You own your house and live in it. Can you share one or two spare rooms with people who are not family, for a month or longer? This page answers that question for Illinois, from its state laws and a sample of its cities and counties. We call it a typical home share.
Illinoisat a glance
Should you worryabout zoning?
Answer four quick questions. We will show you what the rules we found say for a home like yours, and what to ask your city or county. It works for homeowners and for the family members helping them.
Cities and countiesin Illinois
Details for each location
This page is here to help you learn and to give you context. It does not interpret any zoning code and is not legal advice. Rules vary and change, and only your city or county planning office can say what applies to your home.
What the law asksof a home share
Where a state's landlord and tenant law covers home sharing, it gives you and your home sharer a few ground rules. Knowing them up front makes for a better agreement and fewer surprises.
Sharing, boarding, renting, rooming:what the words mean
The laws and codes rarely say "home sharing." They use older words, and each city or county can define them differently. Here is what each word means in everyday terms, and how Illinois and the locations in our sample use it.
For the national picture, the history of these rules, and more resources, see The Rules Behind the Spare Room.
This page is here to help you learn and to give you context. It does not interpret any zoning code and is not legal advice. Rules vary and change, and only your city or county planning office can say what applies to your home.
Citations, Definitions & SourcesOpen the fine printClose the fine printEvery rule on this page is quoted from a law, a code, or a court opinion, with the date we checked it. The sources for Illinois are available by clicking Open the Fine Print.
Definitions
A typical home share. You own your house and live in it, and you share one or two spare rooms with people who are not family, for a month or longer.
The six answers. Yes: the rules we found allow a typical home share with no extra step. Yes, with limits: they allow it but set a limit, such as a number of people or rooms. Yes, after a permit or sign-up: they allow it once a step is done. Not clear: the rules do not answer it either way, or we could not read them. No county zoning found: the county and state sources we read show no county zoning code, though none says so in words. No: the rules do not allow it.
State policy and zoning toward home sharing. The map groups states by what their laws and plans do for home sharing today. A state is Leading when two things are true. First, its law stops cities and counties from limiting who lives together based on family ties, in all cases or in some. Second, the state has committed to home sharing: it names home sharing in its State Plan on Aging, an aging strategy, or an affordable housing plan, funds an ongoing home sharing program, or has a law that allows such funding. A one-time pilot is a welcome first step, but it does not count as a statewide commitment. A state is Supportive when one of the two is true, Open when neither is but its landlord and tenant law clearly covers home sharing, and Getting started when none of these is true yet. A state is marked as an opportunity, in a lighter shade on the map, when it has committed to home sharing but its laws do not yet protect home sharing statewide or do not yet say clearly which ground rules apply. Every check traces to a cited source on the state's page. The groups describe state law and policy, not how welcoming any community is, and not what any particular home may do.
Single housekeeping unit. Many zoning codes say a family or household must live as a "single housekeeping unit." The phrase describes people who live together as one household, sharing the home, rather than as separate tenants under one roof. Most codes use it without saying more, and each city or county decides what it means. The codes in our sample that spell it out point to the same kinds of things: sharing the kitchen and living areas, sharing chores and expenses, and, as signs of separate households, locks on bedroom doors or separate leases. Where a city or county on this page defines the phrase, its entry quotes the definition under Read the code. If your city or county's code uses the phrase, ask the planning office how it applies to a home share, such as one where the person sharing your home pays rent and has their own room.
Checked. The date we last read the source itself. Codes change. Your planning office has the current version.
