Peoria County, IL Building Setbacks & Zoning: Setback Rules (2026)
Key Facts
- R-1 side setback
- 15 feet, principal or accessory structure
- R-1 rear setback
- 25 feet principal, 15 feet accessory
- Local street road setback
- 25 feet from right-of-way
- State highway road setback
- 75 feet, or 135 feet from centerline
- No setback reduction
- Existing setbacks cannot shrink further, Sec. 6.1.1
Summary
In Peoria County's R-1 Low Density Residential District, principal structures must sit at least 15 feet from a side lot line and 25 feet from the rear line, while accessory buildings need 15 feet on both sides. Road setbacks run far deeper, from 25 to over 100 feet depending on road classification.
2.Side.a.Telecommunications Carrier Facilities: Not less than ten (10) feet from the lot line.b.Small Wind Energy Conversion Systems (noncommercial): 1.1 times the WECS total height.c.WECS Towers: Subject to standards set forth in Section 7.2 ("Wind Energy Conversion Systems").d.Other uses:1.Principal Structure: Not less than fifteen (15) feet from the property line.2.Accessory Structure: Not less than fifteen (15) feet from the property line.3.Rear.a.Telecommunications Carrier Facilities: Not less than ten (10) feet from the lot line.b.Small Wind Energy Conversion Systems (noncommercial): 1.1 times the WECS total height.c.WECS Towers: Subject to standards set forth in Section 7.2 ("Wind Energy Conversion Systems").d.Other uses:1.Principal Structure: Not less than twenty-five (25) feet from the property line.2.Accessory Structure: Not less than fifteen (15) feet from the property line.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 52).
Full Breakdown
Peoria County's Unified Development Ordinance fixes minimum setbacks separately for road frontage, side yards, and rear yards in each zoning district, with the R-1 Low Density Residential District's standards set out at UDO Sec. 2. Side and rear setbacks for "other uses," meaning ordinary houses and accessory buildings rather than telecom or wind-energy facilities, require a principal structure to sit at least 15 feet from a side property line and 25 feet from the rear line, while accessory structures need only 15 feet on either side.
Road setbacks are far larger and depend on the road's classification: a state highway requires 75 feet from the right-of-way (or 135 feet from the road's centerline, whichever is greater) for residential uses, a county primary road requires 75 feet, a county non-primary road requires 40 feet, a collector street requires 40 feet, and a local street requires just 25 feet from the right-of-way. For square corner lots, Sec. 2 treats the road setback as applying to both the front yard containing the main entrance and the side yard facing the right-of-way, with the remaining yards treated as ordinary side setbacks.
No setback lawfully in place on the ordinance's effective date may later be reduced below the current minimum for equivalent new construction, a continuing-obligation rule set out in Sec. 1.
Violations & Fines
Constructing a principal or accessory structure closer to a lot line than the district's minimum setback without an approved variance is a zoning violation subject to enforcement by the Peoria County Planning and Zoning Department, which can deny or revoke a building permit and compel removal or relocation of a noncompliant structure. Property owners must seek a variance from the Zoning Board of Appeals before building within a required setback.
Frequently Asked Questions
How far from my property line must a house sit in Peoria County's R-1 district?
How wide is the road setback for a Peoria County property on a local street?
Can Peoria County shrink an existing setback for new construction?
Sources & Official References
Other rules in Peoria County
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