Chapter 8.08
NOISE

Sections:

8.08.010    Policy.

8.08.020    Administration.

8.08.030    Definitions.

8.08.040    Environmental sound levels – Unlawful sounds.

8.08.050    Environmental sound levels – Maximum permissible sound levels.

8.08.060    Environmental sound levels – Maximum permissible nighttime sound levels.

8.08.070    Sound reductions for pure tone and impulsive sounds.

8.08.080    Sound measurement.

8.08.090    Exemptions – Sounds always exempt.

8.08.100    Exemptions – Sounds exempt during daytime hours.

8.08.110    Exemptions – Permitted events.

8.08.120    Exemptions – Temporary construction sounds.

8.08.130    Work hours for commercial construction and development activities.

8.08.140    Exemptions – Emergency generators.

8.08.150    Public nuisance noise.

8.08.160    Public disturbance noise.

8.08.170    Motor vehicles – Maximum permissible sound levels.

8.08.180    Motor vehicles – Mufflers.

8.08.190    Motor vehicles – Modification to motor vehicles.

8.08.200    Motor vehicles – Tire sounds.

8.08.210    Motor vehicles – Sale of new motor vehicles, which exceed maximum permissible sound levels.

8.08.220    Motor vehicles – Exemptions.

8.08.230    Watercraft – Maximum noise limits.

8.08.240    Watercraft – Mufflers.

8.08.250    Noise variance.

8.08.260    Enforcement.

8.08.270    Chapter additional to other law.

8.08.010 Policy.

The City Council finds that inadequately controlled noise adversely affects the health, safety and welfare of the people, the value of property, and the quality of the environment. Therefore, it is hereby declared to be the policy of the City of Woodinville to minimize the exposure of citizens to the harmful, physiological, and psychological effects of excessive noise. It is the express intent of the City to control the level of noise in a manner which promotes commerce, the use, value and enjoyment of property, sleep and repose, and the quality of the environment. (Ord. 793 § 2 (Att. A), 2025)

8.08.020 Administration.

The Police Department serves an important function in maintaining public health, safety and welfare by responding to resident complaints, typically in the context of neighborhood noise disturbances. The Director also plays an important role in noise control through oversight of permitted activities that generate noise, such as construction work. The Police Chief and the Director each have authority to enforce this chapter pursuant to its provisions. (Ord. 793 § 2 (Att. A), 2025)

8.08.030 Definitions.

The definitions in this section apply throughout this chapter unless the context clearly requires otherwise.

“City Manager” means the person appointed pursuant to WMC 2.09.010.

“Commercial construction and development activities” means the performance of construction activities, including any associated subsidiary action or the use or movement of equipment or heavy equipment, performed in exchange for compensation or payment.

“Construction” means any site preparation, grading, building, demolition, substantial repair, alteration or similar action.

“dB(A)” means the sound level measured in decibels, using the “A” weighting network.

“Decibel” means a unit expressed on a logarithmic scale, for measuring the relative intensity of sounds, ranging from zero for the average least perceptible sound to about 130 for the average pain level of the human ear.

“Director” means the Director of Development Services, or another person designated by the City Manager.

“District” means the land use zones to which this chapter is applied (see Chapter 21.20 WMC). For the purposes of this chapter:

(a) “Residential District” means Class A EDNA environments and includes the R-1, R-4, R-6, R-8, R-12, R-18, R-24 and R-48 zoning districts set forth in WMC Title 21;

(b) “Commercial District” means Class B EDNA environments and includes the NB, TB, CBD, EMU, GB, O, P/I and P zoning districts as well as lands designated with Highway set forth in WMC Title 21.

(c) “Industrial District” means Class C EDNA environments and includes the T/I and I zoning districts set forth in WMC Title 21.

“EDNA” means the environmental designation for noise abatement, being an area or zone (environment) within which maximum permissible noise levels are established using the criteria set forth in WAC 173-60-030.

“Equipment” means any stationary or portable device or any part thereof capable of generating sound.

