However, if you live in a flat it is likely that the noise will be heard by your neighbours so it is advisable not to use after 11pm when people are trying to sleep. This may still be too late for some people, if they have young children sleeping or they wish to relax in the evening and 9pm may be more appropriate.
The Maricopa County Noise Ordinance is enforced by the Sheriff's Department, you can contacted them at (602) 876-1000.
It's important to note that cities and counties in Arizona adopt their own curfew laws. For example, the City of Phoenix has a curfew that applies to minors under the age of 16, and they must not be in public places between 10 pm and 5 am on weekdays, and between 12 am and 5 am on weekends.
For residential environments, the accepted decibel level is lower. Any noise exceeding 70 dB is considered disturbing. Residential limits usually start at 60 or 55 dB (the equivalent noise of a regular vacuum cleaner). Time limits usually apply after 10 pm and until 7 am.
It shall be unlawful and a violation of this chapter to conduct or permit any activity, or to produce, create or allow any noise beyond that person's property boundary or on a public street or highway, which exceeds ninety-two (92) dB(A) between a.m. and p.m. daily or sixty-five (65) dB(A) between p.m.
Yelling, shouting, hooting, whistling or singing on the public streets, particularly between the hours of P.M. A.M., or at any time or place so as to annoy or disturb the quiet, comfort or repose of persons in any hospital, dwelling, hotel or other type of residence, or of persons in the vicinity.
Most local noise ordinances designate "quiet hours"—for example, from 10 p.m. to 7 a.m. on weekdays and until 8 or 9 a.m. on weekends. So, running a power mower might be permitted at 10 a.m. on Saturday, but not at 7 a.m. Some universally disturbing sounds are commonly banned or restricted.
The Maricopa County Noise Ordinance is enforced by the Sheriff's Department, you can contacted them at (602) 876-1000.
The subject could be in violation of Phoenix City Code Noise Ordinance 23-12 if construction work is creating unreasonably loud, disturbing and unnecessary noise as described by Phoenix City Code 23-14(h): Building construction.