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Environmental (SEPA) Documents
SEPA environmental documents for non-project actions in 2015, 2016, 2017, 2018, 2019, 2020, 2021, and 2022.
Environmental Impact Statement for the 2024 Comprehensive Plan Update
- Determination of Significance and Request for Comments on Scope of Environmental Impact Statement (EIS) - Snohomish County 2024 Comprehensive Plan Update (Issue Date: 11/01/2021)
- Draft Environmental Impact Statement (DEIS) by chapter: (Issued Date: 09/06/2023)
- Cover and Front Matter
- Chapter 1 - Summary
- Chapter 2 - Proposal and Alternatives
- Chapter 3.1 - Natural Environment
- Chapter 3.2 - Built Environment
- Chapter 4 - References
- Chapter 5 - Appendices (Large file, approx. 650MB, may take a while to download
Supplemental Environmental Impact Statement for the 2015 Comprehensive Plan
- Draft Supplemental Environment Impact Statement (PDF) - Amendments to the General Policy Plan Related to Final Docket XX (Issue date: 6/7/21)
- /DocumentCenter/View/85065/Final-SEIS-DocketXX_092721 Final Supplemental Environmental Impact Statement (PDF) - Amendments to the General Policy Plan Related to Final Docket XX - Winde (SW6) (Issue date: 9/27/2021)
Addenda to the Final Environmental Impact Statement for the Critical Area Regulations
- Addendum 1 (PDF) - Final Environmental Impact Statement of the Critical Area Regulations (Issue date:7/07)
- Addendum 2 (PDF) - Final Environmental Impact Statement of the Critical Area Regulations (Issue date: 7/2/15)
- Addendum 3 (PDF) - Final Environmental Impact Statement of the Critical Area Regulations (Issue date: 6/27/17)
Addenda to the Final Environmental Impact Statement for the 2015 Comprehensive Plan
- Addendum 1 (PDF) - Amendments to General Policy Plan Related to the Future Land Use Map (Issue date: 12/30/15)
- Addendum 2 (PDF) - Amendments to General Policy Plan Related to Technical Corrections and Map 6 (Issue date: 4/22/16)
- Addendum 3 (PDF) - Amendments to General Policy Plan Related to Maps 4 and 5 (Issue date: 4/22/16)
- Addendum 4 (PDF) - Amendments to General Policy Plan Related to Housing Policies (Issue date: 5/20/16)
- Addendum 5 (PDF) - Amendments to General Policy Plan Related to Innovative Water Supply (Issue date: 5/20/16)
- Addendum 6 (PDF) - Amendments to General Policy Plan Related to Rural Urban Transition Area - Future Land Use Map and Policies (Issue date: 5/20/16)
- Addendum 7 (PDF) - Amendments to Appendix D - Growth Targets, Map 3 - Municipal Urban Growth Area Boundaries, and UGA Land Capacity Analysis (Issue date: 6/24/16)
- Addendum 8 (PDF) - Creation of a new General Policy Plan Chapter Providing for Tribal Coordination (Issue date: 6/24/16)
- Addendum 9 (PDF) - 2017-2022 Capital Improvement Program (Issue date: 9/1/16)
- Addendum 10 (PDF) - Amendments to the General Policy Plan Related to Transportation (Issue date: 5/10/17)
- Addendum 11 (PDF) - Amendments to the General Policy Plan Related to Final Docket XVIII (Issue date: 5/10/17)
- Addendum 12 (PDF) - 2018-2023 Capital Improvement Program (Issue date: 9/7/17)
- Addendum 13 (PDF) - Amendments to the General Policy Plan Related to Final Docket XIX (Issue date: 7/13/18)
- Addendum 14 (PDF) - Amendments to County Arterial Circulation and Countywide Bicycle Facility System maps (Issue date: 7/13/18)
- Addendum 15 (PDF) - Amendments to the General Policy Plan Related to Final Docket XIX: Northshore School District (SW4) (Issue date: 7/13/18)
- Addendum 16 (PDF) - 2019-2024 Capital Improvement Program (Issue Date: 9/7/18)
- Addendum 17 (PDF) - Adopting Map Correction Amendments to the GPP (Issue Date: 4/5/19)
- Addendum 18 (PDF) - 2019 County-initiated Amendments to the General Policy Plan (Issue Date: 7/30/19)
- Addendum 19 (PDF) - 2020-2025 Capital Improvement Program (Issue Date: 09/09/19)
- Addendum 20 (PDF) - 2020 County-Initiated Amendments to the Snohomish County Growth Management Act (GMA) Comprehensive Plan and Implementing Development Regulations (Issue Date: July 28, 2020)
- Addendum 21 (PDF) - 2021-2026 Capital Improvement Program (Issue Date: 09/09/20)
