​Flood Hazard Maps - Digital Flood Insurance Rate Maps (DFIRMs)

Snohomish County is in the process of adopting new flood insurance rate maps also known as FIRM maps. Flood Insurance Rate Maps (FIRMs) are the official maps on which the Federal Emergency Management Agency (FEMA) has delineated special flood hazard areas and risk zones. They show the location of a property relative to special flood hazard areas, which is one of the factors determining flood insurance rates. More information on FIRMs is available at the floodsmart.gov website.

New maps will be in a digital format known as the Digital Flood Insurance Rate Maps. The updated DFIRMs were released to the county on July 22, 2016 and available for view at the Planning and Development Services Counter. The county is partnering with FEMA and other county departments to host two public information meetings to introduce the maps and discuss how these changes may affect property owners with in these areas.
What do I need to know before the meeting?
It is a good idea to view the DFIRMs prior to attending the meeting to identify any changes that may affect your property. The Flood Insurance Study (FIS) and DFIRM panels are available for download below and viewing in person at the PDS office.  

Property owners with parcels in the special flood hazard areas should contact PDS
to see if there are proposed changes to the flood hazard designation on their property. The effective or current adopted maps can be viewed at the FEMA Map Service Center https://msc.fema.gov/portal#.

Property owners may contact Zach Brown (
zach.brown@snoco.orgwith Surface Water Management, to produce a property map to bring to the public meeting. When emailing your request in please include your address or parcel identification number. This map will include the preliminary DFIRMs flood hazard designation. 
Public Meetings:
November 28, 2016 - 6:00 p.m. to 8:00 p.m.
Snohomish County Campus
Admin. Building E., Public Meeting Rooms 1 and 2. 
3000 Rockefeller Ave. 
Everett, WA 98201,

December 12, 2016 - 6:00 p.m. to 8:00 p.m.
Sultan High School Commons
13715 310th Ave SE, Sultan, WA 98294
What to expect at the meeting:
The public meeting will be an open house format. County departments including Planning and Development Services (PDS), Surface Water Management (SWM/PW), and Emergency Management will be available at the meeting to speak with attendees regarding county regulations and assistance. FEMA will also be in attendance and have insurance, mapping and technical staff available to discuss how the maps were created and federal regulations.

There will be a short presentation beginning at 6:15 p.m. Following the presentation attendees will have the opportunity to visit various tables to discuss map changes, insurance requirements, hazard mapping, regulations and disaster planning. 
What happens after the meeting?
The public meetings are the first step in the adoption process. Below is an estimated time for the adoption process (* notes subject to change). These dates will be updated as the process moves forward.

 Appeal Period Start

 February 15, 2018

 Appeal Period Ends

 May 15, 2018

 Delivery of Risk Assessment Database

 Spring 2018*

 Letter of Final Determination (countywide)

 October 2018*

 Delivery of Risk Report


 Maps and FIS become Effective (countywide)

 April 2019*

How can I stay up to date or find out more information?
This page will be updated as the process moves forward. Below are documents regarding this process and links to other resources regarding flooding and development in the special flood hazard areas.

DFIRMs Elements: Maps and Flood Insurance Study

To view the map for your property area first find the appropriate map panel number by referring to the Panel Index 1 or 2. Then click on the DFIRM Panels and locate the corresponding map panel.  
Flood Insurance Study:
Also see the accompany Preliminary Flood Insurance Study for detailed information. 

Preliminary Summary of Map Amendments (SOMA):
If you have previously applied for a letter of map change (LOMC), revision (LOMR) or amendment (LOMA) please check the below documents for your case number. Not all LOMC are shown on the preliminary DFIRMs due to scale limitations or because the LOMC issued had determined that the lot(s) or structure(s) involved were outside the Special Flood Hazard Area, as shown on the FIRM. These LOMCs will be revalidated free of charge 1 day after the revised FIRM becomes effective through a single revalidation letter that reaffirms the validity of the previous LOMCs. SOMAs are listed by jurisdiction. If you do not see your case number please contact Planning and Development Services (425) 388-3311.


For additional information regarding the DFIRMs:
  • Contact FEMA for additional information on the DFIRMs, by calling the FEMA Map Information eXchange (FMIX), (877) 336-2627, or by visiting FEMA’s Flood Map Service Center at msc.fema.gov 
  • Contact Zach Brown, SWM (zach.brown@snoco.org) for a customized property map to bring with you to the public meetings. This is recommended to save you time at the meeting. 


The below links provide information specific to properties near or behind levees.


Snohomish County Code chapters 30.43C and 30.65 regulate development in the special flood hazard area.

For additional information in applying these regulations to properties in the special flood hazard area please contact Planning and Development Services at (425) 388-3311 or
www.snohomishcountywa.gov/askpermittech and enter Flood Hazard as your category or reference DFIRMs in your comments.

Contact Us

Rebecca Samy
Senior Planner
425.388.3311 x2283

Jennifer Lenz

Land Development Specialist
425.388.3311 x2823