Grayville, IL Zoning, Building Permits & Septic Rules

Grayville, Illinois adopts and administers its own zoning, with agricultural, single-family residence, mobile home, business and industrial districts¹². The city posts a building permit application at City Hall³, but we could not confirm when it is required, so ask before you build. Private septic permits in White County go through the Egyptian Health Department⁴.

At a glance

Zoning: Yes, the city has its own zoning chapter and zoning board¹
Building permit: City posts an application; when it applies is unconfirmed, ask City Hall³
Septic: Egyptian Health Department permits and inspects private systems in White County⁴
Mobile homes: Not allowed in the R-2 district; permitted in the MH district⁵⁶
Minimum home size (R-2): 1,500 sq ft ground floor⁷
Height limit (R-2): 30 feet⁸
Lot coverage (R-2): 35% of lot area, accessory buildings included⁹
RV living: Not confirmed inside the city; ask City Hall³

Who to call

Building permits

Grayville City Hall

Forms and permits for the City of Grayville, including a building permit application; first call for zoning and building questions inside city limits

618-375-3671

cityadministrator@grayville-il.gov

119 S. Middle Street Grayville, IL 62844

Septic permits

Egyptian Health Department, Carmi office

Private sewage (septic) permits and inspections for White County

(618) 382-7311

1705 College Avenue, Carmi, IL 62821

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

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

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Does Grayville, Illinois have zoning?

Yes. The City of Grayville adopts and administers its own zoning chapter, and the rules apply inside city limits only, not in the unincorporated county¹. The city's zoning districts cover agriculture, two single-family residence districts (R-1 and R-2), a mobile home district (MH), two business districts (C-1 and C-2) and an industrial district (I-1)².

Dimensional rules depend on the district. In the R-2 single-family district, buildings may not exceed 30 feet in height⁸, buildings including accessory buildings may cover no more than 35% of the lot⁹, and a single-family dwelling needs a ground floor of at least 1,500 square feet⁷. In the MH district, lots must be at least 50 feet wide¹⁰. We could not confirm the R-1 setbacks or lot sizes, so ask City Hall for the district of the specific lot³.

Do you need a building permit in Grayville, and who issues it?

Grayville City Hall is the office to ask. The city's forms and permits page lists a building permit application³, so the city does run a building permit process of some kind. We could not confirm which projects require a permit, what inspections follow, or what the fees are, so call City Hall before you pour a foundation.

Illinois itself does not issue building permits for privately funded homes; any permit or inspection requirement is set by the local government¹¹. Statewide building-code baselines have applied since 2025, and local codes must meet at least the International Residential Code for structural design¹². Outside city limits the picture differs: unincorporated White County has no zoning ordinances and requires no building permits¹³. That rule does not apply to land inside Grayville.

How do septic permits work in Grayville?

Private septic systems in White County are permitted through the Egyptian Health Department, which serves Gallatin, Saline and White counties¹⁴. Any new or renovated system must be installed by a licensed contractor or the homeowner, and the agency reviews an application and construction plan before issuing a permit, then inspects during and after construction⁴. State rules also require plan approval before construction begins and notice at least 48 hours before work starts¹⁵.

We could not confirm whether any lot inside Grayville is on city sewer or needs a private system, so ask City Hall about sewer service and the Egyptian Health Department's Carmi office about septic³¹⁶. Across White County only 8.6% of soils rate as not limited for a conventional drain field, so expect a site evaluation and possibly an engineered system¹⁷.

Can you live in an RV, tiny home or mobile home in Grayville?

Mobile homes are not permitted in the R-2 single-family district⁵. They are allowed in the MH mobile home district or park, subject to its standards, and Illinois Mobile Home Park Act standards override the city's where they are stricter⁶.

A mobile home moved into or within the city must contain at least 980 square feet of living area¹⁸. The owner pays a $25 inspection fee¹⁹, and an electrical inspection by a licensed electrician is also required at the owner's cost.

We could not confirm Grayville's rules for living in an RV or for tiny homes on a foundation, and the state campground licensing rules do not answer the question of living in an RV on your own lot. Ask City Hall before you buy or park anything³.

Building a home in Grayville: the steps, in order

Call Grayville City Hall and ask which zoning district the lot is in, whether a building permit applies, and whether the lot has city sewer and water³.
Check the district rules against your plan: in R-2, that means the height, coverage and floor-area limits above⁸⁹⁷.
If the lot needs a private septic system, apply to the Egyptian Health Department with a construction plan⁴.
If you want a private well, a water-well construction permit comes from the local health department before work begins²⁰.
If the driveway meets a state highway, IDOT requires a permit before work in the right-of-way²¹.
Ask City Hall about inspections and occupancy before move-in; the state does not issue occupancy permits for private homes²².

What stays with White County, and what to check before you buy in Grayville

Septic and well permits sit with the health department, not City Hall, and state law covers wells²⁰. Land outside city limits in White County falls under a different answer: the unincorporated area has no zoning and no building permit requirement, but the builder must check floodplain status with the Supervisor of Assessments first¹³.

Before buying inside the city, confirm the zoning district, floodplain status and sewer service with City Hall³. White County's effective property tax rate is 1.4%²³, with a median property tax bill of $1,388 a year²⁴.

Watch-outs

We could not confirm when Grayville requires a building permit, what inspections follow, or what the fees are; call City Hall at 618-375-3671 before starting work³.
Mobile homes are barred from the R-2 district and belong in the MH district, so buying an R-2 lot for a mobile home will not work⁵.
Unincorporated White County rules do not apply inside Grayville; the county's lack of zoning covers only the land outside city limits¹³.

Sources

Written October 24, 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.

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

Zoning, building permits and septic rules in Grayville, Illinois