All extension fees can be found on the Department of Permitting Services website under "Fees and Taxes".  Look under "Fees" from the header then "Fee Regulations" link for the current regulations and resolutions or by type of construction links.  
 
Online users who have additional questions and would like to be contacted by a departmental staff member may submit a request by clicking on the  Create Service Request  button below. Please complete all of the fields in the  Contact Information  section, provide the property address in the  Service/Incident Address information section and provide a brief description of the request in the  Brief Description  field.