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Deer Lagoon.jpg                                                   Critical Areas

What are Critical Areas?

Critical Areas in Island County are environmentally sensitive natural resources that have been designated for protection and management in accordance with the requirements of our State's Growth Management Act (GMA). Protection and management of these areas is important to the preservation of ecological functions of our natural environment, as well as the protection of the public health, safety and welfare of our community.

CLICK HERE TO SUBSCRIBE to our email distribution list and stay informed on any proposed changes to the Critical Areas Ordinance.

 List of Qualified Environmental Consultants


Critical Areas and My Development

​Step 1 ​Field Indicators Worksheet
​If you are submitting a development proposal (building permit or land use permit), you need to fill out and submit a Field Indicators Worksheet even if there are no known critical areas on your property .The Wetland I.D. Guide contains instructions for completing the Field Indicators Worksheet.
​Step 2
​Identify Streams and Wetlands
Follow these instructions to determine if Island County has a record of a wetland or stream on or near your property:
  • Click Here to access IC Geo Map.
  • One you pull up the map, you can type your parcel number or address into the search bar.
  • Then click the layers button at the bottom left of your screen.
  • Check the box next to critical areas, and click the plus sign to expand the options below.
  • Turn on the appropriate layers by clicking the boxes next to wetlands, streams regulatory, and streams cartographic.
  • If your property is affected by a wetland, stream, wetland buffer, or stream buffer then complete the appropriate instructions listed in step 3 & 4.
  • Please note, not all wetlands and streams are mapped by Island County, and absence of data on IC Geo Map does not preclude critical areas regulatory requirements.
​Step 3
​Identify Other Critical Areas
If you are submitting a development proposal, you need to address all critical areas found on your parcel. View Island County's Critical Area Maps here to determine if other known critical areas are present on your property which include:
  • Other Fish and Wildlife Habitat Conservation Areas (FWHCAs):*
    • Habitats of Local Importance
    • Washington Natural Heritage Program Sites
  • Geologically Hazardous Areas
  • Frequently Flooded Areas
  • Critical Aquifer Recharge Area

* Species of local importance habitat and Marine Fish & Wildlife Habitat Conservation Areas (MFWHCAs) are not publicly available. Planning Staff will determine whether your proposal is within the vicinity of these habitats.

Step 4
​Letter of Determination
If you have a development proposal and critical areas are mapped on or near your property, you will need to contact an environmental consultant. Below is a link to environmental consultants who have submitted their qualifications to Island County for inclusion on the list:

Island County List of Qualified Environmental Consultants

A Letter of Determination from an environmental consultant is required to confirm that your project will not impact any critical areas or their buffers. Below is a link to an example Letter of Determination.

Letter of Determination Explained

Example Letter of Determination

​Step 5
​Critical Areas Permits and Reports
​If your project will impact critical areas and their buffers, you will need to obtain the relevant permit and submit the specific required report with your permit application. For more information on which permit and report to submit, please contact Shawn Morris, the Critical Areas Planner, see contact information below.

Critical Areas Planner



Staff Contact

Camano Annex Main Phone
(360)-387-3443