Evanston, IL Building Safety: Fire Sprinkler Requirements (2026)
Key Facts
- Applies to
- new one- and two-family dwellings
- Design standard
- NFPA 13D
- ADU exception
- detached, under 1,000 sq ft
- Penalty
- $150-$750 escalating fine
Summary
Evanston requires an automatic sprinkler system, designed to NFPA 13D, in every new one- and two-family dwelling, with a narrow exception for additions to existing unsprinklered homes.
R313.2 One- and two-family dwellings automatic sprinkler systems. An automatic sprinkler system shall be installed in one- and two-family dwellings.
Exception: This exception has been revised to read as follows:
An automatic sprinkler system shall not be required for additions or alterations to existing buildings that are not already provided with an automatic sprinkler system, provided that the project does not meet the definition of a "demolition" as defined in R202, or when adding a detached accessory dwelling unit to existing buildings that are not already provided with a sprinkler system. The following conditions shall exist for the accessory dwelling unit exception:
1)The unit meets the definition and conditions of an Accessory Dwelling Unit per 6-4-6-10 Special Regulations Applicable to Accessory Dwelling Units (ADUs) of the City Zoning Code.2)The existing primary residence is not required to have an automatic residential sprinkler system3)The accessory detached dwelling unit does not exceed 1,000 square feet in size.4)The unit is on the same lot as the primary residence. R313.2.1: Design and installation. This section has been revised to read as follows: Automatic residential sprinkler systems shall be designed and installed in accordance with NFPA 13D.
R331 Wrecking, Demolition, or Razing of Structures.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 21).
Full Breakdown
The amended Residential Code requires an automatic sprinkler system in one- and two-family dwellings. The exception covers additions or alterations to existing buildings that aren't already sprinklered, so long as the work isn't a full demolition, and covers adding a detached accessory dwelling unit under 1,000 square feet to an existing, unsprinklered primary residence on the same lot. Systems must be designed and installed to NFPA 13D. This is separate from the city's older Section 4-4-3 sprinkler mandate covering dormitories, hospitals, non-owner-occupied rooming/lodging houses, and nursing homes.
Violations & Fines
Violations of the residential sprinkler mandate carry the Residential Code's penalty schedule: $150 for a first offense, $400 for a second, and $750 for a third or later, with each day a separate violation.
Frequently Asked Questions
Do all new houses in Evanston need fire sprinklers?
Does a new accessory dwelling unit need sprinklers?
Sources & Official References
Other rules in Evanston
Compare Evanston to another location·View the Illinois building safety overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Fire Sprinkler Requirements in Nearby Cities
How other cities in Cook County handle fire sprinkler requirements.