Oak Park, IL Building Safety: Fire Sprinkler Requirements (2026)
Key Facts
- Who must comply
- New one- and two-family dwellings
- System required
- Automatic residential fire sprinkler system
- Exception
- Additions/alterations without existing system
- Existing structures
- Governed separately by appendix § AJ101.9
- General fine range
- $20 to $750 per day, § 1-1-5
Summary
Village Code § 7-6-2 amends the adopted residential code to require an automatic residential fire sprinkler system in every new one- and two-family dwelling built in Oak Park, though additions and alterations to existing homes without a system already installed are exempt.
SECTION R313 - AUTOMATIC FIRE SPRINKLER SYSTEMS R313.2 One- And Two-Family Dwellings Automatic Fire Systems. An automatic residential fire sprinkler system shall be installed in new construction of one- and two-family dwellings. Exception: An automatic residential fire sprinkler system shall not be required for additions or alterations to existing buildings that are not already provided with an automatic residential sprinkler system.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: 2026 S-9: Code current through: Ord. 26-159, passed - -2026).
Full Breakdown
Oak Park adopts the International Residential Code by reference under § 7-6-1 and amends it under § 7-6-2. 2 that an automatic residential fire sprinkler system shall be installed in new construction of one- and two-family dwellings. The Village carved out one exception: an automatic residential fire sprinkler system is not required for additions or alterations to existing buildings that were not already equipped with one, so owners renovating or expanding an older home without an existing sprinkler system are not forced to retrofit the whole house.
9, covering sprinkler requirements when existing buildings are brought into the process. Because this sits inside the residential code amendments rather than the Village's separate Zoning Ordinance, the requirement applies to plan review and permitting for any new single-family or two-family home, townhouse, or duplex constructed in the Village, and it is checked at the building permit and inspection stage alongside the rest of the adopted residential code, including the fire-resistance rating and separation-distance standards for exterior walls set out in the same chapter.
Violations & Fines
Constructing a new one- or two-family dwelling without the required automatic fire sprinkler system is a residential code violation subject to the general penalty of Village Code § 1-1-5: a fine of $20 to $750, with each day of noncompliance treated as a separate offense, in addition to any permit or occupancy delays imposed by the building official pending correction.
Frequently Asked Questions
Does every new house in Oak Park need a fire sprinkler system?
Do I need to add sprinklers when remodeling my existing home?
Where do sprinkler rules for existing buildings live?
What happens if a new home is built without the required sprinklers?
Sources & Official References
Other rules in Oak Park
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