Noise from Specific Sources in Norwalk, CT (2026)
4 verified noise from specific sources rules for Norwalk, Connecticut, sourced directly from the municipal code and official government pages.
Verified from official government sources
HVAC & Mechanical Noise
Norwalk caps nighttime noise from residential HVAC equipment, air conditioners, heat pumps and condenser units, at 50 dBA, a specific carve-out from the general 45 dBA outdoor residential nighttime ceiling in the noise ordinance's Table 1. The Noise Control Administrator measures compliance at the property line.
Norwalk Nighttime HVAC Noise Limit
Some RestrictionsNorwalk Code § 68-5C(10)
Notwithstanding the Sound Level limits found in Table 1, the permissible Sound Level limit for residential HVAC equipment during Nighttime Hours shall be 50 dBA when measured as specified in § 68-4C.
Car Alarm Limits
Norwalk requires every interior and exterior burglar alarm on a building or motor vehicle to shut itself off within 5 minutes for a continuous sound or 15 minutes for an intermittent sound once triggered. Outside those windows the alarm no longer gets the noise ordinance's decibel exemption.
Norwalk Burglar Alarm Shutoff Time Limit
Some RestrictionsNorwalk Code § 68-5C(11)
All interior and exterior burglar alarms of a building or Motor Vehicle must be activated in such a manner that the burglar alarm terminates its operation within five minutes for continuous airborne Sound and 15 minutes for intermittent Sound after it has been activated. At all other times the limits set forth in Table 1 do not apply.
Generator Noise
Norwalk exempts standby and portable generators from noise limits only during an actual power outage; routine testing is confined to weekday Daytime Hours at 60 dBA and generators may not run overnight in a residential zone without an outage. Construction-site generators face the same 60 dBA daytime cap.
Norwalk Generator Noise Rules
Some RestrictionsNorwalk Code § 68-5C(12)
The operation of a standby or portable generator is exempt from the limits in this Chapter when there is a power outage affecting the subject property. The regular testing/exercising of a generator must be conducted on weekdays (Monday through Friday) during Daytime Hours and for the minimum duration suggested by the manufacturer. During such testing the Sound Level limit shall be 60 dBA at the...
Low-Frequency Bass Limits
Norwalk treats a plainly audible rhythmic bass beat from a car stereo or speaker as proof of a noise violation on its own, and caps vehicle sound-amplifying equipment at the same decibel limits as any other noise source under City Code Chapter 68.
Norwalk Bass and Amplified Sound Rules
Some RestrictionsNorwalk Code §§ 68-3, 68-7
PLAINLY AUDIBLE: Any Sound that can be detected by an investigator using his or her unaided hearing faculties of normal acuity. As an example, if the sound source under investigation is a portable or vehicular sound amplification or reproduction device, the detection of the rhythmic bass component of the music is sufficient to verify Plainly Audible Sound. The investigator need not determine th...