Permitting and Code Documents Relevant to SR 530 Slide Area

A large mudslide occurred on March 22, 2014, blocking SR 530 and the north fork of the Stillaguamish River. To address the numerous media and public records request related to the slide, PDS is providing maps, data, and information to respond to frequently asked questions related to development activity within the slide area. Although every attempt has been made to ensure this information is accurate, it is subject to change and verification as new information becomes available. 

Permitting Information

Applications, permits, and Assessor information for tax parcels within affected slide area
SFR = single family residential
MH = mobile home

Additional Resources

Land Use Codes

Current Snohomish County Code (SCC)

Historic Snohomish County Code (SCC)

Building Codes

The County's building codes are located within Title 30 - Unified Development Code of the Snohomish County Code (SCC). The County's building codes are based on a suite of international "model" codes that are adopted and amended by the Washington State Building Code Council.

Best Available Science

Snohomish County's land use regulations, adopted pursuant to the State Growth Management Act, and most recently updated in 2007 consistent with the Act's "Best Available Science" mandate, require that development permit applications comply with the Geologically Hazardous Areas provisions found in Chapter 30.62B SCC. The following documents relate to the development of the County's 2006 Critical Areas Regulations (CAR).


Reports, publications and other related information from external sources.

Contact Us

For additional questions that pertain to building permits, land use code, or any other development regulations within the SR 530 Slide area, please contact PDS staff via our SR 530 Contact Form. PDS staff will either answer your questions directly, or update our web page accordingly.

Disclaimer: This information is not to be considered an official citation to, or representation of, the Snohomish County Code. Snohomish County makes no representation or warranty concerning the content, accuracy, currency, completeness or quality of this information and expressly disclaims any warranty of merchantability or fitness for any particular purpose. All persons accessing or otherwise using this information assume all responsibility for the use thereof and agree to hold Snohomish County harmless from and against any damages, loss, claim, or liability arising out of any error, defect, or omission contained within said information.

- Page content updated on 7/28/14 -