“Impulsive sound” means sound having the following qualities: the peak of the sound level is less than one second and short compared to the occurrence rate; the onset is abrupt; the decay rapid; and the peak value exceeds the ambient level by more than 10 dB(A).

“Legal holiday” means those dates prescribed in RCW 1.16.050(1).

“Leq” as used in this chapter means the A-weighted, equivalent continuous sound level, in decibels, having the same total sound energy as the fluctuating level measured during the same time frame. Also known as LAeq.

“Lmax” means the maximum sound level over a measurement interval determined by using a sound level meter set to “fast” response time.

“Muffler” means a device consisting of a series of chambers or other mechanical designs for receiving exhaust gas from an internal combustion engine, or for the purpose of introducing water to the flow of the exhaust gas, and that is effective in reducing sound resulting therefrom.

“Noise” means the intensity, duration and character of sounds from all sources.

“Person” means any individual, firm, association, partnership, corporation or any other entity, public or private.

“Plainly audible” means any sound that can be detected by unaided hearing faculties of normal acuity, including, but not limited to, being able to detect the rhythmic bass component of music coming from a sound amplifier regardless of whether the title, specific words or artist performing the song can be identified.

“Police Chief” means the person appointed with the powers and duties to administer the Police Department.

“Property boundary” means the surveyed line at ground surface, which separates the real property owned, rented, or leased by one or more persons, from that owned, rented, or leased by one or more other persons, and its vertical extension.

“Public highway” means the entire width between the boundary lines of every way publicly maintained by the Washington State Department of Transportation or any county or city when any part thereof is generally open to the use of the public for purposes of vehicular travel as a matter of right.

“Qualified noise professional” means a person professionally trained and qualified to perform the necessary tasks to identify, evaluate, manage and mitigate impacts related to noise.

“Real property” means an interest or aggregate of rights in land that is guaranteed and protected by law. “Real property” includes a leasehold interest.

“Receiving property” means real property within which a sound originating from outside the property is received.

“Sound level” means the weighted sound pressure level measured using a metering characteristic and weighted as specified in American National Standards Institute Specifications, Section 1.4-1983.

“Sound level meter” means a device or combination of devices which measures sound pressure levels and conforms to Type 1, Type 2 or Type 3 standards as specified in the American National Standards Institute Specification S1.4-1983. An impulse sound level meter shall be a peak or impulse, unweighted sound level meter, which is capable of measuring impulse sound in conformance with the Type 1 or Type 2 specifications of ANSI S1.4-1983.

“Watercraft” means any contrivance, including aircraft taxiing, but excluding aircraft in the act of actual landing or takeoff, used or capable of being used as a means of transportation or recreation on water, powered by an internal or external combustion engine.

“Weekday” means Monday through Friday and that is not a legal holiday.

“Weekend” means Saturday and Sunday and that is not a legal holiday. (Ord. 793 § 2 (Att. A), 2025)

8.08.040 Environmental sound levels – Unlawful sounds.

It is unlawful for any person to cause sound, or for any person in possession of property to permit sound originating from such property, to intrude into the real property of another person whenever such sound exceeds the maximum permissible sound levels established by this chapter. (Ord. 793 § 2 (Att. A), 2025)

8.08.050 Environmental sound levels – Maximum permissible sound levels.

(1) For sound sources located within the City limits, the maximum permissible sound levels are set forth in Table 8.08.050, unless prescribed otherwise by this chapter.

Table 8.08.050

Maximum Permissible Sound Levels

District of Noise Source

District of Receiving Property

Residential

Commercial

Industrial

Residential

55 dB(A)

57 dB(A)

60 dB(A)

Commercial

57 dB(A)

60 dB(A)

65 dB(A)

Industrial

60 dB(A)

65 dB(A)

70 dB(A)

(2) During any measurement interval, Lmax shall not exceed the maximum permissible sound levels in Table 8.08.050 by more than 15 dB(A). (Ord. 793 § 2 (Att. A), 2025)

8.08.060 Environmental sound levels – Maximum permissible nighttime sound levels.

The maximum permissible sound levels established by WMC 8.08.050 are modified during nighttime hours according to the following:

(1) Between the hours of 10:00 p.m. and 7:00 a.m. on weekdays, and between 10:00 p.m. and 9:00 a.m. on weekends, the maximum permissible sound levels in Table 8.08.050 shall be reduced to the levels set forth in Table 8.08.060.