- Addendum 22 (PDF) - Amendments to the General Policy Plan and Capital Facilities Plan related to Final Docket XX and 2021 county-Initiated Technical Corrections (Issue Date: 06/07/2021)
- Addendum 23 (PDF) - Addendum 23 to the Final Environment Impact statement for the Snohomish County Comprehensive Plan 2015 Update Regarding the County’s 2022-2027 Capital Improvement Program (Issue Date: 08/04/2021)
- Addendum 24 (PDF) - Amendments to the Snohomish County Comprehensive Plan related to the 2022 County-Initiated Technical Corrections (GPP22-3) (Issue Date: 4/8/2022)
- /DocumentCenter/View/100862/2023-2028-CIP-SEPA-Addendum-25-Final-Signed Addendum 25 (PDF) - Addendum 25 to the Final Environment Impact statement for the Snohomish County Comprehensive Plan 2015 Update Regarding the County’s 2023-2028 Capital Improvement Program (Issue Date: 07/21/2022)
- Addendum 26 (PDF) - Addendum 26 to the Final Environment Impact statement for the Snohomish County Comprehensive Plan 2015 Update Regarding the County’s 2024-2029 Capital Improvement Program (Issue Date: 08/03/2023)
Environmental Impact Statement for the 2015 Comprehensive Plan
- Draft Environmental Impact Statement
- Final Environmental Impact Statement (PDF)
Addenda to the Final Supplemental Environment Impact Statement for VISION 2050
- Addendum 1 (PDF) - Addendum 1 to the Final Supplemental Environmental Impact Statement for VISION 2050 regarding the 2021 update of the Countywide Planning Policies (Issue Date: 9/13/2021)
- Addendum 2 (PDF) - Addendum 2 to the Final Supplemental Environmental Impact Statement for VISION 2050 regarding amendments to the Countywide Planning Policies to include the 2044 Initial Population and Employment Growth Targets (Issue Date: 2/14/2022)
- Addendum 3 (PDF) - Addendum 3 to the Final Supplemental Environmental Impact Statement for VISION 2050 regarding amendments to the Countywide Planning Policies to include the 2044 Initial Population and Employment Growth Targets (Issue Date: 7/12/2023)
Determinations of Nonsignificance (DNS) for Code ProjectsRRegulations Relating to Marijuana Retail Facilities (Issue Date: 11/18/2022)Regulations Relating to Marijuana Retail Facilities (Issue Date: 11/18/2022)• Regulations Relating to Marijuana Retail Facilities (Issue Date: 11/18/2022)Regulations Relating to Marijuana Retail Facilities (Issue Date: 11/18/2022)R Relating to Marijuana Retail Facilities (Issue Date: 11/18/2022) https://www.snohomishcountywa.gov/DocumentCenter/View/73493/DFIRM_DNS-with-Signature-Block_43020---signed Regulations Relating to Marijuana Retail Facilities (Issue Date: 11/18/2022)Regulations Relating to Marijuana Retail Facilities (Issue Date: 11/18/2022)jh /DocumentCenter/View/80815
- Relating to Rural Village Housing Demonstration Program (Issue Date: 03/07/2023)
- Relating to County Initiated Areawide Rezones (Issue Date: 02/07/2023)
- Relating to Building Measurement and Daylight Basements (Issue Date: 12/05/2022)
- Relating to Building Separation for One-Story and Two-Story Buildings (Issue Date: 12/05/2022)
- Density Fringe Regulation Amendments (Issue Date 11/30/2022)
- Regulations Relating to Marijuana Retail Facilities (Issue Date: 11/18/2022)
- Rural Cluster Subdivision Code Amendments (Issue Date: 10/10/2022)
- Regulations Related to Residential Development and SEPA Exemption Thresholds (Issue Date: 8/1/2022)
- Relating to Flood Hazard Areas Code Correction (Issue Date: 6/8/2022)
- Relating to Development Application and Permit Expiration Extensions (Issue Date: 6/8/2022)
- Missing Middle and Housing Preservation (Issue Date: 3/31/2022)
- Relating to Appeal Hearing Notice Requirements for Type 1 and Type 2 Permits (Issue Date: 2/3/2022)
- Relating to Subdivisions and Short Subdivisions (Issue Date: 2/3/2022) /DocumentCenter/View/86323/Signed-DNS-and-Environmental-Checklist-20211124 /DocumentCenter/View/86785/UCDRB_DNS_and_Environmental_Checklist_20211209
- Urban Center Design Review Board (Issue Date: 12/13/2021)
- Residential Development in the Business Park Zone (Issue Date: 11/29/2021)
