Building Safety in Naperville, IL (2026)
9 verified building safety rules for Naperville, Illinois, sourced directly from the municipal code and official government pages.
Verified from official government sources
Elevator Maintenance
Naperville replaces the International Building Code's elevator chapter outright: Section 5-1A-3 requires every elevator and conveying system in the city to conform to the state's Illinois Elevator Safety Rules, 41 Ill. Admin. Code 1000.60, rather than IBC Section 3001. A new elevator installation costs $149 to permit, and the city separately charges $81 for the annual inspection and $50 for any reinspection.
Naperville Elevator Code & Permit Fees
Some RestrictionsNaperville Municipal Code § 5-1A-3 (IBC § 3001, as amended)
The design, construction, installation, alteration, repair and maintenance of elevators and conveying systems and their components shall conform to the current state mandated Illinois Elevator Safety Rules, 41 ILL. Adm. Code 1000.60, as amended from time to time.
Scaffold & Sidewalk Shed
In Naperville, Illinois, any scaffold or ladder that overhangs a public street or alley must be firmly constructed and safeguarded, and tools can't be left where they could fall from above four feet.
Naperville Scaffold & Ladder Safety Rules
Some RestrictionsNaperville Municipal Code § 10-2-4-7
Any scaffold or ladder placed in such a way that they overhang or can fall onto any public street, alley or other public place in the City shall be firmly constructed and safeguarded; and it shall be unlawful to place or leave any tools or articles on any such place in such a manner that the same can fall onto any such street, sidewalk, alley or other public place from a height greater than fou...
Fire Sprinkler Requirements
Naperville requires an automatic fire sprinkler system in every new one- and two-family dwelling under Municipal Code Section 5-1B-2's amendment to IRC Section R309.2. Two narrow exceptions exist: additions and accessory structures on homes that were never sprinklered, and new homes built with fire-rated stair protection and two separate means of egress from each unit.
Naperville Home Fire Sprinkler Mandate
Heavy RestrictionsNaperville Municipal Code § 5-1B-2 (IRC § R309.2, as amended)
R309.2 One- and two-family dwellings automatic fire systems. Changed to read as: An automatic residential fire sprinkler system shall be installed in one- and two-family dwellings. Exceptions: 1. An automatic residential fire sprinkler system shall not be required for additions, alterations or accessory structures to existing buildings that are not already provided with an automatic residential...
Anti-Mansionization
Naperville caps teardown and infill homes in R1, R1A, R1B, and R2 districts at two and a half stories, 35 feet, with a 40-foot roof peak: even where the base zoning district would allow more.
Naperville Teardown Home Height Limits
Some RestrictionsNaperville Municipal Code § 6-2-26
It is the intent and purpose of this Section to regulate the height and building coverage of single-family detached dwelling units and duplexes in existing neighborhoods in R1, R1A, R1B and R2 zoning districts, in order to prevent the overcrowding of land...4.2.Maximum Height: The maximum height shall be two and one-half (2½) stories not to exceed thirty-five feet (35'). In addition, the maximu...
Carbon Monoxide Detectors
New construction in Naperville must include a carbon monoxide alarm within 15 feet of every sleeping area in homes with fuel-fired appliances or an attached garage, under the city's amended residential code.
Naperville Carbon Monoxide Alarm Rules
Some RestrictionsNaperville Municipal Code § 5-1B-2 (IRC § R311.1)
R311.1 Carbon monoxide alarms: Change to read as follows: For new construction, an approved carbon monoxide alarm shall be installed outside and within 15 feet of each separate sleeping area in the immediate vicinity of the bedrooms in dwelling units within which fuel-fired appliances are installed and in dwelling units that have attached garages. R311.4 Single And Multiple Station Carbon...
Building Permits
Naperville requires a building permit before constructing, altering, or remodeling any building or structure, under Naperville Municipal Code Section 5-1A-3, the city's local amendments to International Building Code Section 105. A permit issues only once the lot is fully improved under Title 7, or the owner agrees in writing to complete those improvements, and Naperville narrowed the IBC exemptions so only fences three feet or under skip the permit step. The Chief Building Official administers the program.
Naperville Building Permit Requirements And Exemptions
Some RestrictionsNaperville Municipal Code § 5-1A-3 (IBC §§ 105.2, 105.8, as amended)
Section 105.2 Work Exempt From Permit: Delete nos. 1, 3, 6, 8, 9 and change no. 2 to read: Fences not over 3 feet high. Section 105.8 Condition Of Permit: No permit shall be issued to allow the construction, alteration, or remodeling of any building or structure unless: (1) The lot or parcel of real estate upon which the building or structure is located or is to be constructed is fully improved...
Electrical Permits
Naperville wires its permitting to the 2023 National Electrical Code under Municipal Code Section 5-1F-1, adopted as NFPA 70-2023 alongside the ICC Electrical Code, both amended locally. Section 5-1F-2 deletes the NEC's alternative engineered design option and its entire means-of-appeal chapter, and a copy of both adopted codes stays on file at Transportation, Engineering and Development for public inspection.
Naperville Electrical Code Adoption & Permits
Some RestrictionsNaperville Municipal Code § 5-1F-1
5-1F-1: - ADOPTION: 1.For the purposes of supplementing the provisions and regulations contained in this Title, and for setting forth minimum standards for the installation of electrical wiring, the City hereby adopts by reference the standards, specifications, rules and regulations of the National Fire Protection Association as compiled and published as the National Electrical Code, 2023 edit...
Plumbing Permits
Naperville adopts the Illinois State Plumbing Code as its primary plumbing standard, backed by the International Plumbing Code, with permits required and fees set under the city's fee schedule.
Naperville Plumbing Code & Permits
Some RestrictionsNaperville Municipal Code § 5-1E-1
For the purposes of supplementing the provisions and regulations contained in this Title, the City hereby adopts by reference the Illinois State Plumbing Code (77 Ill. Adm. Code 890), current edition, issued by the Illinois Department of Public Health, except as to those revisions and changes hereinafter set forth. In addition, the City hereby adopts by reference the International Plumbing Cod...
Building Inspections
Naperville Municipal Code Section 1-9H-2 lists the inspections required, in chronological order, for new commercial building construction and major alterations: footing, foundation wall, backfill, underground plumbing, commercial slab, sewer and water, rough framing, rough electric, rough plumbing, electric upgrade, electric service, temporary electric, ceiling, electric ceiling, HVAC ductwork, fire sprinkler, hydrostatic test, final electric, final plumbing, fire alarm, and final inspections. A regular inspection costs $68.00, including clerical review.
Naperville Building Inspection Sequence And Fees
Some RestrictionsNaperville Municipal Code § 1-9H-2
1.3.Inspection fees Regular inspection 68.00 (Including clerical review) 1.4.Timed inspection/reinspection $68.00 minimum ($50.00 per hour, plus $18.00 clerical review) 1.4.1.Inspections most commonly required for new commercial building construction and major alterations listed in chronological order: Footing* Electric service Foundation wall* Temporary electric Backfill Ceiling Underground pl...
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