Table 8.08.060

Maximum Permissible Nighttime Sound Levels

District of Noise Source

District of Receiving Property

Residential

Commercial

Industrial

Residential

45 dB(A)

57 dB(A)

60 dB(A)

Commercial

47 dB(A)

60 dB(A)

65 dB(A)

Industrial

50 dB(A)

65 dB(A)

70 dB(A)

(2) During any measurement interval, Lmax shall not exceed the maximum permissible sound levels in Table 8.08.060 by more than 15 dB(A).

(3) The following sounds are exempt from the nighttime maximum permissible sound levels in Table 8.08.060:

(a) Sounds created by existing stationary equipment used in the conveyance of water by a utility; and

(b) Sounds created by electrical substations. (Ord. 793 § 2 (Att. A), 2025)

8.08.070 Sound reductions for pure tone and impulsive sounds.

(1) For any source of sound that has a “pure tone component,” the levels established by WMC 8.08.050 and 8.08.060 shall be reduced by five dB(A), except this reduction shall not be imposed on any electrical substation. “Pure tone component” means sound having the following qualities: a one-third octave band sound pressure level in the band with the tone that exceeds the arithmetic average of the sound pressure levels of the two contiguous one-third octave bands by:

(a) Five decibels for center frequencies of 500 Hz and above;

(b) Eight decibels for center frequencies between 160 and 400 Hz; and

(c) Fifteen decibels for center frequencies less than or equal to 125 Hz.

(2) For any source of sound that is impulsive and not measured with an impulse sound level meter, the levels established by WMC 8.08.050 and 8.08.060 are reduced by five dB(A). (Ord. 793 § 2 (Att. A), 2025)

8.08.080 Sound measurement.

(1) Sound measurements should be conducted by a qualified noise professional.

(2) If the measurement of sound is made with a sound level meter, it shall be an instrument in good operating condition and shall meet the requirements for a Type 1 or Type 2 instrument, as described in American National Standards Institute Specifications Section 1.4-1983, as it now exists or as hereafter amended. If the measurements are made with other instruments, or assemblages of instruments, the procedure must be carried out in such a manner that the overall accuracy shall be at least that called for in Section 1.4-1983, as it now exists or as hereafter amended for Type 2 instruments.

(3) Except where specified otherwise in this chapter, sound level measurements shall be based on Leq during the measurement interval using a minimum measurement interval of one minute for constant sound sources, or a 30-minute measurement for noncontinuous sound sources.

(4) When the location, distance or technique prescribed in this chapter for measurement of sound is impractical, or would yield misleading or inaccurate results, measurements may be taken at other locations or distances using appropriate correction factors. (Ord. 793 § 2 (Att. A), 2025)

8.08.090 Exemptions – Sounds always exempt.

The following sounds are exempt from the maximum permissible sound levels set forth in this chapter:

(1) Sounds originating from aircraft in flight and sounds that originate at airports, which are directly related to flight operations;

(2) Sounds created by normal docking and undocking operations of all watercraft that otherwise meet the requirements of this chapter;

(3) Sounds created by watercraft;

(4) Sounds created by motor vehicles when regulated by Chapter 173-62 WAC;

(5) Sounds created by safety and protective devices, such as relief valves, if noise suppression would defeat the safety intent of the device;

(6) Sounds created by fire alarms;

(7) Sounds created by warning devices of not more than five minutes in duration per incident. For the purposes of this subsection, “warning device” means a device that is working as intended to provide public warning of potentially hazardous, emergency or illegal activities, including, but not limited to, a burglar alarm or vehicle backup signal, but not including any fire alarm;

