Naperville, IL Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Governing section
- Naperville Municipal Code § 6-2-26
- Max coverage
- 35% or 2,280 sq ft
- Garage credit
- Up to 480 sq ft
- One-story exemption
- Fully exempt from cap
Summary
Naperville limits new teardown and infill homes to 35% building coverage of the lot, or 2,280 square feet, whichever is larger, with credit for detached garages capped separately in the rear yard.
5.Building Coverage: Notwithstanding any lot or building coverage regulation provided in the underlying zoning district, tear down, infill single-family detached dwelling units or tear down/infill duplexes shall comply with the lot coverage regulations contained herein.5.1.Maximum Building Coverage: The maximum building coverage shall be thirty-five percent (35%) or two thousand two hundred eighty (2,280) square feet, whichever is the greater, of the total lot area.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 101).
Full Breakdown
Naperville Municipal Code § 6-2-26 caps building coverage for qualifying teardown and infill single-family homes and duplexes at thirty-five percent of total lot area or 2,280 square feet, whichever is greater, overriding whatever coverage limit the underlying zoning district otherwise allows. Single-story porches are excluded from the calculation, and a detached garage earns up to a 480-square-foot credit against the cap; a garage sited wholly or partly in the rear yard must also stay within the district's 25% rear-yard coverage limit. One-story and one-and-one-half-story teardown and infill homes are exempt from the coverage cap entirely.
Violations & Fines
Exceeding the coverage cap blocks building permit approval at plan review; a structure built over the limit is a zoning violation carrying Naperville's general penalty of $100 to $500 per day (§ 1-4-1).
Frequently Asked Questions
What's the maximum lot coverage for a teardown rebuild in Naperville?
Does a detached garage count against Naperville's teardown lot coverage cap?
Sources & Official References
Other rules in Naperville
Compare Naperville to another location·View the Illinois building setbacks & zoning overview
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