Typically, you will not need a permit from the city to do drainage work on your property. Having said that, if the work will involve trapping or diverting a local stream, or affecting a wetland or navigable waterway, a permit likely will be required. Likewise, if the job involves building or enhancing a structure on your property, or doing electrical work (e.g., installing a sump pump) then a permit may be required to proceed. In all cases, Weinstein Construction will be able to pull the permit and do the work for you!