(8) Sounds created by emergency equipment and emergency work necessary in the interests of law enforcement or for the health, safety, or welfare of the community. For the purposes of this subsection, “emergency work” means work required to restore property to a safe condition following a disaster; work required to protect persons or property from an imminent danger; work by private or public utilities for providing or restoring immediately necessary utility service; or work to address other emergencies as determined by the Director;

(9) Sounds caused by natural phenomena and unamplified human voices; and

(10) Sounds originating from officially sanctioned parades and other approved public events. (Ord. 793 § 2 (Att. A), 2025)

8.08.100 Exemptions – Sounds exempt during daytime hours.

The following sounds are exempt from this chapter between 7:00 a.m. and 10:00 p.m. on weekdays and between 9:00 a.m. and 10:00 p.m. on weekends:

(1) Sounds originating from residential property relating to temporary projects for the maintenance or repair of homes, grounds and appurtenances;

(2) Sounds created by bells, chimes or carillons not operating for more than five minutes in any one hour;

(3) Sounds created by blasting;

(4) Sounds created by the installation or repair of essential utility services; and

(5) Sounds originating from lawful pickets, marches, rallies and similar events. (Ord. 793 § 2 (Att. A), 2025)

8.08.110 Exemptions – Permitted events.

Events at approved venues, public parks, or stadiums such as sporting events, concerts, outdoor movies, festivals, and similar events may have noise restrictions established under the City’s permit approval process on a case-by-case basis in lieu of the standards set forth in this chapter. Generally, nighttime noise from these events should be restricted between 10:00 p.m. and 7:00 a.m., but the Director may modify these hours. The Director may condition approvals under this section on mitigating noise impacts to nearby residences such as limiting the times and days of the event, restricting the maximum sound amplification, and/or requiring other mitigation measures to reduce noise impacts. (Ord. 793 § 2 (Att. A), 2025)

8.08.120 Exemptions – Temporary construction sounds.

Normal and usual sounds created by temporary construction activities are exempt from the maximum permissible sound levels set forth in this chapter provided:

(1) The maximum permissible nighttime sound levels set forth in WMC 8.08.060 shall apply to receiving residential districts;

(2) The operation of heavy equipment, including crawlers, tractors, bulldozers, rotary drills and augers, loaders, power shovels, cranes, derricks, graders, off-highway trucks, ditchers, trenchers, compactors, compressors and other similar equipment, on a construction site are restricted to the hours between 7:00 a.m. and 7:00 p.m. weekdays and between 9:00 a.m. and 5:00 p.m. on Saturday;

(3) The operation of impact types of construction equipment including pavement breakers, pile drivers, jackhammers, sandblasting tools or other types of equipment or devices on a construction site that create impulse noise or impact noise, are restricted to the hours between 8:00 a.m. and 5:00 p.m. on weekdays and between 9:00 a.m. and 5:00 p.m. on Saturday; and

(4) In addition to the hour limitations set forth in this section, all construction activities shall follow the limitations set forth in WMC 8.08.130. (Ord. 793 § 2 (Att. A), 2025)

8.08.130 Work hours for commercial construction and development activities.

(1) In addition to the hour limitations on temporary construction sounds in WMC 8.08.120, commercial construction activity and development activities are limited to take place only between the hours of 7:00 a.m. and 7:00 p.m. on weekdays, and between 8:00 a.m. and 5:00 p.m. on Saturday. No such work is allowed on Sundays or legal holidays.

(2) The Director may authorize in writing the conduct of commercial construction and development activities outside the hours specified in subsection (1) of this section if such work will not unreasonably interfere with any residential use. The Director may attach such conditions as necessary to protect the public health, safety and welfare.

