Lafayette Parish, LA Noise from Specific Sources: HVAC & Mechanical Noise (2026)
Key Facts
- Residential AC night cap
- 55 dB(A)
- Steady-tone HVAC reduction
- minus 5 dB(A) from Table I
- Standard residential night limit
- 50 dB(A)
- Applies in
- City of Lafayette and unincorporated parish
- Minimum fine
- $150.00
Summary
Residential AC and HVAC units in Lafayette Parish are capped at 55 dB(A) at night, and steady-tone HVAC noise gets a stricter 5 dB(A) cut from normal limits.
Such sound sources include, but are not limited to: heating, ventilating or air-conditioning units; refrigeration units; and transformers. Nothing to the contrary withstanding, sound sources from residential heating, ventilating or air conditioning units can not exceed 55 dB(A) at night.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 65).
Full Breakdown
Lafayette City-Parish's noise code singles out HVAC equipment twice. Under Sec. 34-366(d), steady pure-tone sources like heating, ventilating, air-conditioning units, refrigeration units and transformers must meet limits 5 dB(A) below the standard Table I caps (60 dB(A) daytime, 50 dB(A) night in residential zones). On top of that, residential HVAC/AC units specifically cannot exceed 55 dB(A) at night, regardless of the other limits. The code applies in both the City of Lafayette and unincorporated parish areas, 'Lafayette' is defined at Sec. 34-362 to mean both.
Violations & Fines
Enforced by noise control officers and police; violations run through the enforcement/compliance process in Sec. 34-370, with a minimum fine of $150.00 under Sec. 1-9(c) once a violation is classified major or a minor violation goes uncorrected.
Frequently Asked Questions
What noise limit applies to my home AC unit at night in Lafayette?
Does this rule cover Broussard or Youngsville too?
Sources & Official References
Other rules in Lafayette Parish
Compare Lafayette Parish to another location·View the Louisiana noise from specific sources overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.