- Roads and Access Regulations (Issue Date: 10/6/21) /DocumentCenter/View/84610/Mineral-Lands_SEPA-Checklist_82621---signed /DocumentCenter/View/84610/Mineral-Lands_SEPA-Checklist_82621---signed /DocumentCenter/View/84610/Mineral-Lands_SEPA-Checklist_82621---signed
- Mineral Resouce Land Use Policies and Development Regulations (Issue Date: 8/30/21) /DocumentCenter/View/80815 /DocumentCenter/View/80867
- International Code Project (I-Codes) - Building Residential Code (Issue Date: 4/9/21)
- /DocumentCenter/View/80815 International Code Project (I-Codes) - Fire Code (Issue Date: 4/9/21)
- /DocumentCenter/View/80815 International Code Project (I-Codes) - Plumbing Mechanical (Issue Date: 4/9/21)
- NPDES Determination of Nonsignificance (Issue Date: 4/9/21)
- Accessory Dwelling Units (Issue Date: 3/29/21)
- Addendum 1 - Accessory Dwelling Units (PDF) (Issue Date: 5/25/2021)
- Addendum 2 - Accessory Dwelling Units (PDF) (Issue Date: 1/13/2022)
- Establishing a Definition for "Started Construction" (Issue Date: 12/3/20)
- Minor Revisions to Conditional Use Permits (Issue Date: 11/9/20)
- Lot Coverage (Issue Date: 10/30/20)
- Revising Farm Worker Dwelling and Wedding Facility Requirements in Certain Rural and Resource Zones (Issue Date: 10/26/20)
- Special Flood Hazard Areas (Issue Date: 10/8/20)
- Flood Insurance Rate Map (Issue Date: 5/4/20)
- Clearview Digital Signs (Issue Date: 7/17/19)
- Planned Residential Development (Issue Date: 4/10/19)
- Lot Size Averaging (Issue Date: 4/10/19)
- Erosion Hazard Area Provisions (Issue Date: 2/14/19)
- Rezone Decision Criteria (Issue Date: 2/8/19)
- Ground Disturbance Provisions (Issue Date: 9/12/18)
- Revising Regulation for Religious Facilities in Rural Business Zones (PDF) (Issue date: 8/27/18)
- Revising Regulations Related to the Transfer of Development Rights (PDF) (Issue date: 7/18/18)
- Amending policy DP-3 of the Countywide Planning Policies (PDF) (Issue date: 3/14/18)
- Prohibiting Supervised Drug Consumption Facilities (PDF) (Issue date: 2/14/18)
- Multifamily Residential Code Amendments (PDF) (Issue date: 2/15/18)
- Commercial Vehicle Home Basing (PDF) (Issue date: 2/8/18)
- Personal Wireless Service Facilities (PDF) (Issue date: 9/7/17)
- NPDES Amendments 2017 (PDF) (Issue date: 8/28/17)
- Pedestrian Facilities (PDF) (Issue date: 6/28/17)
- Urban Residential Development Regulations (PDF) (Issue date: 5/10/17)
- Revising Regulations for Retail Marijuana Businesses (PDF) (Issue date: 1/25/17)
- Adopting the 2015 Edition of the International Building Code and International Residential Code (Issue date: 10/10/16)
- Adopting the 2015 Edition of the International Fire Code (PDF) (Issue date: 10/10/16)
- Adopting the 2015 Edition of the International Mechanical Code, Energy Code, and Plumbing Code (PDF) (Issue date: 10/10/16)
- Revising Regulations for Marijuana Businesses (PDF) (Issue date: 4/21/16)
- Revising Regulations for Marijuana Businesses (PDF) (Issue date: 4/1/16)
- Duplexes in Urban Growth Areas (PDF)(Issue date: 2/11/16)
- Addendum 1 - Duplexes (PDF) (Issue date: 8/11/16)
- Cottage Housing Regulations (PDF) (Issue date: 2/9/16)
- Commercial and Industrial Development (PDF)(Issue date: 11/16/15)
- Addendum 1 - Commercial and Industrial Standards (Issue date: 10/31/16)
- NPDES Reissue (PDF) (Issue date: 10/16/15)
- Revision to Lot Size Averaging Requirements (PDF) (Issue date: 7/24/15)
- Revision to Regulations Pertaining to State Environmental Policy Act (PDF) (Issue date: 7/21/15)
- Transfer of Development Rights Interim Regulations (PDF) (Issue date: 7/21/15)
- Rural Craft Breweries/Distilleries/Wineries (PDF)(Issue date: 7/14/15)
- Addendum 1 - Rural Craft Breweries/Distilleries/Wineries (PDF) (Issue date: 4/22/16)
- Archaeological and Historic Resources (PDF) (Issue date: 3/13/15)
- Airport Compatibility (PDF) (Issue date: 3/11/15)
- Adopting Regulations for Forest Practices (PDF) (Issue date: 2/6/15)
- Revising Regulations for Marijuana Businesses (PDF) (Issue date: 1/15/15)
To access older environmental documents contact Planning and Development Services at 425-388-3311.