(3) For emergency repairs, hour restrictions shall not apply. The Director shall determine what qualifies as an emergency repair. (Ord. 793 § 2 (Att. A), 2025)

8.08.140 Exemptions – Emergency generators.

Sounds created by emergency generators are exempt from this chapter if:

(1) Operating as necessary during periods when there is no electrical service available from the primary supplier due to natural disaster or power outage; or

(2) Conducting periodic testing, as required by the manufacturer. Testing shall be limited to the hours between 8:00 a.m. and 8:00 p.m. (Ord. 793 § 2 (Att. A), 2025)

8.08.150 Public nuisance noise.

(1) It is unlawful for any person to cause, or for any person in possession of property to allow originating from the property, sound that is a public nuisance noise. For the purposes of this section, “public nuisance noise” means any sound that unreasonably annoys, injures, interferes with or endangers the comfort, repose, health or safety of a community or neighborhood, although the extent of damage may be unequal.

(2) A noise need not exceed the maximum permissible sound levels of this chapter or be a public disturbance noise, as described in WMC 8.08.160, to be a public nuisance noise. (Ord. 793 § 2 (Att. A), 2025)

8.08.160 Public disturbance noise.

(1) It is unlawful for any person to cause, or for any person in possession of property to allow originating from the property, sound that is a public disturbance noise. For the purposes of this section, “public disturbance noise” means any sound that unreasonably disturbs or interferes with the peace, comfort or repose of a person or persons. The hour of the day at which the sound occurs may be a factor in determining reasonableness. Sounds that are public disturbance noises may include but are not limited to:

(a) The frequent, repetitive, or continuous sounding of any horn or siren attached to a motor vehicle, except as a warning of danger or as specifically permitted or required by law;

(b) The frequent, repetitive or continuous noise made by any animal which unreasonably disturbs or interferes with peace, comfort and repose of property owners or possessors, except that such sounds shall not include those originating from lawfully operated animal shelters, kennels, pet shops, and veterinary clinics, during the hours between 6:00 a.m. and 10:00 p.m.;

(c) Yelling, shouting, hooting, whistling or singing on or near the public streets between the hours of 11:00 p.m. and 7:00 a.m., or at any time and place to unreasonably disturb or interfere with peace, comfort and repose of property owners or possessors;

(d) Frequent, repetitive, or continuous sounds in connection with the starting, operating, repairing, rebuilding or testing of any motor vehicle, motorcycle, off-highway vehicle, watercraft or internal combustion engine within or received by a residential district;

(e) The use of a sound amplifier or other device capable of producing or reproducing amplified sound for the purpose of commercial advertising or sales or for attracting the attention of the public to any vehicle, structure, or property or the contents therein, except as permitted by law, and except that vendors whose sole method of selling is from a moving vehicle shall be exempt from this subsection;

(f) Loud and raucous sound generated within 1,000 feet of any school;

(g) Loud and raucous sound that emanates frequently, repetitively, or continuously from any building, structure, or property, including watercraft, which unreasonably interferes with the peace, comfort and repose of owners or possessors of real property;

(h) Frequent, repetitive, or continuous sound, including but not limited to impulsive or amplified sound such as emanating from an audio device, where the sound is plainly audible or can be felt at 50 feet or more from the source of sound, or 300 feet or more if the source of sound is from a watercraft;

(i) Any sound out of doors that interferes with normal conversation at 50 feet distance or more from the source of the sound when the sound is received in a residential district;

(j) Sound from vehicle audio systems operated at a volume to be plainly audible greater than 50 feet from the source; or

(k) Any other unreasonably loud, disturbing, continuous, irritating, or unnecessary noise, whether emanating from a human, animal, or mechanical source.

(2) A noise need not exceed the maximum permissible sound levels of this chapter or be a public nuisance noise to be a public disturbance noise.

