There are generally noise regulations, but they are not suited towards shift workers or night owls and they don't limit the noise much during the day. Also, at

There are generally noise regulations, but they are not suited towards shift workers or night owls and they don't limit the noise much during the day. Also, at least for the City of Seattle[0], lawn maintenance equipment is allowed to put out at least 80db during the day. [0]: Example for City of Seattle: https://library.municode.com/wa/seattle/codes/municipal_code?nodeId=TIT25ENPRHIPR_CH25.08NOCO_SUBCHAPTER_IIIENSOLE_25.08.425SOCRCOMAEQ https://library.municode.com/wa/seattle/codes/municipal_code...