Building permits, zoning and septic rules in Tazewell County, Illinois

Yes. Unincorporated Tazewell County requires a building permit for residential structures, and not every structure requires plan review¹. Routine repairs and maintenance are exempt, as are qualifying ornamental or agricultural fences and accessory structures smaller than 25 square feet¹⁰. Building-permit fees vary by project and floor area; a dwelling project of 700–1,000 square feet has a published $400 fee, and starting without the required building permit doubles the fee^1,10. An owner doing residential work may identify the general contractor as SELF, but owner-builder status does not waive the permit or its submittal requirements⁸. The county code adopts the 2018 International Building Code and applies the currently adopted Illinois Energy Conservation Code¹¹. Ask Community Development to identify the plan review and inspection requirements for the exact project¹².

The Tazewell County Community Development Department issues building permits and zoning compliance certificates for unincorporated land¹². The office is in the McKenzie Building, 11 S. 4th Street, Ste. 400, Pekin, IL 61554; call 309-477-2235¹². Pekin, Creve Coeur, Marquette Heights, Tremont handle their own building permits^13,14,15,16. Private-sewage permits throughout Tazewell County remain with the Tazewell County Health Department³. A residential submission needs a 911 address, septic or Health Department approval or a sanitary-district hookup letter, road-access approval, an energy-code report, scaled plans and a site plan⁵. The 48-hour review target for new homes and room additions means contact about status or questions, not guaranteed building-permit issuance⁵.

Tazewell County Community Development administers zoning in unincorporated areas and publishes a zoning-districts map; allowed uses depend on the parcel’s district^2,17. Pekin, East Peoria, Morton, Washington, Tremont, North Pekin, South Pekin, Peoria Heights (mainly in Peoria County, extending into Tazewell County) set their own zoning^{18,19,20,21,22,23,24,25}. Private-sewage permits throughout Tazewell County remain with the Tazewell County Health Department³. County minimum lot size varies by district, public water, sewer availability and soil type²⁶. Primary single- and two-family dwellings need at least 700 square feet per unit⁶. Setbacks depend on district, road classification and principal versus accessory use¹. Community Development also administers the Subdivision Ordinance; ask the department to confirm a proposed land split before treating the resulting lots as buildable^2,12.

The Tazewell County Health Department issues private-sewage permits countywide; constructing, altering or extending a system requires a permit, with a published $150 fee and 1-year validity³. A soil investigation is required unless the ordinance’s pre-site-inspection waiver applies; routine cleaning, cover, baffle or riser replacement and rodding do not require a septic permit²⁷. The Board of Health may refuse a private-system permit where a practical public-sewer connection is available, including a single-family property within 300 feet under the ordinance’s conditions²⁷. The Health Department inspects new and repaired systems and requires zoning inspections for replatting, added bedrooms or floor area, or rebuilding after loss²⁸. A pre-sale operational inspection is recommended, not generally mandatory, and is valid for 90 days²⁸. Only 20.4% of county soils are rated without severe limits for conventional drain fields, making site evaluation a priority before purchase²⁹. Well or pump work requires a $100 Health Department permit; new wells need water analysis and approval before service⁴.

Tazewell County generally limits dwelling occupancy of an RV to an RV park, although a bona fide guest may occupy one for up to 60 days per calendar year⁶. A temporary-use permit can allow an RV or manufactured home at a dwelling destroyed or made uninhabitable by fire or natural disaster while its replacement is built; approved septic is required, and the initial permit and possible extension are each limited to 6 months³⁰. Seasonal RV use in agricultural and conservation districts requires adequate water and sewage facilities plus Health Department approval⁶. Tazewell County has no stand-alone tiny-home category that we could confirm; a primary single- or two-family dwelling still faces the 700-square-foot minimum⁶. A tiny home can work as an accessory dwelling in a residential or agricultural district if the lot’s main use is a single-family dwelling, the accessory dwelling is between 350 and 800 square feet and no more than 50% of the principal dwelling, it shares the principal dwelling’s driveway, and it is not rented to non-family members^6,7. Only 1 accessory dwelling is allowed per lot, the owner must live in the principal dwelling, and the accessory dwelling needs a 911 address and a building permit first⁷. Manufactured-home parks require special use in the A-2 or R-2 district and must meet state and county health rules³¹. We could not confirm the rule for an individual manufactured home outside a park; ask Community Development before purchase¹².

1. Confirm that the parcel is unincorporated and have Community Development identify its zoning district, permitted residential use, minimum lot size and setbacks^1,2,26.

1. Resolve subdivision, floodplain and driveway-access questions before final design^2,10.

1. Have the Health Department determine whether the site can use private sewage or must connect to an available sewer, and obtain septic and well permits as needed^4,27.

1. Assemble the address, health or sewer approval, road-access approval, energy report, scaled plans and site plan; submit the required full plan sets for a single- or two-family dwelling, addition or residential accessory dwelling^5,10.

1. Pay the applicable fees and submit the residential package to Community Development; an owner doing the work may mark the contractor field SELF^8,10,12.

1. Arrange the required inspections with Community Development, then obtain a certificate of occupancy before using the structure; a temporary certificate may cover up to 60 days before completion^12,32.

Start with jurisdiction and zoning because these county rules apply to unincorporated Tazewell County, while incorporated places may regulate land separately². Confirm the district, minimum lot size, setbacks, subdivision status and legal road access with Community Development before treating a listing as buildable^1,2,10,26. Ask whether floodplain permitting or an elevation certificate applies because the county administers a floodplain ordinance but the project-specific triggers remain unconfirmed². Resolve sewer availability and soil suitability early because a nearby public sewer can prevent approval of a private system, and only 20.4% of county soils are rated without severe limits for a conventional drain field^27,29. Work on a driveway within county-highway right-of-way requires a written County Engineer permit, with a $15 entrance-permit fee³³. If access enters a state-maintained highway, obtain the state permit before right-of-way work begins³⁴. The effective property-tax rate is about 2.1%, and the median annual bill is about $3,481²⁹.