(3) The provisions of this section shall not apply to permitted events as set forth in WMC 8.08.110. (Ord. 793 § 2 (Att. A), 2025)

8.08.170 Motor vehicles – Maximum permissible sound levels.

It is unlawful for any person to operate upon any public highway any motor vehicle or any combination of motor vehicles under any conditions of grade, load, acceleration or deceleration in such manner as to exceed the maximum permissible sound levels for the category of vehicle in Table I of WAC 173-62-030, as measured at a distance of 50 feet from the center of the lane of travel within the speed limits specified, by measurement procedures established by the State Commission on Equipment. (Ord. 793 § 2 (Att. A), 2025)

8.08.180 Motor vehicles – Mufflers.

It is unlawful for any person to operate, or for any owner to permit any person to operate, any motor vehicle on the public highways, which is not equipped with a muffler in good working order and in constant operation. (Ord. 793 § 2 (Att. A), 2025)

8.08.190 Motor vehicles – Modification to motor vehicles.

It is unlawful for any person to modify or change any part of a motor vehicle or install any device thereon in any manner that permits sound to be emitted by the motor vehicle in excess of the limits prescribed by this chapter. It is unlawful for any person to remove or render inoperative, or cause to be removed or rendered inoperative, other than for purposes of maintenance, repair or replacement, any muffler or sound dissipative device on a motor vehicle. (Ord. 793 § 2 (Att. A), 2025)

8.08.200 Motor vehicles – Tire sounds.

It is unlawful for any person to operate a motor vehicle in such a manner as to cause, or allow to be emitted, squealing, screeching or other such sound, from the tires in contact with the ground because of rapid acceleration or excessive speed around corners or other such reasons. However, sound resulting from emergency braking to avoid imminent danger is exempt from this section. (Ord. 793 § 2 (Att. A), 2025)

8.08.210 Motor vehicles – Sale of new motor vehicles, which exceed maximum permissible sound levels.

It is unlawful for any person to sell or offer for sale a new motor vehicle as defined by WAC 173-62-020, except an off highway vehicle, which produces a maximum sound level exceeding the sound levels in Table III of WAC 173-62-030 at a distance of 50 feet, by acceleration test procedures established by the State Commission on Equipment. (Ord. 793 § 2 (Att. A), 2025)

8.08.220 Motor vehicles – Exemptions.

Sounds created by motor vehicles are exempt from the maximum permissible sound levels of WMC 8.08.050 and 8.08.060, except that sounds created by any motor vehicle operating off public highways shall be subject to the sound levels of WMC 8.08.050 and 8.08.060, when such sounds are received in a Residential District. (Ord. 793 § 2 (Att. A), 2025)

8.08.230 Watercraft – Maximum noise limits.

(1) It is unlawful for any person to operate any watercraft on the water within the City of Woodinville in such a manner as to exceed the following maximum noise limits when measured within 50 feet of the shoreline or anywhere within a receiving property:

(a) At any hour of the day or night, the limit for any receiving property shall be 74 dB(A); and

(b) Between the hours of 10:00 p.m. and 7:00 a.m., the limit for sounds received within a Residential District shall be 64 dB(A).

(2) Sounds created by auxiliary equipment operated on watercraft for the purposes of dredging or pile driving are governed under the provisions for construction sounds.

(3) Chapter 352-67 WAC, relating to vessel sound level measurement procedures, is adopted by reference. (Ord. 793 § 2 (Att. A), 2025)

8.08.240 Watercraft – Mufflers.

(1) It is unlawful for any person to operate any watercraft, except aircraft, on the waters inside the City limits, which is not equipped with a functioning underwater exhaust or a properly installed and adequately maintained muffler. Any one or more of the following defects in the muffling system shall constitute a violation of this section:

(a) The absence of a muffler;

(b) The presence of a muffler cut out, bypass, or similar device, which is not standard or normal equipment for the exhaust system being inspected;

(c) Defects in the exhaust system including, but not limited to, pinched outlets, holes, or rusted through areas of the muffler or pipes;

(d) The presence of equipment that will produce excessive or unusual noise from the exhaust system.

(2) Dry stacks or water injected stacks not containing a series of chambers or mechanical designs effective in reducing sound shall not be considered as adequately maintained mufflers. (Ord. 793 § 2 (Att. A), 2025)

8.08.250 Noise variance.

(1) The purpose of a noise variance is to provide relief where immediate compliance with the requirements of this chapter cannot be achieved because of special circumstances rendering immediate compliance unreasonable.

