Our Facility


Fast, Friendly Service with our Storage Professionals.  

At Mountainside Storage we have a solution for reorganizing your life, without having to part with the things you want to keep forever. Our affordable self-storage facility in Sultan WA offers customers like you simple and convenient storage options you will feel great about.

Peace of Mind.

Unlike other self storage facilities, at Mountainside Storage you'll have the peace of mind of being able to access your items at any time. Whether you're looking to store a few small items or an entire household, Mountainside Storage offers many different storage units to choose from, and our flexible lease agreement gives you the freedom to only stay as long as you want to. 

  • Many Storage Spaces & Sizes 
  • Boxes & Moving Supplies
  • RV & Boat Parking
  • Video Cameras
  • Fully Fenced & Gated
  • On-Site Manager
Experience the Difference! 

We hope to be able to serve you with solutions to your storage needs. Please visit us for a free tour, and a complimentary cup of Keurig coffee or tea!