Kendall County, IL Zoning Overlays & Bonuses: Density Bonus Law (2026)
Key Facts
- Base density
- 0.33 units/buildable acre
- Maximum density
- 0.45 units/buildable acre
- Largest single bonus
- 0.07 units (secondary open space)
- Open space floor
- 30 percent of total acreage
- Approval authority
- County Board
Summary
In unincorporated Kendall County's RPD-1 Residential Planned Development district, base density of 0.33 units per buildable acre can rise to a 0.45-unit maximum through County Board-approved bonuses for open space access, innovative stormwater design and expanded open space.
The following density incentives may be used to increase development density in the RPD-1 district up to the permitted maximum density in each RPD district. Provision of multiple amenities shall not entitle the applicant to a density which exceeds the maximum density for the applicable RPD district. Regardless of the application of density bonuses, at least thirty (30) percent of the total acreage must be designated as open space.(1)Provision of public access to open space areas (bonus not to exceed three hundredths (0.03) dwelling units per buildable acre, subject to approval by the County Board). ... (3)Secondary open space that is substantially more than the minimum size otherwise required for stormwater detention or through park dedication requirements (bonus not to exceed seven hundredths (0.07) dwelling units per buildable acre, subject to approval by the County Board).
Full Breakdown
45 unit maximum density fixed in Section 36-359. 01 units. 45-unit maximum, and no matter how many amenities are provided, at least 30 percent of the total acreage must still be designated as open space, a floor the code repeats in the base-density, maximum-density and incentive sections alike.
Violations & Fines
Claiming a density bonus without County Board approval of the specific incentive, or developing above the 0.45 dwelling-unit-per-buildable-acre ceiling in Section 36-359, is a violation of the RPD-1 development standards enforced by the Planning, Building and Zoning Department under the general penalty in Kendall County Code Section 36-3.
Frequently Asked Questions
How much can density bonuses increase development in Kendall County's RPD-1 district?
What is the single largest density bonus available?
Does using every density bonus reduce the open space requirement?
Sources & Official References
Other rules in Kendall County
Compare Kendall County to another location·View the Illinois zoning overlays & bonuses overview
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