(2) Procedures. A noise variance application is processed as a Type 1 decision pursuant to the review procedures set forth in Chapter 21.80 WMC. The Director is designated as the decision authority to decide noise variances.

(3) Criteria for Approval. The Director may approve a noise variance if:

(a) Immediate compliance with such requirement cannot be achieved because of special circumstances rendering immediate compliance unreasonable considering economic or physical factors, encroachment upon an existing noise source, or because of nonavailability of feasible technology or control methods;

(b) The total number of days upon which relief is requested does not exceed 14 days, except additional days may be allowed if notice to the public consistent with subsection (7) of this section is provided with an opportunity for the public to comment prior to a decision being issued; and

(c) That the request for relief is the minimum necessary.

(4) Conditions of Approval. The Director may attach reasonable conditions as necessary to safeguard public health, general welfare, and safety.

(5) Lapse of Approval. A noise variance shall expire after one year from the later date of the decision being issued or an appeal becoming final. However, the Director may grant a longer approval period provided the longer period is not detrimental to public health, general welfare, and safety.

(6) Submission Requirements. A request for a noise variance shall meet the submission requirements set forth in WMC 21.80.070 and the following:

(a) Identify the specific section or sections of the noise regulations for which the variance is being requested;

(b) Identify all property owners who will be impacted by sound levels exceeding the maximum permissible sound levels if the administrative noise variance is granted;

(c) Include written analyses and supporting documentation demonstrating that the project or activity will not impact a substantial number of people or endanger public health or safety; and

(d) Proposed mitigation measures to minimize noise impacts on nearby property owners.

(7) Noticing Requirements.

(a) The Director may require notice for any request for a noise variance involving 14 days or less. Pursuant to subsection (3)(b) of this section, notice is mandatory for any request for a noise variance involving more than 14 days.

(b) A written notice shall at a minimum be sent by first class mail to all property owners impacted by sound levels exceeding the maximum permissible sound levels notifying them of the proposed noise variance.

(c) The content of the written notice shall be determined by the Director and, when required pursuant to subsection (3)(b) of this section, shall include a statement of a public comment period, which shall not be less than 14 days or more than 30 days.

(d) The address of the property owner and/or taxpayer of record on file with the King County Assessor shall serve as the official record where notice shall be mailed.

(e) Any mailed notice required by this chapter shall be adequate when a good-faith effort has been made to identify and mail notice to the address of property owners or taxpayers of record on file with the King County Assessor.

(f) Notice mailed to people at their known address shall be judged to have been received by those people if those people and their addresses are named in an affidavit or declaration of mailing. Failure of any person or owner of property to receive the notice shall not invalidate any permit or approval.

(8) Any person granted a variance in accordance with the procedures of this section shall be exempt from the maximum permissible sound levels or public disturbance provisions established by this chapter to the extent provided in the variance. (Ord. 793 § 2 (Att. A), 2025)

8.08.260 Enforcement.

(1) Violations of This Chapter.

(a) All offenses defined in this chapter relating to the operation of motor vehicles shall constitute traffic infractions. Other violations of the provisions of this chapter shall constitute Class 1 civil infractions per Chapter 7.80 RCW, which is hereby incorporated by reference, except as provided in subsection (2) of this section.

(b) Each day of violation shall be deemed a separate infraction.

(2) Nothing in this section shall limit the City’s authority to pursue any remedy available under Chapter 8.07 or 1.06 WMC, or any party’s right to seek relief from any alleged public nuisance under State or common law. (Ord. 793 § 2 (Att. A), 2025)

8.08.270 Chapter additional to other law.

The provisions of this chapter shall be cumulative and nonexclusive and shall not affect any other claim, cause of action or remedy. Unless otherwise specifically provided, this chapter shall not be deemed to repeal, amend, or modify any law, ordinance or regulation relating to noise, but shall be deemed additional to existing legislation and common law on noise. (Ord. 793 § 2 (Att. A), 2025)