. 225 ILCS 320/18 — Local regulation; Department standards (Illinois statewide rule), quoted and re-checked
  8. Permits | Village of Oswego, Illinois (Village of Oswego), quoted and re-checked
  9. Village of Oswego Building & Permits (oswegoil.org)
  10. Permits | Village of Oswego, Illinois (Village of Oswego), quoted and re-checked
  11. Village of Oswego Code of Ordinances, Appendix B, Section 8.11 Residential Zoning Districts (Village of Oswego), quoted and re-checked
  12. Village of Oswego Development Services (oswegoil.org)
  13. Village of Oswego Code of Ordinances, Appendix B, Section 8.11 Residential Zoning Districts (Village of Oswego), quoted and re-checked
  14. Village of Oswego Code of Ordinances, Appendix B, Section 8.09 A-1 Agricultural District (Village of Oswego), quoted and re-checked
  15. Village of Oswego Code of Ordinances, Appendix B, Section 8.09 A-1 Agricultural District (Village of Oswego), quoted and re-checked
  16. Well and Septic Permit Application Instructions, quoted and re-checked
  17. Kendall County Health Department, Environmental Health Services (kendallhealth.org)
  18. Building: Permits, Forms, & Handouts, quoted and re-checked
  19. Public Infrastructure | Village of Oswego, Illinois (Village of Oswego), quoted and re-checked
  20. Water Wells - Property Owner, quoted and re-checked

Written October 11, 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 Village of Oswego

Village of Oswego’s own rules

  • Building permitRequired

    Building and remodeling projects inside Village of Oswego limits.

    • The Village page directs applicants to project-specific residential, commercial, and new-home permit applications.
    “To ensure you are compliant with all Village of Oswego Building and Permit regulations, follow the proper procedures and obtain the required permits when building, remodeling, and completing any of the following projects:”
  • Certificate of occupancyLimited

    New businesses, businesses changing location or name, and businesses changing ownership inside Village of Oswego limits.

    • The cited Village page describes a Business Occupancy Permit; it does not establish a general residential certificate-of-occupancy rule.
    “You are required to secure a Business Occupancy Permit if you are a new business, a current business changing your location, a current business changing your business name, or a current business changing ownership.”
  • Local zoningPresent (with conditions)

    Land inside Village of Oswego limits.

    • Zoning matters are administered through Village Development Services and the Unified Development Ordinance.
    “This department provides guidance to property owners, developers, citizens and other units of government on planning and other zoning related issues.”
  • Zoning districtsPublished (with conditions)

    Village of Oswego zoning districts.

    • The cited residential table covers R-1 through R-5; the supplied code separately publishes A-1 district requirements.
    “Table 8.11.1 Residential Zoning District Requirements and Figure 8.11.1 Residential Zoning District Requirements establish bulk and setback regulations for the R-1, R-2, R-3, R-4, and R-5 Districts.”
  • Living in an RVProhibited

    Living, sleeping, or housekeeping in a recreational vehicle within Village boundaries.

    • Temporary utility service connections for basic maintenance are excepted.
    • This does not address parking of a recreational vehicle under the separate parking rules.
    “Recreational vehicles must not be used for living, sleeping or housekeeping purposes while located within Village boundaries. Recreational vehicles must not be connected to sewer, water, or other utilities for any period of time, except for temporary service connections for basic maintenance.”
  • Driveway accessRequired

    Driveway culverts and related access work inside Village limits.

    • The Village Public Infrastructure page identifies permits for driveway culverts.
    “Permits for sump line installations and driveway culverts.”
  • Permit processPartial

    Village building and permit applications.

    • Applicants are directed to email the permit application and supporting documents.
    • The page provides project-specific applications but not a complete timing or fee process.
    “TO APPLY FOR A PERMIT: Please email permit application and supporting documents to [email protected]”

Rules another office applies inside Village of Oswego

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

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Village of Oswego or Kendall County directly.

  • Owner-builder exemption — Owner-built residential construction inside Village of Oswego limits.
  • Building code adopted — Building work inside Village of Oswego limits.
  • Minimum dwelling size — Principal dwellings inside Village limits.
  • Camping on your land — Temporary camping on private land inside Village limits.
  • Tiny homes — Tiny-home occupancy inside Village limits.
10 more unanswered
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Building in a floodplain
  • Permit fees

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 Village of Oswego publishes no rule on the point, not that none exists. Kendall County’s page lists the county offices to call.

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