Sources for Illinois
| Source | Where it is used |
|---|---|
| City of Des Plaines v. Trottner, 34 Ill. 2d 432 (Caselaw Access Project reproduction of the official reporter) | Illinois. Checked 2026-10-08. Open the source. |
| 735 ILCS 5/9-207 (FindLaw reproduction; confirm on the official site) | Illinois. Checked 2026-10-08. Open the source. |
| Public Act 103-0224, amending 765 ILCS 710/1 | Illinois. Checked 2026-10-08. Open the source. |
| 765 ILCS 710/1 (FindLaw reproduction, current as of 1 January 2025; confirm on the official site) | Illinois. Checked 2026-10-08. Open the source. |
| 765 ILCS 710/1, official text on ilga.gov (Source: P.A. 103-224, eff. 1-1-24) | Illinois. Checked 2026-10-10. Open the source. |
| Village of Belle Terre v. Boraas, 416 U.S. 1 (1974) | Illinois. Checked 2026-10-08. Open the source. |
| Moore v. City of East Cleveland, 431 U.S. 494 (1977) | Illinois. Checked 2026-10-08. Open the source. |
| HB 1813 (104th GA) bill status | Illinois. Checked 2026-10-08. Open the source. |
| SB 3726 (104th GA) bill status | Illinois. Checked 2026-10-08. Open the source. |
| SB 4071 (104th GA) bill text; status not confirmed | Illinois. Checked 2026-10-08. Open the source. |
| 775 ILCS 5/3-106, Exemptions (FindLaw reproduction, current as of 1 January 2025; confirm on the official site) | Illinois. Checked 2026-10-08. Open the source. |
| 42 U.S.C. 3603(b)(2) | Illinois. Checked 2026-10-08. Open the source. |
| 42 U.S.C. 1982 | Illinois. Checked 2026-10-08. Open the source. |
| Jones v. Alfred H. Mayer Co., 392 U.S. 409 (1968): section 1982 "contains none of the exemptions" in the Fair Housing Act | Illinois. Checked 2026-10-08. Open the source. |
| 775 ILCS 5/3-106(C); 42 U.S.C. 3603(b)(2); 42 U.S.C. 1982 | Illinois. Checked 2026-10-08. Open the source. |
| Illinois State Plan on Aging FY2026-2028 | Illinois. Checked 2026-10-08. Open the source. |
| EngAging Illinois Multisector Plan for Aging page | Illinois. Checked 2026-10-08. Open the source. |
| EngAging Illinois Multisector Plan for Aging report, 2025 | Illinois. Checked 2026-10-08. Open the source. |
| EngAging Illinois Focus Area 1: Creating Livable and Connected Communities | Illinois. Checked 2026-10-08. Open the source. |
| Illinois' Annual Comprehensive Housing Plan 2026 (IHDA) | Illinois. Checked 2026-10-08. Open the source. |
| Illinois HUD 5-Year 2025-2029 Consolidated Plan (draft of final) | Illinois. Checked 2026-10-08. Open the source. |
| ILGA bill summary, HB1308 (91st GA), Public Act 91-0303 | Illinois. Checked 2026-10-08. Open the source. |
| Municipal Code of Chicago 17-17-0200, General terms (17-17-0248 Dwelling unit; 17-17-0270 Household; 17-17-02163 Single-room occupancy) | Chicago, Illinois. Checked 2026-10-08. Open the source. |
| Municipal Code of Chicago 17-17-0100, Use group and category descriptions (17-17-0102-A Group Living; 17-17-0102-B Household Living; 17-17-0104-S Lodging) | Chicago, Illinois. Checked 2026-10-08. Open the source. |
| Municipal Code of Chicago 17-2-0200, Allowed uses, use table 17-2-0207 | Chicago, Illinois. Checked 2026-10-08. Open the source. |
| Municipal Code of Chicago 4-14-010, Definitions (Shared Housing Units) | Chicago, Illinois. Checked 2026-10-08. Open the source. |
| Municipal Code of Chicago 4-6-290(a), "Transient occupancy" | Chicago, Illinois. Checked 2026-10-08. Open the source. |
| Springfield Code of Ordinances 155.001, Definitions (Family; Lodging house; Lodging room; Tourist home, bed and breakfast inns) | Springfield, Illinois. Checked 2026-10-08. Open the source. |
| Springfield Code of Ordinances 155.016, Regulations of R-1 single-family residence districts | Springfield, Illinois. Checked 2026-10-08. Open the source. |
| Springfield Code of Ordinances 155.018, Regulations of R-3 (a), (b) general residence districts | Springfield, Illinois. Checked 2026-10-08. Open the source. |
| Springfield Code of Ordinances 155.179, Tourist homes, bed and breakfasts inns | Springfield, Illinois. Checked 2026-10-08. Open the source. |
| Springfield Code of Ordinances 100.26, Hotel and motel room tax imposed | Springfield, Illinois. Checked 2026-10-08. Open the source. |
| Pope County, Illinois, official site (would not load through WebFetch) | Pope County, Illinois. Checked 2026-10-08. Open the source. |
Cite This Paper
HomeShare Oregon. (2026). The Rules Behind the Spare Room: Illinois. https://homeshareoregon.org/research/rules-behind-the-spare-room/illinois/
About HomeShare Oregon
HomeShare Oregon publishes this paper as students of aging, housing, and community infrastructure. We operate one of many possible interventions in the missing middle. We believe the most useful contribution we can make to the larger field is to add a frame and a research agenda, rather than to argue for our particular role within it.
If you are working on related questions, we would like to hear from you. Email the executive director at executivedirector@homeshareoregon.org.