7 am - 8 pm Monday through Friday
9 am - 6 pm Saturday
No construction on Sundays or observed holidays
There are a few exceptions:
1) Highway construction
2) Sounds coming from a residential property caused by temporary projects necessary for the maintenance or repair of homes, grounds, and appurtenances.
For those purposes, construction noise is allowed from 7 pm - 10 pm any day of the week.
For more information about noise and construction regulations, see BMC 8.26.065.