Building Setbacks & Zoning in DuPage County, IL (2026)
3 county-level rules, plus city-specific rules for 1 city in DuPage County, Illinois.
Verified from official government sources
Setback Rules
Unincorporated DuPage County's R-1 single-family district requires a 40-foot front yard, 20-foot interior side yards, a 40-foot corner side yard, and a 50-foot rear yard. Zoning Ordinance Sec. 37-701.4(A) sets those minimums alongside a 36-foot base height limit and a .20 floor area ratio for every principal building on the lot.
DuPage County R-1 Yard Setback Rules
Some RestrictionsDuPage County Zoning Ordinance Sec. 37-701.4(A)
Notwithstanding section 37-700.4 of this chapter and except as otherwise provided herein, each principal building located in the R-1 district shall provide for one (1) front yard, two (2) interior side yards or one (1) interior side yard and one (1) corner side yard, and one (1) rear yard. ... A.Minimum Yard, Height, FAR and Lot Coverage Required: Use: Front Yard Interior Side Yard Corner Side ...
Structure Height Limits
DuPage County's R-1 single-family district caps building height at 36 feet under Sec. 37-701.4(A), but a lot of 40,000 square feet or more can add a foot of height for every foot all required yards are increased, up to a hard ceiling of 72 feet.
DuPage County R-1 District Height Limit
Some RestrictionsDuPage County Zoning Ordinance § 37-701.4(A)
A.Minimum Yard, Height, FAR and Lot Coverage Required: Single-family detached dwelling 40′ 20′ 40′ 50′ 36′, (except that where a lot size is 40,000 sq. ft. or more, the height of a building or attached structure may be increased 1′ for each 1′ all required yards are increased. The required yard increase shall be measured from the portion of the building or attached structure which exceeds the m...
Lot Coverage Limits
In DuPage County's unincorporated R-5 General Residence District, Sec. 37-705.8(B) caps ground coverage by buildings and structures at 40% for single-family detached homes, 50% for two-family and multi-family dwellings, 40% for mobile home parks, and 60% for every other permitted or conditional use.
DuPage County R-5 District Lot Coverage Cap
Some RestrictionsDuPage County Zoning Ordinance § 37-705.8(B)
Uses allowed in the R-5 general residence district (permitted or conditional uses) are subject to the following: A.Multiple Buildings: Notwithstanding mobile home parks, any development containing more than one (1) principal building on a zoning lot shall be approved only by planned development.B.Maximum Zoning Lot Coverage: Notwithstanding Section 37-705.1 of this chapter, the sum total of the...
Building Setbacks & Zoning by City in DuPage County
1 cities in DuPage County have their own building setbacks & zoning rules. Each link goes to that city's dedicated page with code citations.
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